45, 3/4" x 1/2" NPT STRAIGHT STEAM CONVECTOR AIR VALVE Winters Needle Valves Series 221

Series 221

• Insertion lengths available in 13⁄16 - 41⁄8" (30-105mm)

Maximum hydrostatic pressure 350 psig (24

Model 791 - Water Vent Valve For convectors and small mains

45, 3/4" x 1/2" NPT STRAIGHT STEAM CONVECTOR AIR VALVE Winters Needle Valves Series 221Convector Steam Vents Model 45 Part No. 401461 Air Valve (non vacuum) Single non adjustable port For small steam systems Telescopic siphon tube with angle cut assures drainage 18" NPT straight shank (41), 14" NPT straight shank (43), 12" NPT female, and 34" NPT male straight shank (45) Maximum operating pressure 6 psig (0. 4 bar)* Maximum pressure 10 psig (0. 7 bar) *Drop away pressure (maximum pressure against which the vent can open). Hoffman