PB Series
Pilot operated upstream pressure control valve combining high sensitivity with stability for precise back pressure regulation.
The PB Series are high-sensitivity pilot operated upstream pressure control (back pressure) valves combining high accuracy with stability for precise back pressure regulation. The main valve responds to the sensing pilot with fast, stable action suitable for demanding gas and liquid applications. Available for a wide range of pressures with flanged connections to ANSI B16.5.
Key Features
- High-Sensitivity Piloting — Precise pressure sensing for accurate, stable back pressure regulation.
- Pilot Operated Accuracy — Pilot operated design achieves far tighter accuracy than direct acting valves.
- Glandless Construction — Eliminates stem seal leakage for zero fugitive emissions.
- Wide Pressure Range — Covers a wide range of set pressures for upstream process control applications.
- Easy Maintenance — Internals replaceable without removing body from pipeline.
Applications
- Chemical equipment and piping
- Gas compressors and pumps
- Cryogenic systems
- Technical gases and CO₂ plants
- LPG/LNG terminals
Technical Specifications
| Body Sizes | 1″ to 8″ — ANSI B16.5 Class 150 & 300 |
| Set Pressure Range | 3.5 kg/cm²g to 28 kg/cm²g |
| Flow Coefficients | Cv 0.8 to 425 (1″ to 8″) |
| Temperature (Nitrile) | -25°C to 80°C |
| Temperature (FKM) | -15°C to 180°C |