Search Results

The electric flanged ball valve is a ball valve coupled with an electric actuator, which is relatively fast and does not require workers to work hand in hand, saving manpower and time to a large extent. Development and working principle of electric flanged ball valve The electric flanged ball valve is having the same rotation 90 degree lift action, with a circular through hole or passage through its axis. The proportion of the spherical and the channel should be such that when the ball rotates 90 degrees, the entrance and exit should be spherical, so as to cut off the flow. The electric flanged ball valve requires only 90 degrees of rotation of the air and a small turning torque that can be closed tightly. The fully equal body cavity provides a very small, straight passage for the medium. It is generally believed that the ball valve is most suitable for direct opening and closing use, but the recent development of the ball valve has been designed so that it has a throttle and control the flow of use. The main features of the ball valve itself is compact, easy to operate and repair, suitable for water, solvents, acids and natural gas and other general working medium, but also for poor working conditions such as oxygen, hydrogen peroxide, methane and ethylene. Ball valve body can be the whole, it can be modular. First, the characteristics and use of electric flanged ball valve The ball valve is mainly used for cutting off or connected to the medium in the pipeline, can also be used for fluid regulation and control, compared with other valves, with the following advantages. 1, the fluid resistance is small, the ball valve is the valve in all the smallest resistance of a fluid, even the reduced diameter ball valve, the fluid resistance is quite small. 2, thrust bearing to reduce the stem friction torque, the stem can be long-term operation smooth and flexible. 3, the valve seat sealing performance is good, the use of PTFE and other elastic materials made of seals, the structure is easy to seal, and the ball valve sealing capacity increases with the media pressure increases. 4, stem seal is reliable, because the stem is only imitation and movement without lifting movements, stem packing seal is not easy to damage, and the sealing capacity increases with the pressure of the medium increases. 5, due to PTFE and other materials with good self-lubricating, and the ball friction loss is small, so the long life of the ball valve. 6, the lower part of the stem and stem stem to prevent the stem stem spray, such as fire caused by stem seal damage, convex and the valve body can also form a metal contact to ensure that the stem seal. 7, anti-static function: in the sphere, stem, between the valve body set the spring, the switch can produce static electricity derived. Second, the electric flanged ball valve actuator The new series of GT-type pneumatic actuators, double acting and single acting (spring reset), rack and pinion drive, safe and reliable; large diameter valve with a series of AW-type pneumatic actuators pull fork drive, reasonable structure, the output torque Large, double acting and single acting. 1, gear-type double piston, the output torque, small size. 2, the choice of aluminum alloy cylinder material, light weight, beautiful appearance. 3, can be installed at the top, the bottom of the manual operating mechanism. 4, rack-type connection can adjust the opening angle, rated flow. 5, the actuator optional signal feedback instructions and various accessories to achieve automatic operation. 6, IS05211 standard connection for the installation and replacement of the product provides a convenient. 7, the two ends of the adjustable section of the screw can make the standard products in 0 ° and 90 ° with ± 4 ° adjustable range. To ensure synchronization accuracy with the valve. Accessories options The following accessories can be selected according to different controls and requirements: Cut off accessories: single solenoid valve, double solenoid valve, limit switch switch. Adjustable accessories: electrical positioner, pneumatic positioner, electrical converter. Air handling accessories: air filter pressure relief valve, air handling three pieces. Manual mechanism: HVSD manual Third, the implementation of electric flanged ball valve standards 1, design and manufacture: GB12237-89, API608, API 6D, JPI 7S-48, BS5351, DIN3357. 2, flange size: JB / T74 ~ 90 (JB74 ~ 90), GB9112 ~ 9131, HGJ44 ~ 76, SH3406, ANSI B16.5, JIS B2212 ~ 2214, NF E29-211, DIN2543. 3, structural length: GB12221-89, ANSI B16.10, JIS B2002, NF E29-305, DIN3202. 4, test the main test: JB / T 9092, API 598. Fourth, Q641 pneumatic adjustment ball valve performance specifications Nominal diameter mm DN15-DN300 Material code C P R Main Parts Body WCB ZG1Cr18 Ni9Ti ZG1Cr18Ni 12Mo2Ti Sphere 2Cr13 1Cr18Ni9Ti 1Cr18Ni12MoTi Stem 2Cr13 1Cr18Ni9Ti 1Cr18Ni12MoTi Sealing ring reinforced polytetrafluoroethylene para-polystyrene metal seal Filler PTFE flexible graphite Applicable conditions Applicable medium Steam, water, oil Nitric acid Acetic acid Applicable temperature -28 ℃ – 300 ℃ Actuator models DA / SR series, GTD / GTE series, QGSY series. Source: China Ball Valve Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

1 types of dished heads The dished head consists of a convex dished head, a conical shell, a reducing section, a flat cover and a contracting mouth. Convex dished head includes a hemispherical dished head, elliptical dished head, dished and spherical dished head. From the point of view of force, the convex dished head from the hemispherical dished head is not good, but from the point of view of manufacturing difficulties, gradually manufacturing. 2 manufacturing methods of dished heads A) small dished head: integral molding; B) large and medium-sized dished heads: first splicing, forming – the most used, the standard requirements mainly for it; C) oversize dished head: as a result of transportation and open gear wait for a factor to ask, first be pided into valve formation, the latter group is welded together. Splice position of 3 dished heads The splice distance shall be required to be greater than 3 Delta, and not less than 100mm (the weld heat affected zone is a high stress zone, and the chemical composition in the zone will be burnt. Therefore, to avoid high stress zone, the area is related to thickness. According to practical experience, the stress attenuation length is greater than 3 and not less than 100mm. But it is difficult for refrigeration equipment to meet this requirement and has its particularity. The R at the end of the dished dished head avoids splicing and can reduce the thinness and high stress. When stitching, only the radial direction and circumferential direction are allowed. Later, large dished heads may cancel this requirement. Welding joint coefficient of 4 splice dished heads The dished head shall be spliced and then formed, and the welding seam shall be checked by 100% rays or ultrasonic, and the qualification level will go with the shell of the equipment. Finally, the molding weld detection level, the proportion and the equipment shell same, high waste. Give an example： If the equipment shell is 20% tested, the III is qualified. The dished head joint welding seam and final weld line are also III qualified, and the welding joint coefficient is 0.85; If the equipment shell is 100% tested, the II is qualified. The dished head joint welding seam and final weld line are also II qualified, and the welding joint coefficient is 1. Therefore, although the dished head joint inspection of 100%, but the level of conformity is not the same, with the equipment shell go. But pay attention to the manufacturing process: The correct approach is: material (crossed) – plate – molding – plate into nondestructive testing If the test is not done before molding, it is not guaranteed to be qualified after molding. That is to say, nondestructive testing means final nondestructive testing. Source: China Dished Head Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

Stainless steel hose is a kind of high quality flexible pipe in modern industrial pipeline. The utility model is mainly composed of a corrugated pipe, a net sleeve and a joint. The inner pipe of the utility model is a thin wall stainless steel corrugated pipe with a spiral shape or an annular shape, and the mesh sleeve of the outer layer of the corrugated pipe is made of stainless steel wires or steel strips according to certain parameters. The ends or flanges at the ends of the stainless steel hose are matched to the fittings or flanges of the customer’s pipe. Stainless steel bellows are made of extremely thin, seamless or welded stainless steel tubes fabricated by high precision plastic forming. Because the elastic characteristics of corrugated tube profile determines the stainless steel hose has good flexibility and fatigue resistance, making it very easy to absorb all kinds of motion and deformation of cyclic loading, especially has the ability to compensate for large displacement in pipeline system. I plant in addition to the original production of stainless steel hose excellent equipment, also in 1998 the introduction of two high precision, high automatic welding technology of corrugated pipe forming production line, greatly improves the quality of the stainless steel hose and stainless steel hose length is not restricted, to meet the needs of long stainless steel hose. Nominal moon brand stainless steel hose diameter range is DN6-1000mm, length is optional. Net is the main pressure parts stainless steel hose installed in the pressure in the pipeline, and the corrugated pipe to protect, according to the size of the pressure and the applications in the pipeline, can choose one or more layers of stainless steel wire or steel tape weaving, the pressure range of moon brand stainless steel hose general asked PN0.6-32.0MPa, up to 42.0MPa. The main parts of stainless steel hose material is adopted so as to ensure the austenitic stainless steel, stainless steel hose excellent temperature resistance and corrosion resistance, the maximum working temperature range of stainless steel hose, -196-600 s. C, according to the use of stainless steel hose pipe with corrosion selection using stainless steel, stainless steel hose can be ensured corrosion resistance. Stainless steel hose has good flexibility, fatigue resistance, high temperature resistance, high temperature resistance, corrosion resistance and other characteristics, he compared to other stainless steel hose (rubber, plastic stainless steel hose) life is much higher, the comprehensive economic benefits so it has higher, with the development of modern industry, the amount of the demand of high temperature resistance, high pressure stainless steel corrugated metal hose is also becoming more and more large. The scope of use of stainless steel hose: the need to fully flexible pipe, to prevent the vibration of the premises piping, steam, gas, air, heavy oil, oil, chemicals and so on. Source: China Stainless Steel Hose Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

The pneumatic flanged ball valve is a ball valve coupled with a pneumatic actuator, which is relatively fast and does not require workers to work hand in hand, saving manpower and time to a large extent. Pneumatic flange ball valve is evolved from the valve. It has the same rotation of 90 degrees to mention the action, the difference is that the plug body is a sphere, with a circular through hole or passage through its axis. The proportion of the spherical and the channel should be such that when the ball rotates 90 degrees, the entrance and exit should be spherical, so as to cut off the flow. Pneumatic flange ball valve only need to rotate 90 degrees of operation and a small torque can be closed tightly. The fully equal body cavity provides a very small, straight passage for the medium. It is generally believed that the ball valve is most suitable for direct opening and closing use, but the recent development of the ball valve has been designed so that it has a throttle and control the flow of use. The main features of the ball valve itself is compact, easy to operate and repair, suitable for water, solvents, acids and natural gas and other general working medium, but also for poor working conditions such as oxygen, hydrogen peroxide, methane and ethylene. Ball valve body can be the whole, it can be modular. A, the practical effect of pneumatic flange ball valve Stainless steel pneumatic ball valve works by rotating the valve to make the valve open or closed. Pneumatic ball valve switch light, small size, can be made into a large caliber, sealed and reliable, simple structure, easy maintenance, sealing surface and the ball is often closed state, not easily eroded by the media, in various industries have been widely used. Pneumatic flange ball valve in the pipeline is mainly used to do cutting speed, distribution and change the flow direction of the media. Pneumatic ball valve is widely used in recent years, a new type of valve, it has the following advantages: 1. The fluid resistance is small and the drag coefficient is equal to the pipe length of the same length. 2. Simple structure, small size, light weight. 3. Close and reliable, the current ball valve sealing material widely used plastic, good sealing, in the vacuum system has also been widely used. 4. Easy to operate, open and close quickly, from full open to full clearance as long as the rotation 90 °, easy to remote control. 5. Easy maintenance, pneumatic ball valve structure is simple, the seals are generally active, demolition and replacement are more convenient. 6. When fully open or fully closed, the ball and the valve seat sealing surface and the media isolation, the media through, will not cause the valve sealing surface erosion. 7. Applicable to a wide range of diameter from small to a few millimeters, large to a few meters, from high vacuum to high pressure can be applied. Pneumatic three-piece ball valve has been widely used in petroleum, chemical, power generation, paper, atomic energy, aviation, rockets and other departments, as well as people’s daily lives. B, pneumatic ball valve can be pided according to the structure: One, floating pneumatic ball valve The ball of the stainless steel ball valve is floating, and under the action of the medium pressure, the ball can produce a certain displacement and press it on the sealing surface of the outlet end to ensure that the outlet end is sealed. Floating stainless steel pneumatic ball valve structure is simple, good sealing, but the ball to bear the working medium of the load all passed to the export seal, so consider the sealing material can withstand the work of the ball media load. This structure is widely used in medium and low pressure ball valves. Second, fixed ball pneumatic ball valve The ball of the stainless steel pneumatic ball valve is fixed and does not move after compression. Fixed ball valve with a floating seat, by the media pressure, the valve seat movement, so that the seal on the ball to ensure that the seal. Usually with the ball on the lower shaft with bearings, operating torque is small, suitable for high pressure and large diameter valves. In order to reduce the operating torque of the pneumatic ball valve and increase the reliability of the seal, in recent years there have been oil seal ball valve, both in the sealing surface between the injection of special lubricants to form a layer of oil film, which enhances the seal, Torque, more suitable for high pressure large diameter ball valve. Third, the elastic ball pneumatic ball valve The ball of the pneumatic ball valve is elastic. Ball and valve seat seals are made of metal materials, sealing pressure is very large, relying on the pressure of the medium itself has been less than the requirements of the seal, you must exert external force. This valve is suitable for high temperature and high pressure medium. The elastic sphere is an elastic groove at the lower end of the inner wall of the sphere, and is elastic. When closing the channel, use the wedge of the stem to keep the ball open and seal against the seat. Before turning the ball, loosen the wedge head, and the sphere restores the original shape, so that there is a small gap between the ball and the seat, which can reduce the friction and operating torque of the sealing surface. Pneumatic ball valve according to its channel position can be pided into straight-through, three-way and right angle. The latter two ball valves are used to dispense media and change the flow of media. C, pneumatic ball valve instructions 1, Range: This manual applies to the electric (or pneumatic) ball valve of the flange connection. (20) and the ball valve body part, which is connected with the bracket (18) and the connecting shaft (17) by the electric (or pneumatic) actuator (20). 2, the use of restrictions Temperature and pressure limits • The nameplate shows the maximum operating pressure allowed by the ball valve at maximum and minimum operating temperatures. L The use of PTFE or RTFE material seat and seal, the operating temperature should be between -290C to 2000C. The operating temperatures of other types of seats and seals shall be checked by the KI plant. The nominal pressure rating (PN) of the valve indicates the maximum working pressure of the valve in the normal temperature state. (For example: PN4.0, indicating that the operating temperature of -290C ~ 380C when the maximum working pressure of 40 Bar (4.0MPa)). L Please refer to the corresponding instructions for the precautions of electric or pneumatic actuators. 3, installation 1), remove the flange on both sides of the protective cover, the valve is fully open in the state of cleaning and cleaning. 2), before installation should be in accordance with the provisions of the signal (electricity or gas) for machine testing (to prevent the vibration caused by the use of transport performance), qualified before the on-line installation (wiring by electric actuator circuit diagram). 3), ready to be connected with the pipeline before the need to rinse and remove the remaining impurities in the clean pipe (these substances may damage the seat and the ball). 4) During installation, do not use the actuator part of the valve as lifting point to avoid damage to the actuator and accessories. The 5), this type of valve should be installed in the horizontal or vertical direction of the pipeline. 6), the installation point near the pipeline can not be low or bear the phenomenon of external force, you can use the pipe support or support to eliminate the deviation of the pipeline. 7), connect with the pipe, please use the specified torque cross-locking flange connection bolts. 4, operation and use 1), make sure that the piping and valves have been flushed before operation. 2), the valve operation according to the actuator input signal size drive stem rotation is completed: forward rotation 1/4 (900), the valve off. When the reverse rotation is 1/4 turn (900), the valve opens. 3), when the actuator direction indicator arrow parallel to the pipeline, the valve is open; indicating the arrow and the pipeline is vertical, the valve is closed. 5, maintenance Has a long service life and maintenance-free period, will depend on the following factors: normal working conditions, maintain a harmonious temperature / pressure ratio, and reasonable corrosion data Classification and Characteristics of Pneumatic Three – piece Ball Valves Pneumatic ball valve with O-type ball valve and V-type ball valve points. O-type ball valve with floating structure, the core for the precision castings, the appearance of hard chrome plating, the valve seat with enhanced PTFE material, the flow channel and pipe diameter the same, great circulation, flow resistance is very small, when closed Leakage type, generally do the use of open valve, especially for high viscosity, including fiber, granular media; V-type ball valve with a fixed structure, the ball on the V-shaped incision, can achieve proportional adjustment, flow characteristics for the approximate percentage. According to the different equipment can be used pneumatic or electric actuator, respectively, composed of pneumatic ball valve and electric ball valve, pneumatic valve, such as to achieve the proportion of adjustment to be equipped with valve positioner, electric ball valve to achieve the proportion of adjustment to be selected electronic electric actuator or Servo amplifier and so on. From the material, can be pided into: carbon steel ball valve, stainless steel 304 ball valve, 316 ball valve and copper ball valve With the application, can be pided into: high pressure ball valve and low pressure ball valve High-pressure pneumatic ball valve: mainly used in oil, natural gas, hydraulic oil, engineering machinery and other industries Low-pressure pneumatic ball valve: the main application of the media for water and other non-corrosive pipeline! Source: China Ball Valve Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

Flanged butterfly valve Overview: butterfly valve by way of connection classification, the most basic can be pided into: folder-type butterfly valve and flanged butterfly valve, flange type butterfly valve can also be pided into flange type soft seal butterfly valve and Flange type hard seal butterfly valve. Flange-type soft seal butterfly valve: for metallurgical, chemical, power and municipal engineering and water plants and other media for water, Oil and air on the pipeline, from the cut off the fluid or adjust the role of medium flow, the specific features are: 1, the design of new structure, the overall size of small, light weight. 2, butterfly board with double eccentric, open and close quickly, the operation of light and effort. 3, butterfly plate and seal between the non-sliding friction, sealing surface wear, long life, reliable sealing, easy to adjust. Flange-type hard seal butterfly valve with the following characteristics: 1, butterfly plate seal for the soft and hard laminated metal sheet, with a metal hard seal and elastic seal of the double advantages, Both in the case of low temperature and high temperature, have excellent sealing performance. 2, the use of three-dimensional eccentric structure, the valve seat and butterfly plate almost no friction, with the more tight tight tight seal function. 3, the valve body sealing surface, the use of surfacing stainless steel, cobalt-based carbide, sealing surface wear, long service life. 4, the structure of unique, flexible operation, effort, convenience, from the ring pressure high and low impact, reliable sealing performance. Features: 1. Structure length is short, light weight; parts selection well. 2. Valve flap for the double-plate truss flow, flow resistance is small, to improve the flow of media Efficiency and thus save the pump electricity and operating efficiency, PN6 was a single flat Plate type. 3. Valve seat with stainless steel, with a special bonding agent fixed to the valve body; The valve seal is embedded in the serrated form directly with rubber Buttocks or bolts fixed, so have a simple structure, good sealing and so on Features. 4. Use the US patent design withdrawal pin structure to replace the shaft and the valve between the keys Connection structure, in addition to the parts can be interchangeable and can be close to the valve shaft valve flap Together without gaps, not loose. 5. Do not remove the valve shaft from the valve, the valve can replace the ring. 6. The bearings of the valve shaft are self-lubricating bearings, the friction resistance is small in operation, And no oiling. 7. Valve seal ring and valve body on the contact interface up to about ± 1 ℃ Without leaking. Main Specifications: Nominal diameter (mm) DN350-DN2600 Nominal pressure PN6 PN10 PN16 Maximum working pressure MPa 0.6 1 1.6 Seal test pressure MPa 0.66 1.1 1.76 Strength Test pressure MPa 0.9 1.5 2.4 Applicable medium water, sewage Medium temperature ≤ 65 ℃ Medium flow rate ≤ 3M / S Source: China Butterfly Valve Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

Flange fixed ball valve, flanged gate valve, flanged butterfly valve and oxygen pressure reducing valve is belong to one type of valve, the difference in its closure is a ball, the ball around the center line of the body as a rotation to achieve a kind of open and close the valve. The ball valve is mainly used in the pipeline to cut off, distribute and change the flow direction of the medium. Ball valve is a new type of valve widely adopted in recent years. A, flange fixed ball valve has the following advantages: 1. Fluid resistance is small, and its drag coefficient is equal to that of the same length. 2. Simple structure, small volume and light weight. 3. Close and reliable, the ball valve sealing material is widely used in plastic and sealing, and has been widely used in vacuum system. 4. Easy to operate, open and close quickly, from open to close just rotate 90 °, is advantageous for the remote control. 5. Easy to maintain, ball valve structure is simple, sealing ring is generally active, remove and replace are convenient. 6. The sealing surface of the ball and seat is separated from the medium during full or closed, without causing the valve sealing surface to be eroded by the medium through. 7. Wide range of applications, ranging from small to several millimeters, large to several meters, from high vacuum to high pressure. When the ball is rotated 90 degrees, the ball should be fully presented at the entrance and exit, thus cutting off the flow. B, flange fixed ball valve works as follows: The opening process 1 in the closed position, the ball is pressed by the stem of the stem [wiki] mechanical [/ wiki], pressed against the seat. When rotating the handwheel counterclockwise, the stem moves in the opposite direction, and its bottom corner plane causes the sphere to unseat. The stem continues to lift and interacts with the guide pin in the stem spiral groove to cause the ball to spin without friction. Until full open position, the stem is lifted to the limit position and the ball is rotated to the full open position. C, fixed ball valve closing process When closing, turn the handwheel clockwise and the stem begins to drop and cause the ball to turn away from the seat. 2 continue to rotate the handwheel, the valve stem is embedded in the spiral groove on the role of the guide pin, the stem and ball rotate 90 ° at the same time. 3 is close to closing, the sphere has been without contact with the valve seat rotated 90 °. In the final lap of the handwheel, the Angle plane at the bottom of the stem is mechanically wedged into the oppressing sphere, pressing it tightly against the seat to reach a complete seal. D, the structural features of flange fixed ball valve: 1. There is no friction between the opening and closing. This feature completely solves the problem that the traditional [wiki] valve [wiki] has been affected by friction between the covers. 2. Coat structure. The valve can be checked and repaired directly on the pipe, which can effectively reduce the parking and reduce the cost. 3. Single seat design. Eliminates the problem that the valve medium cavity is affected by abnormal pressure. 4. Low torque design. Specially designed stem with a small hand wheel valve can easily open and close. 5. Wedge-shaped seal structure. Valve by valve stem provides mechanical force, wedge pressure the ball into the seat and seal, make the valve’s sealing is not affected by changes in the pipeline pressure difference, under various conditions sealed performance has a reliable guarantee. 6. Self-cleaning structure of sealing cover. When the ball tilting away from the seat, fluid in the pipeline along the sphere uniform sealing surface into 360 ° through, not only eliminates the high velocity on the seat of local scour, also washed away by the accumulated on the surface of the sealing material, achieve the goal of the clean. Source: China Ball Valve Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

The type of gate valve, according to the sealing surface configuration can be pided into wedge-type gate valve and parallel gate valve, wedge gate valve can be pided into: single-pole, double-plate and flexible plate type; parallel gate valve Divided into single-gate and double-plate type. According to the stem of the threaded position can be pided into two types of gate valve and dark bar gate valve. When the valve is closed, the sealing surface can only rely on the media pressure to seal, that is, rely on the media pressure to the gate of the sealing surface to the other side of the valve seat to ensure that the sealing surface of the seal, which is self-sealing. Most of the gate valve is forced to seal, that is, when the valve is closed, to rely on external force forced to the gate pressure to the valve seat to ensure that the sealing surface of the seal. Gate valve with the stem with a straight line movement, called the lift bar gate valve (also called the gate valve). Usually in the lift bar with trapezoidal thread, through the top of the valve nut and the valve body on the guide groove, the rotary motion into a linear motion, that is, the operating torque into the operating thrust. When the valve is opened, when the height of the gate is equal to 1: 1 times the diameter of the valve, the fluid channel is completely open, but this position can not be monitored during operation. The actual use of the stem is the vertex as a sign, that is, the location of the open, as its full open position. In order to consider the temperature changes appear locking phenomenon, usually in the open to the vertex position, and then back 1 / 2-1 circle, as the full valve position. Therefore, the valve fully open position, according to the position of the gate (ie stroke> to determine. Some gate valve, stem nut set on the gate, hand wheel rotation to drive the stem rotation, leaving the gate to lift, this valve is called the rotary bar gate valve or called the dark bar gate valve. Manual gate valve works: Turn the handwheel through the handwheel and the stem of the thread into the retreat, lift or drop the valve plate connected to the valve stem to achieve the opening and closing effect Gate valve has the following advantages: Fluid resistance is small, the sealing surface by the media brush and erosion of small. Open and close more effort. Media flow is unrestricted, no spoiler, no pressure reduction. Simple shape, short structure length, good manufacturing process, wide application. The drawbacks of the gate valve are as follows: Sealing between the easy to cause erosion and abrasion, maintenance more difficult. Large size, open need some space, open and close a long time. Structure is more complex. Gate type, according to the sealing surface configuration can be pided into wedge-type gate valve and parallel gate valve, wedge gate valve can be pided into: single-gate, double-gate and flexible plate-type; parallel gate valve Can be pided into single-gate and double-plate type. According to the stem of the threaded position can be pided into two types of gate valve and dark bar gate valve. Gate valve installation and maintenance should note the following: Hand wheel, handle and transmission are not allowed to be used for lifting, and is strictly prohibited collision. The double gate valve should be mounted vertically (ie, the stem is in the vertical position and the hand wheel is at the top). Valve valves with bypass valves should be opened before opening the bypass valve (to balance the inlet and outlet pressure and reduce the opening force). The gate valve with drive mechanism is installed according to the instruction manual of product. If the valve is often used for switching, lubricate at least once a month. Structural features: For a long time the general use of the market gate valve leakage or rust phenomenon, the introduction of the European high-tech rubber and valve manufacturing technology produced by the elastic seat closure valve, to overcome the general valve seal bad, rust and other defects, The sealing valve uses the elastic gate to produce the slight elastic deformation compensation effect to achieve the good sealing effect, the valve has the switch light, the seal is reliable, the elastic memory is good and the service life and so on the remarkable merit. Can be widely used in tap water, sewage, construction, petroleum, chemical, food, medicine, textile, electric power, shipbuilding, metallurgy, energy systems and other pipelines as a regulator and shut-off device. Gate valve construction (features): Light weight: the body made of high-grade black cast iron, the weight of the traditional valve weight reduction of about 20% to 30%, easy installation and maintenance. Flat gate: the traditional gate valve is often in the water after the washing tube because of foreign objects such as stone, wood, cement, iron, debris and other silt in the bottom of the groove, easy to cause close to the formation of water leakage phenomenon, Elastic seat seal valve at the bottom with the same pipe with the flat design, not easy to cause debris deposition, so that fluid unimpeded. The overall package of plastic: the use of high-quality rubber plate for the whole body, outsourcing plastic, the European first-class rubber vulcanization technology makes the curing of the gate to ensure accurate geometric dimensions, and rubber and ductile castings and then firmly, Elastic memory good. water Casting body: the valve body with precision casting, accurate geometry makes the valve body without any finishing to ensure that the valve seal. Gate valve has the following advantages: 1, the fluid resistance is small, the sealing surface by the medium brush and erosion small. 2, opening and closing more effort. 3, the media flow is not restricted, no spoiler, do not reduce the pressure. 4, simple shape, short structure length, manufacturing process is good, for a wide range. The drawbacks of the gate valve are as follows: 1, between the sealing surface can cause erosion and abrasion, maintenance more difficult. 2, larger size, open need some space, open and close a long time. 3, the structure is more complex. Gate type, according to the sealing surface configuration can be pided into wedge-type gate valve and parallel gate valve, wedge gate valve can be pided into: single-gate, double-gate and flexible plate-type; parallel gate valve Can be pided into single-gate and double-plate type. According to the stem of the threaded position can be pided into two types of gate valve and dark bar gate valve. Gate valve installation and maintenance should note the following: 1, hand wheel, handle and transmission are not allowed to make lifting, and is strictly prohibited collision. 2, double gate valve should be installed vertically (that is, the stem in the vertical position, hand wheel at the top). 3, with a bypass valve valve should be opened before opening the bypass valve (to balance the import and export pressure and reduce the opening force). 4, with the transmission mechanism of the gate valve, according to the provisions of the product manual installation. 5, if the valve is often used to switch, at least once a month lubrication. Source: China Gate Valve Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

Diaphragm valve is a special form of shut-off valve, the opening and closing pieces is made of a soft material with the diaphragm, which will valve body cavity and the valve cover cavity separated. The diaphragm is actually a “clamped” valve, a resilient, disturbable diaphragm connected to the compression element by means of a screw, which is operated by the stem and moved up and down. When the compression element is raised, the membrane (If it is a weir valve) or pressed at the bottom of the contour (if it is straight-through type), the diaphragm valve is suitable for switching and throttling, and the diaphragm is pressed against the valve weir Use. The structural design of the diaphragm itself is particularly suitable for ultra-pure media or heavily polluted, very viscous liquid, gas, corrosive or inert media. When combined with a control device, the diaphragm valve replaces other conventional control systems, especially for solid and easily contaminated inert media. Products are mainly used in the production of bio-pharmaceuticals, foodstuffs, foodstuffs, and electricity, chemical, electroplating, and other industries. They are also used in the production of semiconductor wafers. Diaphragm valves are particularly suitable for transport corrosive and sticky Of the fluid, such as mud, food, pharmaceutical, weaving adhesive, etc., because the pipeline, the diaphragm operating mechanism is not exposed to the transport fluid, it is not polluting, do not need packing, stem packing It can not leak. The most prominent feature is the diaphragm to the lower part of the valve body cavity and the upper valve cover cavity separated, so that the diaphragm above the stem, disc and other parts from the media corrosion, eliminating the filler seal structure, and will not produce media leakage The 1, the use of rubber or plastic and other soft seal made of the diaphragm, good sealing. As the diaphragm for the wearing parts, depending on the characteristics of the media and regular replacement. 2, by the diaphragm material restrictions, diaphragm valve for low pressure and temperature is relatively low occasions. 3, diaphragm according to the structure can be pided into: house, DC, cut-off, straight-through, gate and right angle six; connection form is usually flange connection; by drive can be pided into manual, electric and pneumatic Three, of which pneumatic drive is pided into normally open, normally closed and reciprocating three. 4. It is not appropriate to use in pipelines with temperatures above 60 ° C and for transporting organic solvents and strong oxidizing media, and should not be used in higher pressure piping Diaphragm valve is in the 1.3 × 10-5 ~ 2.5X106Pa fluid system used to open or block the air flow of the valve. Source: China Diaphragm Valve Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

The flanged diaphragm valve is a special type of truncated valve that appeared in the 1920s. Its opening is a membrane made of soft material. Separate the body cavity from the bonnet and the drive part, hence the diaphragm valve. The characteristics of flanged diaphragm valve are as follows: The most prominent feature is the lower part of the diaphragm valve body cavity and the upper cover inner chamber is separated, the located above the diaphragm of the stem and disc parts from corrosion medium, such as eliminating the packing seal structure, and won’t produce leakage of medium. 1. Use rubber or plastic to seal the diaphragm, sealing better. Since the diaphragm is a vulnerable part, it should be replaced regularly with the characteristics of the medium. 2. Limited by diaphragm material, diaphragm valves are suitable for low-pressure and relatively low-temperature occasions. 3. The diaphragm valve can be pided into three types: house type, direct current, cut-off, straight-through type, gate type and right Angle; The form of connection is usually flange. The driving mode can be pided into three kinds: manual, electric and pneumatic. The aerodynamic drive is pided into three types: regular, closed and reciprocating. 4. It should not be used in pipelines with high temperature above 60 degrees and conveying organic solvents and strong oxidizing medium Diaphragm valves are used to open or block airflow in a fluid system of 1.3 x 10-5 ~ 2.5 X106Pa. Main performance of flanged diaphragm valve Leakage rate: no more than 1.3 times 10-5pa. L/S; Materials: 304, 316L; Working medium: gas, water, oil; Working temperature: fluorine rubber – 30 ℃ ~ + 150 ℃; Principle of flanged diaphragm valve: to drive the drive screw with compressed air, make the valve core move up and down, and move the diaphragm up and down to close and open it. Features: compact, simple, small size, beautiful appearance; The switch is guided and stable. The closing moment is small and the life span is greater than 300,000 times. The diaphragm pressure can be adjusted automatically, with uniform pressure and reliable sealing. The diaphragm loading valve core adopts push-in type and convenient replacement. 1. The valve is composed of valve body, bonnet, stem, disc, diaphragm and other driving parts. 2. The opening and closing of the valve is driven by the connecting shaft of the electric device to drive the stem nut, so that the valve stem can be used to drive the disc lift and lift when the shaft is moving. 3. When the power supply failure and interrupts, and are in urgent need of the emergency conditions of opening and closing of the valve, first of all, should be “hand – electric switch handle” convert to engraved with manual marking position, then can flash by rotating the handwheel door opening and closing. When rotating clockwise, the valve can be closed. Instead, it opens. 4. When the electric operation is to be restored, the switch handle must be transferred to the position of the electric marking, before the electric operation can be carried out. maintenance and installation use precautions 1. The valve should be stored in a dry and ventilated room, which is strictly prohibited. 2. The access end of the inventory valve must be sealed to prevent the foreign body from entering the inner cavity and damage the sealing part. And avoid contact with oil or other flammable materials. 3. The metal surface of this valve should be removed from dirt and coated with anti-rust agent. 4. Do not brush grease material on the surface of rubber layer or rubber diaphragm to avoid rubber swelling and affect valve service life. 5. Rotate the handwheel counterclockwise during the period of storage or during the outage to keep the valve in a microstate and avoid the loss of elasticity due to prolonged compression. 6. During transportation or installation, the sling shall not be attached to the handwheel or stem. It is forbidden to strike against other metals or hard objects in case of damage to parts and lining. String 6 7. Prior to installation, the operating conditions and media of the pipeline shall be carefully checked to conform to the applicable scope of the provisions of this valve, so as to avoid unnecessary losses caused by improper selection, which is caused by accidents. 8. This valve shall not be used for vacuum tube road, but it shall be installed in two directions at any position in the pipeline, but it shall be convenient for operation and maintenance. 9. When installing, clean the valve body cavity, prevent fouling or damage sealing parts, and check whether the connecting bolts of each part are even fastening. 10. The parts that are in contact with the medium must be constantly checked in operation, and the damaged parts are replaced regularly according to the actual usage. 11. When changing the diaphragm, be careful not to tighten the diaphragm too tightly or too loose. 12. The valve shall be cleaned and exposed to the medium to extend the service life during the period of discontinued use. 13. When operating the vertical valve manually, it is not allowed to open the valve with auxiliary lever to avoid excessive torque and damage to the driving part or sealing part. 14. After repair, the valve shall be sealed in accordance with the relevant test requirements before application. And make a maintenance note not to prepare for the examination. Source: China Flanged Diaphragm Valve Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

Now the stainless steel pipe fittings also have a lot of products, in the face of such a situation we want to identify the true and false stainless steel fittings, and now you can use some chemical syrup to identify some of the characteristics of stainless steel, and thus to identify the stainless steel pipe fittings are also good or bad Methods as below: 1, we all know that stainless steel pipe has a strong magnetic, non-magnetic or weak magnetic some of the characteristics of stainless steel is non-magnetic steel, but after a large pressure cold processing will have a mild magnetic; pure chrome steel and low alloy steel has a strong Magnetic steel. 2, another significant feature of stainless steel is the most concentrated nitric acid and dilute nitric acid has a certain degree of corrosion resistance, can be very intuitive to distinguish between stainless steel and other metals. 3, sulfuric acid test sulfuric acid immersion test can 302 and 304 and 316 and 317 stainless steel pipe to distinguish. The trimming of the sample should be finely ground and then washed and passivated for half an hour in nitric acid at a concentration of 20 to 30% and at a temperature of 60 to 66 ° C. 4, in addition to the use of nitric acid can also be used to distinguish between ordinary copper carbon and all the ordinary stainless steel. As long as the concentration of 5 to 10% of the copper sulfate solution can clearly see the difference between the two, ordinary carbon steel in the copper sulfate solution will form a surface copper, and then the surface of stainless steel is not There are other reactions, of course, before doing this experiment to clean up the carbon steel, to remove grease or a variety of impurities, and polished with a soft grinding a small area. Source: China Pipe Fittings Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

Stainless steel head due to the surface and the heart of the cooling rate and time of the inconsistency, thermal stress. Stainless steel head under the action of thermal stress to make the workpiece surface pressure and the heart of the stretch. This phenomenon is affected by cooling rate, material composition and heat treatment process and other factors. In the process of heat treatment, the change of the volume of the workpiece is caused by the change of the volume of the workpiece due to the change of the organization, that is, the transformation of the austenite to the martensite. The change of the volume of the workpiece is caused by the change of the volume of the workpiece. The ultimate result of the stress change of the stainless steel head is the tensile stress of the surface layer, the compressive stress of the heart, and the opposite of the thermal stress. The size of the tissue stress is related to the cooling rate, shape, chemical composition of the workpiece in the martensitic transformation zone. Thermal stress has produced a stainless steel head before the transformation of the organization, and the tissue stress is generated during the process of tissue transformation. The result of the combined effect of thermal stress and tissue stress during the whole cooling process is the actual stress in the workpiece The The combined effect of these two stresses is very complex and is influenced by many factors such as composition, shape, heat treatment and so on. There are only two types of developmental processes, namely, thermal stress and tissue stress, the opposite direction of action when the two offset, the role of the same direction when the two are superimposed on each other. Source: China Stainless Steel Head Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

Electromagnetic valve of many kinds of materials, pided into brass, cast steel and stainless steel. This paper mainly introduces the electromagnetic valve of stainless steel material, which is mainly made of 316L stainless steel in daily life, sometimes called the 316L stainless steel or titanium. As everyone knows, the material property is determined by the composition of its chemical composition, so the first to understand the chemical composition of 316L stainless steel and the proportion of each component, the following figures are calculated according to the percentage composition, Si = 1, Mn = 2, Cr:16-18, S = 0.03, P = 0.035, C = 0.03, Ni:10-14. Mo:2.0-3.0. The above chemical composition of 316L stainless steel solenoid valve provides excellent resistance to high temperature and corrosion resistance, so the 316L stainless steel solenoid valve is mainly high temperature solenoid valve and anti-corrosion solenoid valve. Material for 316L stainless steel high temperature solenoid valve, can be at medium temperature below 700 degrees C scene long action, but also in 1500 C medium temperature short time action. Material 316L stainless steel corrosion protection solenoid valve, in the normal temperature of sulfuric acid, hydrochloric acid and sea water medium and long-term action, or high temperature environment in some corrosive medium short-term action. Also made of 316L stainless steel solenoid valve also has a merit, ordinary stainless steel after welding, usually by annealing steps, but the corrosion prevention solenoid valve 316L stainless steel without this process, save time and cost. 316L stainless steel because the chemical composition of the metal element molybdenum, so in terms of performance, 316L stainless steel is far stronger than 310 and 304 stainless steel, at the same price, 316L stainless steel is also more expensive than 310 and 304 stainless steel. But the strong corrosion resistance of 316L stainless steel in high temperature, such as sulfuric acid concentration percentage to more than 85% or less than 15%, 316L stainless steel solenoid valve can be normal operation, so 316L stainless steel is widely used in the field of electromagnetic valve. Source: China Electromagnetic Valve Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)