Pop Indicators
Visual discharge indication — know when a valve has opened
Visual confirmation when a safety relief valve has discharged. The 8XX-PI Series is an add-on indicator compatible with 800, 801, 803, and 805 series valves. The PDSV1 and PDSV2 series are standalone pressure differential sensing valves designed for vent line installation.
Add-on or standalone configurationsVisual discharge indicationPDSV1 and PDSV2 pressure differential sensing valvesCompatible with 800 series relief valves
800-PIView specs
- Inlet
- 1-1/8" MNPT
- Pressure Range
- 10-400
804-PIView specs
- Inlet
- 1-3/8" MNPT
- Pressure Range
- 10-400
805-PIView specs
- Inlet
- 1-5/8" MNPT
- Pressure Range
- 10-400
PDSV1View specs
- Inlet
- 1/2" FNPT
- Pressure Range
- 10-400
PDSV1AView specs
- Inlet
- 1/4" MNPT
- Pressure Range
- 10-400
PDSV1BView specs
- Inlet
- 3/8" MNPT
- Pressure Range
- 10-400
| Specification | 800-PIView specs | 804-PIView specs | 805-PIView specs | PDSV1View specs | PDSV1AView specs | PDSV1BView specs |
|---|---|---|---|---|---|---|
| Inlet | 1-1/8" MNPT | 1-3/8" MNPT | 1-5/8" MNPT | 1/2" FNPT | 1/4" MNPT | 3/8" MNPT |
| Pressure Range | 10-400 | 10-400 | 10-400 | 10-400 | 10-400 | 10-400 |
Why Cyrus Shank
Every pop indicator 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
Pop Indicators for demanding refrigeration systems
Frequently Asked Questions