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GRIFFCO Air Release (Priming) Valve
- Product Details
- Specifications
- Applications & Features
GRIFFCO Air Release (Priming) Valve
Prime the Pump and Clear Air Locks Without Breaking the Line
A dosing pump with air or gas in its head cannot push against a back pressure valve, so it loses prime. The air release valve is a small bleed valve fitted on the pump side of a GRIFFCO back pressure valve.
Opening it takes the pressure off the pump head, so the pump can prime at start-up or push out trapped gas. The bled liquid is piped back to the chemical tank.
It is worked by hand as standard. For automatic degassing, a solenoid valve on a timer can open it for a set time each time the pump starts.
How to Order
The air release valve is supplied fitted to a GRIFFCO back pressure valve (M-Series, G-Series, High Flow, Unibody or Medium Pressure) or 2-port relief valve, from ¼” to 2″. Ask for the valve with the “AR” priming valve option.
Specifications
| Item | Specification |
|---|---|
| Function | Pump priming and degassing |
| Fitted To | GRIFFCO back pressure valves and 2-port relief valves, ¼" – 2" (DN 8 – DN 50) |
| Position | On the pump side of the back pressure valve |
| Operation | Manual; automatic with a timed solenoid valve (optional) |
| Materials | PVC, PP, PVDF, 316 SS; others on request |
| Pressure Rating | As the valve it is fitted to; 24 bar (350 psi) rated version available |
| Order Code | Add "AR" to the back pressure or relief valve code |
Applications
- Dosing systems with a back pressure or anti-siphon valve
- Pumps that lose prime or gas-lock, for example with chemicals that give off gas
- Start-up and commissioning of new dosing lines
Key Features
- Prime the pump by hand without breaking the discharge line
- Release air or gas locks from the pump head
- Optional automatic degassing with a timed solenoid valve
- Mounted directly on the back pressure valve: no extra tee or fittings
- Bled liquid returns to the tank, so there is no spill
- PVC, PP, PVDF or 316 SS; others on request
