API 594 Dual Plate Check Valve, ASTM A351 CF8M, 4 IN, 150 LB

Product Name: API 594 Dual Plate Check Valve
Type: Wafer Check Valve
Design Standard: API 594
Body Material: ASTM A351 CF8M
Size: 4 Inch, DN100
Pressure: Class 150 LB, PN20
End Connection: Wafer Ends

We specialize in manufacturing wafer check valves with a unique center vertical pin shaft design. When the valve opens, the fluid's resultant force acts on the center of the disc's sealing face, while the counteracting spring force is applied to the center of the disc surface. This design ensures that the root of the disc opens first, reducing wear on the sealing surface, a common issue in traditional valves. This feature enhances the longevity and performance of the valve seal. The wafer check valve automatically opens and closes based on the flow of the medium, serving as an effective solution to prevent reverse flow in piping systems.

Technical Specifications

» Nominal Diameter: NPS 2–60 Inch (DN50–DN1500)
» Temperature Range: -29°C to 595°C
» Design Pressure: Class 150–2500 (PN10–PN420)
» Materials: ASTM A216 WCB, WCC, A217 WC6, WC9, C5, C12A, A352 LCB, LCC, A351 CF8, CF8M, CF3M, CF8C
» End Connections: Wafer, Lug, Clamp, Flanged
» Design and Manufacture Standards: API 594, API 6D, JB/T 8937
» Face-to-Face (End-to-End): API 594, API 6D, JB/T 8937, DIN 3202
» Flanged Connection Standards: ANSI B16.5, DIN 2543–48, JB/T 9112–24
» Butt Welded End Standards: ANSI B16.25
» Test and Inspection Standards: API 598, DIN 3230, JB/T 9092
» Medium: Water, gas, oil, etc.

Product Features

» Light and Compact
» Zero Leakage Sealing Design with Soft Seated
» Non Slam Design
» Bubble Tight Closed Off
» Discs open 85° to ensure a low pressure drop