● 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.
◎ 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
◎ Fire Safe: API 607
◎ Pressure Test: API 598, API 6D, GB/T 13927, JB/T 9092, GOST 9544
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.
The structure is simple & compact with: smooth flow passages, high accuracy in flow characteris- tic curves, stable & reliable, economically practical, and easy to maintain. Based on a conventional type, it is designed and developed through modular extension which is capable of producing special structures such as: the C7 series angle type single-seat valve, bellows seal single-seat valve, and insulated jacket type single-seat valve for user selection.
When the disc of the lift check valve slides along the vertical center line of the valve body and the medium flows forward, the disc is lifted by the fluid thrust and the medium passes smoothly; When the medium stops flowing or reverse flowing, the valve disc quickly closes under the action of its own gravity and the reverse thrust of the fluid to prevent the medium from flowing back. This valve is usually equipped with a guide sleeve to ensure that the disc remains smooth during lifting and accurately falls back onto the seat.
The Double Gate Sampling Valve is an efficient valve specifically designed for industrial sampling. It features a double-gate structure that ensures reliable sealing and precise sampling control. The unique double-gate design guarantees stable media flow during the sampling process while effectively preventing leakage and contamination. This valve is widely used in industries such as chemical and pharmaceutical, especially for sampling inspections in reactors under crystallization conditions.