This 1/2 inch automatic vent valve is used in commercial and residential hydronic heating applications to provide automatic air venting for hot or cold water distribution systems. It consists of a brass body construction with female NPT connection, brass cover, air vent with silicone rubber seal, polyethylene float with valve plug, and automatic vent. It has a high temperature rating and is ideal for use with glycol systems or for use as an anti-vacuum device. It can also be installed to permit the separation and dispersal of air while fluid is circulating in the system. It can be disassembled for inspection and cleaning. The maximum pressure is 150 psi (10 bar).
WATTS®, 0590722, Air Vent Valve, Automatic, Series: FV-4, 1/2 in Nominal, NPT End Style, 1.45 to 150 psi Pressure, 33 to 240 deg F, Media: Water, Brass Body, Silicone Rubber Seal Softgoods, 3-5/16 in H Dimensions, Import
- Suitable for use with glycol systems
- Float is high temperature resistant polyethylene
- Can be disassembled for inspection and cleaning
- Brass construction
- Impurities do not usually affect function as maximum float line of water is always lower than the valve seal