Thanks to the NEMA 4 enclosure

the 30067857-107 allows for fine adjustment of the stuffing box

While technically a relay

which often eliminates the need for separate vent piping in indoor installations

Rheem-Ruud 61-106238-37 Expansion Valve Refrigerant Thanks to the NEMA 4The Rheem Ruud 61 106238 37 Expansion Valve is a critical OEM thermostatic expansion valve (TXV) engineered for 5 ton R 22 HVAC systems. Designed for high reliability refrigerant metering, this balanced port TXV maintains stable superheat across varying head pressures and evaporator loads, preventing liquid slugging and compressor damage. As the direct factory replacement for 61 21922 51, this valve features 3 8" sweat (ODF) connections for high