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Wafer Check Valve

The dual-plate wafer 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.…
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产品简介
The dual-plate wafer 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.
技术特点

  • The dual-plate wafer check valve consists of a valve body, discs, shaft, and springs, featuring a wafer-style connection for a compact

    structure.

  • The butterfly plates are two semicircles, using spring-forced resetting. The sealing surfaces can be made from wear-resistant material

    welded onto the body or lined with rubber, offering a wide range of applications and reliable sealing.

  • The closing stroke of the valve disc is short, and it is spring-loaded for quick closure, which can significantly reduce water hammer

    phenomena.

  • Suitable for installations in spaces with limited access; it can be used in both horizontal and vertical pipelines and is easy to install.

  • Applicable for various mediums including water, steam, oil products, nitric acid, acetic acid, and strong oxidizing agents.

  • The product features a small size, light weight, sensitive action, reliable sealing, easy installation, and a long service life.


规格参数

  • Material: Carbon Steel, Stainless Steel, Alloy Steel

  • Nominal Size: NPS 2"~ 64", DN 50~1600

  • Pressure Rate: Class 150~2500, PN 10~420

  • Temperature Range: -46°C~+200°C◎ 

  • Application range: Suitable for pipelines in various working conditions such as petroleum, chemical, pharmaceutical, fertilizer, power industry, and low temperature.



技术规范

◎ Design Standard: API 6D, ASME B16.34, GB/T 12236

◎ Pressure Temperature Rate: ASME B16.34, GB/T 12224

◎ Face to Face: ASME B16.10, GB/T 12221, EN558

◎ Flange Standard: ASME B16.5, ASME B16.47, GB/T 9113, JB/T 79, HG/T 20592, EN 1092, GOST 33259

◎ Pressure Test: API 598, API 6D, GB/T 13927, JB/T 9092, GOST 9544


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