The rugged construction and automatic reset capability make it a staple for maintaining efficiency in electric defrost and hot gas defrost systems

reducing mechanical stress on motor bearings and fan shafts

The compact footprint and monolithic pressure cavity design eliminate common failure points such as welds or O-rings

helping technicians distinguish it from standard altitude or different pressure switches during field service

Always verify the maximum working pressure (typically 400 psig) against your specific system requirements

Spirax Sarco 61685 Air Vent THPU32HP7Y The rugged construction and automaticThe Spirax Sarco 61685, also identified as the VS204 1 2" NPT, is a high performance balanced pressure thermostatic air vent engineered for rigorous industrial steam applications. As a veteran technician knows, non condensable gases are the enemy of heat transfer; this unit utilizes a precision welded stainless steel bellows to automatically purge air from steam mains and high point headers. Built with a rugged cast iron body (ASTM A126 Class B) and