Gas Pressure Regulator -- EN 334 Natural Gas Service
Technical Datasheet -- Direct-Acting and Pilot-Operated Pressure Reducing Regulators
Document No.SV-DATA-GPR-001
RevisionA
DateMay 2026
ManufacturerSupreme Valves India, Ahmedabad, Gujarat, India
Gas pressure regulators for natural gas distribution and transmission systems. Direct-acting and pilot-operated designs maintain constant downstream pressure regardless of upstream pressure and flow variations. Compliant with EN 334, ANSI Z21.80, and ASME B31.8.
Technical Specifications
| Parameter | Specification |
|---|
| Product Type | Gas Pressure Reducing Regulator |
| Category | Gas Regulation |
| Size Range | 4" (DN100) -- other sizes on request |
| Pressure Class | Class 150 RF per ASME B16.5 |
| End Connections | Raised Face (RF) Flanged per ASME B16.5 |
| Flow Rating | Up to 25 MMSCFD (size and pressure drop dependent) |
| Body Material | Ductile Iron GGG50 (low pressure) / Carbon Steel ASTM A216 WCB (higher pressure) |
| Trim Material | SS316 / Aluminium Bronze |
| Diaphragm Material | NBR / EPDM (low pressure) / SS316 (high pressure) |
| Spring Material | Alloy Steel / SS316 |
| Accuracy Class | +/- 2.5% to +/- 5% of outlet pressure setpoint (dependent on design) |
| Lock-Up Pressure | Typically 1.1 to 1.2 x outlet pressure setpoint |
| Inlet Pressure | To be specified by purchaser (factory-set) |
| Outlet Pressure | To be specified by purchaser (factory-set) |
Materials of Construction
| Component | Material |
|---|
| Ductile Iron | GGG50 per EN-GJS-500-7 (lower pressure classes) |
| Carbon Steel | ASTM A216 WCB (higher pressure classes) |
| Stainless Steel | SS304, SS316, SS316L trim and diaphragm |
| Aluminium Bronze | ASTM B148 C95800 (trim, corrosion resistant) |
Testing & Inspection
| Test | Requirement |
|---|
| Testing | Hydrostatic shell test 1.5 x WP per API 598 / EN 12266-1; Seat leakage test 1.1 x WP -- zero visible leakage; Functional test -- pressure control accuracy, lock-up pressure, full stroke; Set pressure verification -- each regulator individually tested and certified |
| Certification | ISO 9001:2015 QMS, EN 10204 3.1 material certificates, functional test reports |
Applicable Standards
| Standard | Description |
|---|
| Design Standard | EN 334 Gas Pressure Regulators for Inlet Pressures up to 100 bar, ANSI Z21.80 |
| Service Standard | ASME B31.8 Gas Transmission and Distribution Piping Systems |
Notes
- All regulators are manufactured by Supreme Valves India as per our standard specifications.
- Inlet pressure range, outlet pressure setpoint, and accuracy class must be specified by the purchaser prior to order for factory-setting.
- For sour gas service (H2S > 50 ppm), material upgrade to NACE MR0175 compliant materials is required.
- For high-temperature service (> 200 deg C), material upgrade to ASTM A217 WC6/WC9 body and Inconel trim is required.
- All regulators are factory-tested per API 598 / EN 12266-1: hydrostatic shell test 1.5 x design pressure, seat leakage test 1.1 x design pressure (zero visible leakage), functional test (pressure control accuracy, lock-up pressure, full stroke).
