the switch should be mounted with the diaphragm in a vertical plane

this control does not have an integrated gas shut-off and must be installed downstream from a dedicated gas valve

The Schneider Electric (Erie) VT3253G13A020 Valve Assembly is a heavy-duty three-way zone valve engineered for precise fluid control in hydronic heating and cooling systems

Is this the correct part for a STAS-48 or STAS-144 shell

Comprehensive Seal Replacement: Includes all high-wear internal components like O-rings and diaphragms to eliminate persistent leaks

Trane VAL11800 TXV mario the switch should be mountedThe Trane VAL11800 is an 8 ton thermostatic expansion valve (TXV) designed for high capacity R 410A refrigerant systems. Featuring a Chatleff fitting for secure, leak resistant connections, this oem Trane expansion valve is critical for maintaining the correct superheat and evaporator efficiency across varying load conditions. Unlike standard fixed orifice devices, the VAL11800 utilizes a precision engineered sensing bulb to modulate refrigerant flow,