75, 1/2" x 3/4" STRAIGHT STEAM MAIN AIR VALVE Vendor_Albany Pump lead free brass or stainless

lead free brass or stainless steel thermowell

• Maximum boiler pressure 25 psi (1

McDonnell & Miller 193 Series Data Sheet

Includes a separable brass thermowell for 3

• Model 51 can be field upgraded with a No

75, 1/2" x 3/4" STRAIGHT STEAM MAIN AIR VALVE Vendor_Albany Pump lead free brass or stainlessModel 75 Part No. 401434 Air Valve (non vacuum) Float type thermostatic vent For medium and large systems Single non adjustable port 12" NPT female and 34" NPT male straight shank Maximum operating pressure* Model 75 3 psig (0. 2 bar) Model 75H 10 psig (0. 7 bar) Maximum pressure 15 psig (1. 0 bar) *Drop away pressure (maximum pressure against which the vent can open). Hoffman 75 Air Valve Data Sheet