Air Operated Unloader Valve · Low Temperature
The Aqua Environment model 907 unloading valve uses a low control pressure to shut off a high pressure line such as on the discharge of a compressor. Specially designed for low temperature service (–40°F | –40°C). When control pressure is released, the valve opens. A minimum of 70 psi control pressure is required to operate the valve at 6000 psi. Control pressures up to 5000 psi can be used without affecting operation or damaging a valve. One application for the valve is to unload a compressor upon shutdown. Interstage pressure could be used as the control pressure. Also works on automatic condensate drains for compressor separators, like the Coltri MCH6.
This is a special order item and may take 1-2 weeks for delivery. Contact the Nuvair sales team for estimated lead times.
Typical Applications
- Unload his pressure interstage and discharge lines upon shut down
- Automatic condensate drains for compressor separators, like the Coltri MCH6
- Control of high pressure lines using low pressure air and inexpensive low pressure solenoids
- Numerous other control and logic functions
- Process industry control of liquids and gases
- Air tank fill stations
Specifications
| Type | Unloader Valve |
| Hand Loaded/Operated or Dome/Air Operated | Air Operated |
| Maximum Rated Pressure | 6000 psi |
| Inlet Port Size | 1/4" MNPT |
| Outlet Port Size | 1/8" FNPT - must vent to atmospheric pressure |
| Control Port Size | 1/4" MNPT |
| Maximum Differential Pressure | 6000 psi |
| Outlet Pressure Rating | Atmosphere |
| Maximum Control or Dome Pressure | 5000 psi |
| Leakage | Bubble tight |
| Flow Coefficient (Cv) | 0.05 (equals 0.06 in orifice) |
| Actuating Pressure | 70 psi at 6000 psi inlet 50 psi at 4000 psi inlet 25 psi at 2000 psi inlet |
| Minimum Temperature | –40°F (–40°C) |
| Body Material | Anodized aluminum |
| Internal Materials | Brass, Stainless |
| Seal Materials | Kel-F, Nitrile, Nylon |
| Weight | 7 oz (200 g) |
| Overall Length | 3.5" |
| Round Diameter | 1.5" |
| Repair Kit | 907-L-14 |
| Special Note | 90 micron inlet filtration |
