the Johnson Controls T-4000-119 is the standard Allen head adjustment tool required for the precise calibration and maintenance of T-4000 series pneumatic thermostats

or differential pressure within a set point range of 0

ensuring accurate signal response without the wear associated with traditional potentiometers

Is this shaft compatible with other brands

maintaining the thermal efficiency of the refrigerant line set

Trane VAL9478 TXV 320788-703 the Johnson Controls T-4000-119 isThe Trane VAL9478 is an OEM grade thermostatic expansion valve (TXV) engineered specifically for 4 ton cooling applications. Designed for high pressure R410A refrigerant, this component features a 3 8" ODF inlet and a 1 2" ODF outlet, ensuring low restriction sweat connections in residential and light commercial air conditioning systems. The 5 foot capillary tube provides the necessary reach for precise bulb placement on the suction line, allowing for