Safety Relief Valves
ASME Section VIII — individually tested, UV stamped since 1912
The industry standard for refrigerant system overpressure protection. Every valve is precision-machined in Chicagoland, individually bench-tested, and UV stamped to ASME Section VIII. Available in single-piece, two-piece Quick Release cartridge, and Green Line aluminum configurations. Custom set pressures available at no additional charge.
Compare the Family
Safety Relief Valves at a glance
Showing 6 of 121 models — compare all in the catalog
- Set Pressure (psi)
- 50-400
- Connection Size
- 1/2" MPT X 3/4" FPT
- Set Pressure (psi)
- 250-300
- Connection Size
- 1/2" MPT X 3/4" FPT
- Set Pressure (psi)
- 50-400
- Connection Size
- 1/2" FPT X 3/4" FPT
- Set Pressure (psi)
- 250-300
- Connection Size
- 1/2" FPT X 3/4" FPT
- Set Pressure (psi)
- 50-400
- Connection Size
- 1/2" MPT X 3/4" FPT
- Set Pressure (psi)
- 250-300
- Connection Size
- 1/2" MPT X 3/4" FPT
| Specification | Relief Valve - 800View specs | Relief Valve - 800 OPView specs | Relief Valve - 800DView specs | Relief Valve - 800D OPView specs | Relief Valve - 800QRView specs | Relief Valve - 800QR OPView specs |
|---|---|---|---|---|---|---|
| Set Pressure (psi) | 50-400 | 250-300 | 50-400 | 250-300 | 50-400 | 250-300 |
| Connection Size | 1/2" MPT X 3/4" FPT | 1/2" MPT X 3/4" FPT | 1/2" FPT X 3/4" FPT | 1/2" FPT X 3/4" FPT | 1/2" MPT X 3/4" FPT | 1/2" MPT X 3/4" FPT |
Why Cyrus Shank
Every safety relief valve is built the same way
ASME Certified Quality
Manufactured and documented to meet inspection and code requirements.
Custom Set Pressures
Factory-set to your exact specification at no additional charge.
100% Bench Tested
Every valve is individually tested before leaving the factory.
American-Made
Precision-machined in Chicagoland since 1912.
Where It's Used
Safety Relief Valves for demanding refrigeration systems
Frequently Asked Questions