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Guided Piston Non-Return Valve with Spring-Assisted Closure for Horizontal Pump Discharge
This datasheet covers guided piston check valves in WCB with optional spring-assisted closure for horizontal pump discharge, compressor outlet, and process manifold isolation.
| Parameter | Specification |
|---|---|
| Valve Size Range | DN15 to DN300 (1/2" to 12") |
| Pressure Rating | PN40 / Class 300 / Class 600 |
| Body Material | WCB carbon steel, normalised and tempered |
| Piston Material | SS316 + Stellite 6 hard facing, guided with integral wings |
| Seat Material | Integral Stellite 6 overlay, lapped to piston |
| Guide | SS316 integral body guide ribs matched to piston wings |
| Spring | Optional Inconel X-750 spring-assisted closure |
| Gaskets | Spiral-wound SS316 + graphite for body/cover joint |
| Temperature Range | -29°C to +425°C (WCB); +593°C with WC9 |
| End Connections | Flanged ASME B16.5 / BS EN 1092-1, butt weld, socket weld |
| Cracking Pressure | 0.1 to 0.5 bar without spring; higher with spring preload |
| Features | Guided piston, spring-assisted closure, low cracking pressure, horizontal optimised, renewable trim |
| Component | Material |
|---|---|
| Body | WCB carbon steel, sand cast, normalised and tempered, machined seat bore and guide ribs |
| Cover | WCB carbon steel, bolted cover with spiral-wound gasket groove |
| Piston | SS316 piston with Stellite 6 cobalt alloy hard facing on seating surface and integral guide wings |
| Seat | Integral WCB with Stellite 6 overlay; renewable screwed seat ring for severe service |
| Guide | SS316 guide ribs integral to body casting, matched to piston wings for axial stability |
| Spring | Optional Inconel X-750 spring for rapid closure; selected per service pressure and flow velocity |
| Gaskets | Spiral-wound SS316 + graphite for body/cover joint; same for flange gaskets |
| Test | Requirement |
|---|---|
| Test Standard | API 598 / ISO 5208 |
| Certification | CE, PED, ISO 9001, IBR on request |
| Standard | Description |
|---|---|
| Design Standard | ASME B16.34 / BS 1868 / API 6D |
The Piston Check Valve -- Horizontal Guided WCB is designed, manufactured, and tested in accordance with applicable API / ASME / BS / ISO international standards. Compliance documentation and Material Test Certificates (EN 10204 3.1) are provided with every order.
Standard construction is carbon steel, stainless steel (CF8 / CF8M), and special alloy grades. Alternative and upgraded grades -- Duplex, Super Duplex, Inconel, Monel, Hastelloy, and NACE MR0175 trims for sour service -- are available on request.
It is offered in a range of sizes as per the technical specification with standard ANSI / ASME pressure classes (PN ratings on request). End connections include flanged (RF / RTJ), butt-weld, socket-weld, and screwed ends as per specification.
Yes. Supreme Valves India is an established exporter of industrial valves to Saudi Arabia (KSA), the UAE, Qatar, Kuwait, Oman, Bahrain, and across the Gulf. We provide sea-worthy export packing, EN 10204 3.1 / 3.2 certification, certificate of origin, and support for SABER / SASO conformity on KSA shipments.
Every valve undergoes hydrostatic shell and seat testing per API 598 / ISO 5208. Documentation includes EN 10204 3.1 MTC (3.2 on request), NDT reports, and fire-safe (API 607) or NACE MR0175 certification where applicable. Third-party inspection by TÜV, SGS, Bureau Veritas, or Lloyd's Register can be arranged.
Order quantities are flexible -- from single units for stocked items to bulk volumes for project requirements. Lead time depends on size, material, and quantity; please contact our team with your specification for a firm delivery schedule and quotation.