Pressure Regulating Valve (PRV) for Natural Gas Service
Description
Technical Data Sheet — Cast Steel Pressure Regulating Valve (PRV) for Natural Gas Service
Size: 16″ × Class 600 / Ambient Temperature Natural Gas
Prepared based on: Product Template Documents and physical product images.
1. General Specifications
| Parameter | Specification |
|---|---|
| Valve Type | Pilot-Operated, Self-Modulating Pressure Regulating Valve (PRV) |
| Size | 16″ (DN 400) |
| Pressure Class | ASME Class 600 |
| Design Temperature Range | -29°C to +80°C (Ambient Temperature Service) |
| Media | Natural Gas (Ambient Temperature) |
| Flow Direction | Bidirectional (Configurable) |
| Control Type | Self-modulating, pilot-controlled (Upstream or Downstream pressure control) |
| Set Point Adjustment | Via pilot valve on top, referenced by pressure gauge |
2. Design & Construction
| Category | Details |
|---|---|
| Body Pattern | Straight Pattern / Y-Pattern |
| Bonnet Design | Standard Bolted Bonnet |
| Control System | Pilot-operated, self-modulating control with piston-balanced trim |
| Sealing Technology | Metal-to-metal seat, Fire-safe design per API 607 / ISO 10497 |
| End Connection | Flanged (RF) per ASME B16.5 Class 600, NPS 16″ |
| Design Standards | API 602, ASME B16.34 |
| Special Design Features | Standard construction for ambient temperature natural gas service. No cryogenic treatment required. |
3. Materials of Construction
| Component | Material Specification |
|---|---|
| Body & Bonnet | ASTM A216 WCB (Carbon Steel Casting), standard for ambient temperature natural gas service. Optional: ASTM A351 CF8M, CF3M, etc. |
| Trim (Disc/Seat) | SS 316 / Stellite Overlay, Metal Hard Seat |
| Stem | SS 316 (ASTM A182 F316) |
| Packing | PTFE / Flexible Graphite |
| Body Seat | Metal-to-Metal Seat, Optional Soft Seat for Class VI Leakage |
| Body Markings | “SAVVY”, “16” (DN), “600” (Class), “WCB” |
4. Performance Characteristics
| Parameter | Specification |
|---|---|
| Pressure Range | 1.5 ~ 42 MPa (Adjustable via pilot valve) |
| Regulation Accuracy | ±2% of set point |
| Leakage Class | ANSI Class IV (Metal Seat) / Class VI (Soft Seat Option) |
| Flow Coefficient (Cv) | 10 ~ 12,000 (Varies by size and design) |
5. Testing & Compliance
| Category | Standard / Requirement |
|---|---|
| Hydrostatic Test | API 598 |
| Fugitive Emissions | ISO 15848-1 (Optional) |
| Special Compliance | NACE MR-0175, NACE MR-0103 (Optional for sour service), API 624, PED 2014/68/EU |
| Cleaning | Standard cleaning. Degreasing not mandatory for ambient natural gas service. |
6. Options & Applications
| Category | Details |
|---|---|
| Optional Features | Position indicator, Lockable pilot adjustment, Pneumatic/Electric positioner, Extended Stem |
| Typical Applications | Natural gas transmission pipelines, pressure regulating stations, city gas distribution, industrial gas supply, high-pressure natural gas metering and regulating systems. |
⚠️ Important Notes:
-
Body Material: For ambient temperature natural gas service, ASTM A216 WCB (carbon steel) is the standard material. Stainless steel (CF8M/CF3M) is optional for corrosive or special applications.
-
No Cryogenic Requirements: This valve is designed for ambient temperature service. No extended bonnet, cryogenic treatment, or low-temperature impact testing is required.
-
Flange Dimensions: NPS 16″ Class 600 flange per ASME B16.5: OD = 685.8 mm, thickness = 76.2 mm, bolt circle = 603.3 mm, 20 bolts × 1½”.
-
Sour Service Option: If the natural gas contains H₂S, NACE MR-0175 / MR-0103 compliant materials and testing can be provided upon request.
