The Plastic Air Valve (PAV Uni-Flo combination automatic air valve) is a corrosion-free, glass-reinforced-nylon air release and vacuum break valve designed for efficient discharge of large air volumes from smaller water networks, filters, containers and similar systems where trapped air impairs operation. Its aerodynamic float delivers high-velocity air flow yet does not close before water reaches the valve, and it seals leak-tight under all conditions including low system pressure.

Features & Specifications

• Three modes of operation: air discharge on filling, air intake on draining, and entrained-air release under pressure

• Corrosion-free glass-reinforced nylon (GRN) body and base

• Kinetic float in polypropylene, automatic float in GRP, EPDM seals and NBR O-ring

• 50 mm BSP screwed male inlet with threaded swivel BSP-female outlet

• Rated to 16 bar; sizes DN15–DN80; pressure classes PN10–PN16

• Overall height 267 mm, width 100 mm, weight 0.73 kg

• Kinetic nozzle area 855 mm², nozzle area 7 mm²

• Leak-proof sealing at all pressures, including low system pressure

• Simple, low-part-count design for easy dismantling and maintenance

Dimensions & Technical Data

Materials: base GRN, body GRN, kinetic float polypropylene, automatic float GRP, seals EPDM, O-ring NBR.