Overview
The ST.L MO ST33 safety valve is a compact, ASME-rated pneumatic relief valve engineered for compressed air systems, air compressors, and pneumatic applications. This model carries a pressure rating of 95 PSI and a flow capacity of 90 SCFM, making it suitable for small to medium-capacity compressor protection and system overpressure control. The valve features a soft-seat design for minimal air leakage and improved seal longevity in dry-air environments.
Key Features
- 3/8″ NPT threaded inlet/outlet — standard port size for compact pneumatic systems
- 95 PSI pressure rating — precise relief setpoint for equipment protection
- 90 SCFM flow capacity — adequate for small to medium compressors
- Soft-seat design — reduces leakage and extends valve life
- Brass body construction — corrosion-resistant, reliable performance
- ASME-certified — meets safety standards for pressure relief applications
Technical Specifications
Port Size: 3/8″ NPT male
Pressure Setting: 95 PSI
Flow Capacity: 90 SCFM
Seat Material: Soft-seat (poppet design)
Body Material: Brass
Certification: ASME code-stamped
Design Type: Direct-acting safety relief valve
Adjustment: Factory-set (not field-adjustable)
Application: Compressed air, pneumatic systems
Typical Applications
- Air compressor overpressure protection and system relief
- Pneumatic control circuits and test equipment
- Small industrial air tools and automation systems
- Air receiver tank protection
- Fire suppression and specialty gas systems
Compatibility & Replacements
Compatible With
- ASME air receiver tanks with 3/8″ NPT port
- Portable and stationary air compressor systems
- Pneumatic test and calibration equipment
- Dry-air compressed systems (non-lubricated)
- Standard pneumatic plumbing infrastructure
Replaces / Drop-In Replacement For
- CRN 0G8703.5C — direct equivalent model number
- ST.L MO ST33 series variants with matching 3/8″ NPT, 95 PSI, 90 SCFM specifications
- Other Control Devices ST33 models with identical pressure and flow ratings
Works With
- Standard 3/8″ NPT adapters and fittings
- Gauge isolation blocks and pressure switch modules
- Air line manifolds and distribution blocks
- Pressure transducers and monitoring equipment
- Industry-standard pneumatic accessories
