4A VENT 1/2" x 3/4" MAIN-STEAM Excess Pressure Pump in conjunction with the boiler

in conjunction with the boiler operating-control to the to properly match boiler-output to the required load

Model 3 Part No

13a specification)

• Easy temperature adjustment

Series PSE-800 - For commercial steam boiler applications

4A VENT 1/2" x 3/4" MAIN-STEAM Excess Pressure Pump in conjunction with the boilerModel 4A Part No. 401413 Air Valve (non vacuum) Float type thermostatic vent For residential or small one pipe or two pipe systems Single non adjustable port 12" NPT female and 34" NPT male straight shank Install 6 10" (150 250mm) above horizontal return and 18" (450mm) above the boiler water line Maximum operating pressure 2 psig (0. 13 bar)* Maximum pressure 10 psig (0. 7 bar) *Drop away pressure (maximum pressure against which the vent can open).