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Branch Office: Mehta House, Relief Road, Ahmedabad 380001
Tel: +91 97732 78770 | Email: info@supremevalves.in | www.supremevalves.in
Technical Datasheet -- Spring-Loaded Direct-Acting Pressure Reducing Valves
Direct-acting spring-loaded pressure reducing valves for water, steam, and compressed air service. Maintains constant downstream pressure regardless of upstream pressure and flow variations -- no external power, instruments, or control system required. Compact design with fast response. Diaphragm (EPDM/NBR for water) or piston (SS316 for steam) actuation. Factory-set and sealed to purchaser's exact downstream pressure. EN 1567 / ASME B16.34 compliant.
| Parameter | Specification |
|---|---|
| Product Type | Pressure Reducing Valves |
| Category | Control Valves |
| Size Range | 1/2" to 12" (DN15 to DN300) |
| Pressure Rating | PN16 / PN25 / PN40 / Class 150 / Class 300 |
| End Connections | Threaded NPT / BSP (1/2" to 2"), Flanged RF per EN 1092-1 / ASME B16.5 (1" to 12") |
| Body Material | ASTM A216 WCB / Ductile Iron EN-GJS-500-7 (GGG50) / ASTM A351 CF8M (SS316) / Gunmetal / Bronze (small sizes) |
| Trim Material | SS316 / Gunmetal / Bronze (standard); SS316 with Stellite 6 overlay (steam / high velocity) |
| Seat Material | SS316 with Stellite 6 overlay / EPDM insert (water, low pressure) / PTFE insert (water, chemical) |
| Diaphragm / Piston Material | EPDM / NBR / Viton FPM / PTFE / SS316 (piston type) |
| Spring Material | Carbon steel (standard) / SS316 (corrosive) / Inconel X-750 (high temp > 400 deg C) |
| Control Type | Direct-acting spring-loaded diaphragm or piston -- no external power, instruments, or pilot required |
| Set Pressure Range | 0.5 to 25 bar (7 to 365 psi) downstream -- factory-set and sealed per purchaser specification |
| Accuracy | +/- 5% to +/- 10% of set pressure (dependent on size, spring rate, and flow variation) |
| Temperature Range | -10 deg C to +80 deg C (water, EPDM diaphragm) -- up to +200 deg C (water/steam, NBR/Viton) -- up to +425 deg C (steam, SS316 piston with Inconel spring) |
| Component | Material |
|---|---|
| Carbon Steel | ASTM A216 WCB body (standard industrial water / steam) |
| Ductile Iron | EN-GJS-500-7 (GGG50) body (water distribution, economical) |
| Stainless Steel | ASTM A351 CF8M (SS316) body and trim (corrosive / chemical / food-grade service) |
| Gunmetal / Bronze | Gunmetal (LG2) or bronze body and trim (small sizes, water / marine / traditional applications) |
| 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 | EN 1567 Safety Devices for Protection Against Excessive Pressure -- Safety Valves (reference), ASME B16.34, manufacturer's standard |
The Pressure Reducing Valve -- Direct Acting Water / Steam 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.