● The length of the structure is short series, the valve is light in weight, and the pipe support frame can be saved.
● The valve in the process of opening and closing the gate can scrape off the attached medium by itself, which is conducive to sealing.
● Knife gate is conducive to cutting off the medium, slagging, valve operation unblocked.
● Valve adopts clamp connection. Wedge limit provides sealing force and reliable sealing.
● Wear-resistant bushings of different materials can be provided according to requirements to extend the service life of the valve.
● Drive device (electric, gearbox, pneumatic, hydraulic) can be optional.
Material: Carbon steel, low-temperature carbon steel, stainless steel, duplex steel, etc
Nominal Size: NPS2～NPS36,DN50～DN900
Pressure Rate: 0.25～5MPa
Temperature Range: -46～200℃
Operator: Handwheel, Umbrella Wheel, Pneumatic, Electric, Hydraulic, Electro Hydraulic, Chain Wheel
Application range: Suitable for mud, pulp, urban sewage treatment, sugar factory, powder, paper, medicine, chemical industry and other fields.
◎ Design Standard: MSS SP-81,JB/T 8691
◎ Pressure Temperature Rate:ASME B16.34,GB/T12224
◎ Face to Face: ASME B16.10,GB/T12221,MSS SP-81
◎ Flange Standard: ASME B16.5,ASME B16.47,MSS SP-81,GB/T9113
◎ Butt Weld Standard: ASME B16.25,GB/T12224,GB/T12224
◎ Fire Safe: API6Fa
◎ Pressure Test: MSS SP-81,API 598
The cryogenic butterfly body can be provided in two structural forms, namely flange connection and butt. welding connection (both with inspection ports). The body with inspection ports can replace the valve internals online, making maintenance work extremely simple, which is conducive to the rational use of resources and saving maintenance costs. The extended valve cover + drip tray design ensures that the temperature at the stuffing box is above zero degrees, so that the connection between the stuffing and the stem will not freeze and lock. Through the use of three-dimensional simulation optimization design, effective control of material changes under cryogenic conditions, selection of high-quality materials and effective processing technology to meet the stable performance of materials under cryogenic conditions. This series of valves has good sealing performance, high reliability, light weight, compact structure, and no need toworry about abnormal increase in valve cavity pressure. lt isan ideal valve for conveying cryogenic media and can bewidely used in cryogenic conditions in liquefied natural gas,aerospace and other fields.
The dual plate check valve features two semicircular, spring-loaded valve discs mounted on a central vertical pivot. When the valve opens, the force of the fluid and the spring act at the center of the disc, causing it to open from the base first. This design minimizes wear on the seal during opening, enhancing its durability. As the flow decreases, the discs slowly move back towards the seat due to the spring's force, ensuring a gradual closure. During backflow, the increased force on the discs leads to a faster closure, effectively reducing the risk of water hammer and hydraulic shocks. The spring’s force closes the top end of the disc first, preventing damage at the disc's base and prolonging the seal's lifespan.
Designed specifically for deep-cold media such as LNG and liquid oxygen, this valve features an austenitic stainless steel body that undergoes special deep-cold treatment to ensure reliable sealing and operational performance under extreme conditions of -196℃. The valve stem adopts an extended neck design and is equipped with a vacuum insulation structure, effectively blocking the transmission of cold energy. The valve can be equipped with either a flat seal or a conical seal structure, allowing for selection based on different pressure ratings, and is suitable for precise flow control in liquefied natural gas storage and transportation, air separation equipment, and low-temperature chemical systems.