Pressure-sealing check valves operate on a principle similar to conventional check valves, relying on the weight of the valve disc or spring force to maintain the closed position. They only open when backflow pressure exceeds a predetermined threshold, allowing fluid passage. However, unlike standard check valves, pressure-sealing variants are strictly unidirectional, typically featuring a flow-direction arrow on the body to ensure proper installation.
These valves can be customized in structure and material selection to suit diverse media and operating conditions-ranging from corrosive fluids to high-pressure systems.
Product Range
Size Range :NPS 2 to NPS 24
Pressure Range: Class 900to Class 2500
End Connecting :BW, RTJ
Materials: WCB, A217 WC6, A217 WC9, CF8C
Technical Specifications
· Design & manufacture according to ANSI B16.34
· Face-to-face according to ASME B16.10
· End Connection according to ASME B16.5 (RTJ), ASME B16.25 (BW)
· Test & inspection according to API 598.
Key Features
✔ Pressure-Activated Seal – The valve's self-sealing design improves reliability under rising pressure.
✔ Low Flow Resistance – Tilting disc or lift-type design minimizes pressure drop for efficient flow.
✔ High Pressure & Temperature Resistance – Constructed from carbon steel, alloy steel, or stainless steel, rated up to Class 2500 (PN420)
✔ Bubble-Tight Shutoff – Metal-to-metal or soft seating options
✔ Flexible Installation – Suitable for horizontal or vertical pipelines (orientation-dependent).
