Safety Relief Valves
Relief Valve - 800QR
This new generation valve allows the piping to remain in place, while only the insert is replaced. This makes replacement of the valves faster and less costly than the standard valve. The ASME certified slope of 0.42 yields, for example, a capacity of 9.29 lbs. per minute of air @ 250# set pressure. Stainless steel housing for durability and performance. Quick-Release Cartridge Style Valve
Product Spec Spotlight
- Set Pressure
- 50-400 psi
- Temp Range
- -20°F to 275°F
- Body Material
- Stainless Steel
- Weight
- 3.9 lbs
Custom set pressures available at no additional charge — call us if you need a value outside this range.
ASME Certified
UV & NB stamped
100% Tested
Every valve, every time
American Made
Manufactured since 1912
Specifications & Details
Additional Specifications
1/2" MPT
- Outlet
- 3/4" FPT
- Configuration
- Dual Port, Open Port
- MAWP
- 500 psi
| Inlet | Outlet | Configuration | MAWP |
|---|---|---|---|
| 1/2" MPT | 3/4" FPT | Dual Port, Open Port | 500 psi |
Design Features
National Board Certification #: 51163 Set Pressure Range: 50-400 PSI in 25 PSI increments. Special Settings can be made at no extra charge and typically takes 1-2 extra days; Each valve undergoes 3 separate test sequences for set pressures and seals, and then are lock-wired for security.
| Design Features |
|---|
| National Board Certification #: 51163 Set Pressure Range: 50-400 PSI in 25 PSI increments. Special Settings can be made at no extra charge and typically takes 1-2 extra days; Each valve undergoes 3 separate test sequences for set pressures and seals, and then are lock-wired for security. |
800 Series Capacity Chart Slope = 0.42 SCFM/PSIA Standard Conditions [60 ˚ F, 1 Atm]
50
- Air SCFM
- 29.3
- Air lb/min
- 2.2
- Air lb/hr
- 134.0
- NH3 lb/min
- 1.7
- NH3 lb/hr
- 102.8
- R-22 lb/min
- 3.9
- R-22 lb/hr
- 231.5
- R-290 lb/min
- 2.8
- R-290 lb/hr
- 165.3
- R-404A lb/min
- 4.1
- R-404A lb/hr
- 246.0
- R-502 lb/min
- 1.4
- R-502 lb/hr
- 84.9
75
- Air SCFM
- 40.8
- Air lb/min
- 3.1
- Air lb/hr
- 186.9
- NH3 lb/min
- 2.4
- NH3 lb/hr
- 143.4
- R-22 lb/min
- 5.4
- R-22 lb/hr
- 322.9
- R-290 lb/min
- 3.8
- R-290 lb/hr
- 230.6
- R-404A lb/min
- 5.7
- R-404A lb/hr
- 343.0
- R-502 lb/min
- 2.0
- R-502 lb/hr
- 118.4
100
- Air SCFM
- 52.4
- Air lb/min
- 4.0
- Air lb/hr
- 239.8
- NH3 lb/min
- 3.1
- NH3 lb/hr
- 183.9
- R-22 lb/min
- 6.9
- R-22 lb/hr
- 414.3
- R-290 lb/min
- 4.9
- R-290 lb/hr
- 295.8
- R-404A lb/min
- 7.3
- R-404A lb/hr
- 440.1
- R-502 lb/min
- 2.5
- R-502 lb/hr
- 151.9
125
- Air SCFM
- 63.9
- Air lb/min
- 4.9
- Air lb/hr
- 292.6
- NH3 lb/min
- 3.7
- NH3 lb/hr
- 224.3
- R-22 lb/min
- 8.4
- R-22 lb/hr
- 505.6
- R-290 lb/min
- 6.0
- R-290 lb/hr
- 361.0
- R-404A lb/min
- 9.0
- R-404A lb/hr
- 537.1
- R-502 lb/min
- 3.1
- R-502 lb/hr
- 185.4
150
- Air SCFM
- 75.5
- Air lb/min
- 5.8
- Air lb/hr
- 345.5
- NH3 lb/min
- 4.4
- NH3 lb/hr
- 264.9
- R-22 lb/min
- 9.9
- R-22 lb/hr
- 596.9
- R-290 lb/min
- 7.1
- R-290 lb/hr
- 426.3
- R-404A lb/min
- 10.6
- R-404A lb/hr
- 634.2
- R-502 lb/min
- 3.6
- R-502 lb/hr
- 218.9
175
- Air SCFM
- 87.0
- Air lb/min
- 6.6
- Air lb/hr
- 398.4
- NH3 lb/min
- 5.1
- NH3 lb/hr
- 305.5
- R-22 lb/min
- 11.5
- R-22 lb/hr
- 688.3
- R-290 lb/min
- 8.2
- R-290 lb/hr
- 491.5
- R-404A lb/min
- 12.2
- R-404A lb/hr
- 731.2
- R-502 lb/min
- 4.2
- R-502 lb/hr
- 252.4
200
- Air SCFM
- 98.6
- Air lb/min
- 7.5
- Air lb/hr
- 451.3
- NH3 lb/min
- 5.8
- NH3 lb/hr
- 346.0
- R-22 lb/min
- 13.0
- R-22 lb/hr
- 779.6
- R-290 lb/min
- 9.3
- R-290 lb/hr
- 556.8
- R-404A lb/min
- 13.8
- R-404A lb/hr
- 828.3
- R-502 lb/min
- 4.8
- R-502 lb/hr
- 285.9
225
- Air SCFM
- 110.1
- Air lb/min
- 8.4
- Air lb/hr
- 504.1
- NH3 lb/min
- 6.4
- NH3 lb/hr
- 386.5
- R-22 lb/min
- 14.5
- R-22 lb/hr
- 871.0
- R-290 lb/min
- 10.4
- R-290 lb/hr
- 622.0
- R-404A lb/min
- 15.4
- R-404A lb/hr
- 925.4
- R-502 lb/min
- 5.3
- R-502 lb/hr
- 319.4
250
- Air SCFM
- 121.7
- Air lb/min
- 9.3
- Air lb/hr
- 557.0
- NH3 lb/min
- 7.1
- NH3 lb/hr
- 427.1
- R-22 lb/min
- 16.0
- R-22 lb/hr
- 962.3
- R-290 lb/min
- 11.5
- R-290 lb/hr
- 687.3
- R-404A lb/min
- 17.0
- R-404A lb/hr
- 1022.4
- R-502 lb/min
- 5.9
- R-502 lb/hr
- 352.9
275
- Air SCFM
- 133.2
- Air lb/min
- 10.2
- Air lb/hr
- 609.9
- NH3 lb/min
- 7.8
- NH3 lb/hr
- 467.6
- R-22 lb/min
- 17.6
- R-22 lb/hr
- 1053.7
- R-290 lb/min
- 12.5
- R-290 lb/hr
- 752.5
- R-404A lb/min
- 18.7
- R-404A lb/hr
- 1119.5
- R-502 lb/min
- 6.4
- R-502 lb/hr
- 386.4
300
- Air SCFM
- 144.8
- Air lb/min
- 11.0
- Air lb/hr
- 662.8
- NH3 lb/min
- 8.5
- NH3 lb/hr
- 508.2
- R-22 lb/min
- 19.1
- R-22 lb/hr
- 1145.1
- R-290 lb/min
- 13.6
- R-290 lb/hr
- 817.7
- R-404A lb/min
- 20.3
- R-404A lb/hr
- 1216.5
- R-502 lb/min
- 7.0
- R-502 lb/hr
- 420.0
325
- Air SCFM
- 156.3
- Air lb/min
- 11.9
- Air lb/hr
- 715.7
- NH3 lb/min
- 9.1
- NH3 lb/hr
- 548.7
- R-22 lb/min
- 20.6
- R-22 lb/hr
- 1236.4
- R-290 lb/min
- 14.7
- R-290 lb/hr
- 883.0
- R-404A lb/min
- 21.9
- R-404A lb/hr
- 1313.6
- R-502 lb/min
- 7.6
- R-502 lb/hr
- 453.5
350
- Air SCFM
- 167.9
- Air lb/min
- 12.8
- Air lb/hr
- 768.5
- NH3 lb/min
- 9.8
- NH3 lb/hr
- 589.2
- R-22 lb/min
- 22.1
- R-22 lb/hr
- 1327.8
- R-290 lb/min
- 15.8
- R-290 lb/hr
- 948.2
- R-404A lb/min
- 23.5
- R-404A lb/hr
- 1410.6
- R-502 lb/min
- 8.1
- R-502 lb/hr
- 486.9
375
- Air SCFM
- 179.4
- Air lb/min
- 13.7
- Air lb/hr
- 821.4
- NH3 lb/min
- 10.5
- NH3 lb/hr
- 629.8
- R-22 lb/min
- 23.7
- R-22 lb/hr
- 1419.1
- R-290 lb/min
- 16.9
- R-290 lb/hr
- 1013.4
- R-404A lb/min
- 25.1
- R-404A lb/hr
- 1507.7
- R-502 lb/min
- 8.7
- R-502 lb/hr
- 520.4
400
- Air SCFM
- 191.0
- Air lb/min
- 14.6
- Air lb/hr
- 874.3
- NH3 lb/min
- 11.2
- NH3 lb/hr
- 670.3
- R-22 lb/min
- 25.2
- R-22 lb/hr
- 1510.5
- R-290 lb/min
- 18.0
- R-290 lb/hr
- 1078.7
- R-404A lb/min
- 26.7
- R-404A lb/hr
- 1604.7
- R-502 lb/min
- 9.2
- R-502 lb/hr
- 554.0
| Set Pressure (PSIG) | Air SCFM | Air lb/min | Air lb/hr | NH3 lb/min | NH3 lb/hr | R-22 lb/min | R-22 lb/hr | R-290 lb/min | R-290 lb/hr | R-404A lb/min | R-404A lb/hr | R-502 lb/min | R-502 lb/hr |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 50 | 29.3 | 2.2 | 134.0 | 1.7 | 102.8 | 3.9 | 231.5 | 2.8 | 165.3 | 4.1 | 246.0 | 1.4 | 84.9 |
| 75 | 40.8 | 3.1 | 186.9 | 2.4 | 143.4 | 5.4 | 322.9 | 3.8 | 230.6 | 5.7 | 343.0 | 2.0 | 118.4 |
| 100 | 52.4 | 4.0 | 239.8 | 3.1 | 183.9 | 6.9 | 414.3 | 4.9 | 295.8 | 7.3 | 440.1 | 2.5 | 151.9 |
| 125 | 63.9 | 4.9 | 292.6 | 3.7 | 224.3 | 8.4 | 505.6 | 6.0 | 361.0 | 9.0 | 537.1 | 3.1 | 185.4 |
| 150 | 75.5 | 5.8 | 345.5 | 4.4 | 264.9 | 9.9 | 596.9 | 7.1 | 426.3 | 10.6 | 634.2 | 3.6 | 218.9 |
| 175 | 87.0 | 6.6 | 398.4 | 5.1 | 305.5 | 11.5 | 688.3 | 8.2 | 491.5 | 12.2 | 731.2 | 4.2 | 252.4 |
| 200 | 98.6 | 7.5 | 451.3 | 5.8 | 346.0 | 13.0 | 779.6 | 9.3 | 556.8 | 13.8 | 828.3 | 4.8 | 285.9 |
| 225 | 110.1 | 8.4 | 504.1 | 6.4 | 386.5 | 14.5 | 871.0 | 10.4 | 622.0 | 15.4 | 925.4 | 5.3 | 319.4 |
| 250 | 121.7 | 9.3 | 557.0 | 7.1 | 427.1 | 16.0 | 962.3 | 11.5 | 687.3 | 17.0 | 1022.4 | 5.9 | 352.9 |
| 275 | 133.2 | 10.2 | 609.9 | 7.8 | 467.6 | 17.6 | 1053.7 | 12.5 | 752.5 | 18.7 | 1119.5 | 6.4 | 386.4 |
| 300 | 144.8 | 11.0 | 662.8 | 8.5 | 508.2 | 19.1 | 1145.1 | 13.6 | 817.7 | 20.3 | 1216.5 | 7.0 | 420.0 |
| 325 | 156.3 | 11.9 | 715.7 | 9.1 | 548.7 | 20.6 | 1236.4 | 14.7 | 883.0 | 21.9 | 1313.6 | 7.6 | 453.5 |
| 350 | 167.9 | 12.8 | 768.5 | 9.8 | 589.2 | 22.1 | 1327.8 | 15.8 | 948.2 | 23.5 | 1410.6 | 8.1 | 486.9 |
| 375 | 179.4 | 13.7 | 821.4 | 10.5 | 629.8 | 23.7 | 1419.1 | 16.9 | 1013.4 | 25.1 | 1507.7 | 8.7 | 520.4 |
| 400 | 191.0 | 14.6 | 874.3 | 11.2 | 670.3 | 25.2 | 1510.5 | 18.0 | 1078.7 | 26.7 | 1604.7 | 9.2 | 554.0 |
