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Tel: +91 97732 78770 | Email: info@supremevalves.in | www.supremevalves.in
Technical Datasheet -- Spring-Assisted Axial Flow Check Valves for Low Pressure Drop
Axial-flow nozzle check valves for low pressure drop and non-slam closure. Spring-assisted disc moves axially along the flow centreline, eliminating the water hammer common in swing check valves. Compact wafer or flanged design suitable for any orientation. API 594 / ASME B16.34 compliant. SS316 or WCB body with Stellite seat overlay.
| Parameter | Specification |
|---|---|
| Product Type | Nozzle Check Valves |
| Category | Check Valves |
| Size Range | 2" to 48" (DN50 to DN1200) |
| Pressure Class | Class 150 / Class 300 / Class 600 / PN16 / PN25 / PN40 |
| End Connections | Wafer type (fits between flanges) or RF flanged per ASME B16.5 / EN 1092-1 |
| Body Material | ASTM A351 CF8M (SS316) / ASTM A216 WCB / ASTM B148 C95800 (NAB) |
| Disc Material | SS316 with Stellite 6 overlay or solid SS316 |
| Seat Material | SS316 with Stellite 6 overlay -- metal-to-metal seal |
| Spring Material | SS316 (standard) / Inconel X-750 (high temp) / Elgiloy (corrosion resistant) |
| Guide Material | SS316 guide bushing with PTFE or bronze liner |
| Face-to-Face | API 594 wafer pattern or ASME B16.10 short pattern |
| Orientation | Any orientation (horizontal, vertical, inclined) |
| Cracking Pressure | 0.03 to 0.1 bar (dependent on spring selection and disc weight) |
| Leakage Class | API 598 / EN 12266-1 -- metal seated standard leakage acceptable; soft seat option: Class A |
| Temperature Range | -29 deg C to +425 deg C (SS316) -- up to +540 deg C (Inconel spring) |
| Component | Material |
|---|---|
| Stainless Steel | ASTM A351 CF8M (SS316), CF3M (SS316L) |
| Carbon Steel | ASTM A216 WCB (standard industrial) |
| Nickel-Aluminium-Bronze | ASTM B148 C95800 (NAB) -- marine / seawater |
| Seat Overlay | Stellite 6 on SS316 seat for erosion resistance |
| Spring | SS316, Inconel X-750, or Elgiloy depending on temperature and corrosion requirements |
| Test | Requirement |
|---|---|
| Testing | Hydrostatic shell test 1.5 x WP per API 598 / EN 12266-1; Seat leakage test per API 598 / EN 12266-1; Functional test -- full stroke, torque; Material certificates per EN 10204 3.1 |
| Certification | ISO 9001:2015 QMS, EN 10204 3.1 material certificates, hydrostatic and seat test reports |
| Standard | Description |
|---|---|
| Design Standard | API 594 Check Valves, ASME B16.34, EN 12334 |
The Nozzle Check Valve -- SS316 Axial Flow 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.