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Gate valve
Product classification of Meiyan One Pump Valve
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- ShangHai Meiyan Yi Pump & Valve Co.,LTD.
- Sales hotline：
+86 21 5640 2009 - Pump customer service：
+86 138 1691 3072 - Valve customer service：
+86 1381 6913 072 - E-mail：
my1pv@1bengfa.com
Gate valve
Gate valves are mainly valves that use gate plates as opening and closing components and move vertically along the axis of the valve seat to achieve opening and closing actions. The main advantages of gate valves are smooth flow channels, low fluid resistance, and low opening and closing torque; The main disadvantages are that the sealing surface is prone to scratches, the opening and closing time is long, and the body shape and weight are large. The gate valves produced by Shanghai Meiyanyi Pump Valve are widely used in pipelines, and the developed large-diameter gate valves can reach 1200mm. The characteristic of a rising stem gate valve is that the valve stem drives the gate to rise and fall together, and the transmission thread on the valve stem is exposed outside the valve body. Therefore, the opening and closing position of the valve can be intuitively determined based on the direction and position of the valve stem movement, and the transmission thread is easy to lubricate and not corroded by fluids, but it requires a large installation space. On the contrary, the transmission thread of the concealed stem gate valve is located inside the valve body, and during the opening and closing process, the valve stem only rotates without moving (the gate moves up and down inside the valve body). Therefore, when the valve is opened, the height dimension of the valve is small, requiring only a small installation space. Hidden stem gate valves are usually equipped with switch position indicators above the valve cover, which are suitable for environments with small spaces and high dust content such as ships and pipe trenches. Gate valves are also available in various models and specifications, including double gate and single gate, wedge gate and flat gate, soft seal and hard seal, electric and hydraulic, and knife gate valves. The following pictures are for reference only.
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Wedge Gate Valve
Wedge gate valve refers to a gate valve whose gate plate (opening and closing member, also known as valve disc) is a wedge-shaped inclined plate. From the force analysis of the wedge-shaped gate plate, it can be seen that the downward thrust of the valve stem decomposes into positive pressure on the sealing surface of the valve seat. The sealing surfaces on both sides of the wedge-shaped gate plate are respectively sealed with the valve seats on both sides. The inverted T-shaped groove of the gate plate and the valve stem are flexibly connected, which can compensate for the errors caused by processing and better fit the sealing surface of the gate plate and the sealing surface of the valve seat, completing the sealing. Shanghai Meiyan Yi Pump Valve produces wedge type single gate valves, wedge type double gate valves, and wedge type elastic gate valves. The wedge-shaped gate leaves the valve seat at the moment of opening, reducing wear on the sealing surface with the valve seat. The sealing surface of a wedge gate valve is generally welded with high hardness materials such as cobalt based alloys and hard alloys to improve its high-temperature performance, fatigue resistance, corrosion resistance, and sealing surface hardness.View details>>
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Flat Gate Valve
Flat gate valve refers to a sliding valve with a parallel gate plate (closing element), which can be a single gate plate or a double gate plate with an opening mechanism in between. The pressure of the gate plate against the valve seat is controlled by the medium pressure acting on the floating gate plate or floating valve seat. If it is a double gate flat gate valve, the expansion mechanism between the two gate plates can supplement this clamping force. According to the gate structure, flat gate valves can also be divided into flat gate valves with guide holes and flat gate valves without guide holes. Balance plate valves with guide holes are used for the main pipelines transporting oil and natural gas. For pipelines without sweepers, flat gate valves without guide holes can be used. The flow channel of the flat gate valve body can be divided into full bore form, which has the advantages of low pressure loss; The advantage of the reduced diameter Venturi structure gate valve is that it can reduce the size of the valve disc and seat, decrease the weight of the gate valve, and reduce the opening and closing force or torque for gate valves of the same specification.View details>>
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Electric gate valve
Electric gate valve refers to a gate valve equipped with an electric actuator. Electric actuators for gate valves are generally multi turn, with switch type and intelligent type, as well as indoor and outdoor types, and can be controlled by current or voltage. Various types of soft seal gate valves, hard seal gate valves, wedge gate valves, or flat gate valves can all be electrically controlled. Soft sealed electric gate valves are commonly used in building water supply and drainage systems as well as fire protection systems. By controlling the soft sealed electric gate valves, precise control of the flow and distribution of various media in the building can be achieved, ensuring the water needs of users. The hard sealed electric gate valve produced by Shanghai Meiyan Yi Pump Valve can withstand significant pressure shocks and is suitable for high pressure and high temperature environments. It is widely used in industrial fields such as chemical, petroleum, papermaking, and food industries to control the flow rate of various media and pipeline switch control, ensuring the normal operation of the production process.View details>>
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Pneumatic Gate Valve
Pneumatic gate valves mainly consist of gate valves, linear pneumatic actuators, pneumatic triplets, and limit switches. Due to the structural form of gate valves, linear pneumatic actuators that are matched with gate valves are generally double acting or can be equipped with manual devices. The opening and closing of the pneumatic gate valve produced by Shanghai Meiyan Yi Pump Valve is driven by compressed air. When the gate valve is closed, the sealing surface can also be sealed by the medium pressure, that is, the sealing surface of the gate is pressed against the sealing surface of the valve seat on the other side by the medium pressure to ensure the sealing of the valve sealing surface. But most gate valves still use forced sealing, which means that when the valve is closed, external force must be used to forcefully press the gate plate against the valve seat to ensure the sealing performance of the sealing surface.View details>>
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Forged steel gate valve
Forged steel gate valve refers to the valve body, valve cover, valve disc and other valve materials that are forged, including forged steel and forged stainless steel materials. Forged gate valves are more suitable for high pressure, high temperature and corrosive working conditions. The opening and closing component of forged steel gate valves is the gate plate (also known as the valve plate or disc), and the direction of movement of the gate plate is perpendicular to the direction of the fluid. Forged steel gate valves can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate of forged steel gate valve has two sealing surfaces, and the most commonly used mode gate valve forms a wedge shape with the two sealing surfaces, and the wedge angle varies with the valve parameters. The forged steel gate valves produced by Shanghai Meiyan Yi Pump Valve are mainly American standard API forged steel gate valves, which can be configured with manual, pneumatic, electric, pneumatic hydraulic linkage, etc. Welcome new and old customers to make purchases.View details>>
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Stainless Steel Gate Valve
Stainless steel gate valves mainly refer to gate valves produced and processed from stainless steel 321, 304, 304L, 316, 316L, duplex stainless steel, and various forged stainless steel materials. They are mainly suitable for pipeline equipment with strong corrosion resistance or anti-corrosion requirements in various industries such as chemical, chemical, and new energy. The opening and closing component of a gate valve is the gate (valve plate or disc), and the direction of movement of the gate is perpendicular to the direction of the fluid. Gate valves can only be fully opened and fully closed, and generally cannot be used for regulation and throttling. The stainless steel gate valves produced by Shanghai Meiyan Yi Pump Valve include stainless steel flange gate valves, stainless steel threaded gate valves, forged stainless steel gate valves, American standard stainless steel flange gate valves, etc. There are many types with excellent quality. Welcome to choose.View details>>
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Soft Seal Gate Valve
Soft sealed gate valve refers to a gate valve whose opening and closing parts, such as valve disc and valve plate, are completely covered with rubber on the outer surface. It is mainly used in the pipeline equipment of water supply and drainage fields such as buildings, fire protection, and water plants in urban construction. The soft sealed gate valves produced by Shanghai Meiyan Yi Pump Valve are divided into two types: rising stem soft sealed gate valves (when the valve is opened and closed, the valve stem can be seen to rise or fall) and hidden stem soft sealed gate valves (when the valve stem rotates, the valve stem cannot be seen to rise or fall, and the gate inside the valve will rise or fall with the valve stem screw). Usually, there are trapezoidal threads on the lifting rod, and through the nut in the middle of the gate and the guide groove on the valve body, the rotational motion is converted into linear motion, that is, the operating torque is converted into operating thrust.View details>>
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Knife Gate Valve
Knife gate valve is a relatively new type of valve that was introduced to China in the 1980s. The gate of knife gate valve is shaped like a knife, and when closed, the sealing surface can be sealed only by the medium pressure, that is, the sealing surface of the gate valve is pressed against the sealing surface of the valve seat on the other side by the medium pressure to ensure the sealing of knife gate valve, which is equivalent to having self sealing function. However, the pressure of the valve is generally below PN16. There are many driving methods for knife gate valves produced by Shanghai Meiyanyi Pump Valve, such as manual, chain wheel, electric, pneumatic, hydraulic, umbrella gear, electrically controlled hydraulic, and pneumatic hydraulic. Ultra thin knife gate valves are widely used in mining sites, coal washing sites, steel industry coal washing pipelines, slag slurry pipelines, ash discharge pipelines, etc. due to their advantages of small volume, low flow resistance, light weight, easy installation, and easy disassembly.View details>>
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Slurry Valve
A slurry valve is an opening and closing device used to divert and merge or switch the flow direction of high concentration slurry such as mud, mixed liquid, and fiber media. The knife type slurry valve has the characteristics of lightweight, simple and compact structure, reliable sealing performance, low fluid resistance, and long service life in special environments. The connection forms of the slurry valve include clamp type and flange ear type, and the sealing forms include metal to metal hard seal, metal to polyurethane, and reinforced polytetrafluoroethylene soft seal. The slurry valve transmission methods produced by Shanghai Meiyanyi Pump Valve include manual (handwheel, manual zipper), worm gear transmission (spur gear transmission, bevel gear transmission), pneumatic, electric, hydraulic, etc. It is widely used in coal chemical, petrochemical, rubber, papermaking, pharmaceutical and other pipelines for the diversion and merging of high concentration media or flow direction switching.View details>>
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Special purpose gate valve
Special purpose gate valves refer to gate valves designed specifically for various industrial processes and special working conditions, such as laser welding special gate valves, asphalt special insulation gate valves, Z744TC+PU double gate double seal slurry valves, intelligent variable frequency electric gate valves, and ultra-high sulfur resistant gate valves. Special gate valve is a type of valve used for special working conditions and environments, with specific structures and materials to meet specific needs. For example, gate valves commonly used in harsh environments such as high temperature, high pressure, and corrosive media are designed and material selected with special consideration to ensure long-term stable operation. Shanghai Meiyan Yi Pump Valve can produce various special gate valves with special structural designs according to specific application needs, all of which have special sealing designs or structures. Special gate valves have a wide range of applications, including but not limited to: oil and gas industry: used to control high-pressure and high-temperature oil and gas pipelines; Chemical industry: Processing corrosive chemicals to ensure production safety; Power industry: used to control the flow of steam and water in thermal and nuclear power systems; Metallurgical industry: Processing high-temperature molten metals and other high-temperature media.View details>>
Contact us
- Sales hotline：
+86 21 5640 2009 - Pump customer service：
+86 138 1691 3072 - Valve customer service：
+86 1381 6913 072 - E-mail：
my1pv@1bengfa.com
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