Overview
The Numatics C10-03FRLBJCB is a direct-acting pressure relief valve engineered for high-pressure cylinder applications and pressure vessel protection. This valve maintains system integrity by venting excess pressure, preventing equipment damage and ensuring operator safety. With a 0–125 PSI pressure range and 3/8″ NSMP port connection, it integrates into existing pneumatic systems with minimal modification.
Key Features
- Direct-acting relief mechanism for quick overpressure response
- 0–125 PSI pressure setting range
- Compact brass construction with nickel plating for corrosion resistance
- 3/8″ NSMP threaded port for standard industrial connections
- Built-in thermal and pressure protection
- Low cracking and bleed rates for precise pressure control
Technical Specifications
| Pressure Setting Range | 0–125 PSI |
| Port Size | 3/8″ NSMP (National Standard Machine Pipe) |
| Valve Type | Direct-Acting Pressure Relief |
| Material | Brass (electrolysis nickel-plated) |
| Seals | Fluorocarbon |
| Springs | Stainless steel |
| Manufacturer | Numatics (Emerson Automation) |
Typical Applications
- High-pressure pneumatic cylinder protection
- Pressure vessel overpressure venting
- Cylinder end-of-stroke relief
- Industrial manufacturing equipment safeguards
- Bottling, stamping, and press machinery
- Pneumatic accumulator protection systems
Compatibility & Replacements
Compatible With
- Numatics 450 and 453 Series pneumatic cylinders
- Numatics Mark 3 Series directional control valves
- Standard ISO 15552 pneumatic cylinders
- Industrial pneumatic systems operating up to 125 PSI
- Systems with 3/8″ NPT or NSMP threaded ports
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. Direct replacement capability depends on exact cavity, cavity size, and application-specific design parameters.
Works With
- Numatics pneumatic valves and actuators
- ISO 5599/1 directional control valve manifolds
- Industrial pneumatic accumulators and receivers
- Standard compressed air and inert gas systems
- Emerson automation product ecosystems


















