3/4" Air Operated Valve Threaded Normally Closed PVC EPDM Type 1
Item #AOV-751E1
- 6 models: normally closed-normally open; Air-to-open, air-to-close; bottom flow control and top flow control
- Can be operated in any position
- Air actuated at 40 to 80 psi
- Materials of construction: PVC, polypropylene, PVDF, PTFE
- Seal options include: FKM and Kalrez®
- Series NLA no lube manual valves available for DI water applications
Series ARV is a normally-open valve. Until your system is pressurized, the valve is simply open, and air is present. As pressure builds within the system, unwanted air is forced to the highest point in the system, i.e., the normally-open air release valve. When pressure within the system exceeds atmospheric pressure, air is expelled. As liquid rises, the poppet becomes buoyant and eventually closes. (Note, minimum specific gravity of liquid must be .9 or higher). It is possible that trace amounts of air will remain in the system, depending on the rapidity with which the valve closes. It is also likely that some trace amounts of process liquid will be emitted. At system pressure of 10 PSI (with EPDM elastomer), the poppet will seal bubble-tight against the orifice. When pressure and liquid level drop, the valve will automatically re-open.
