A Thermostatic Expansion Valve (TXV/TEV) remains closed when the system is off because the combined upward force of the spring (P3) and evaporator pressure (P2) exceeds the downward sensing bulb pressure (P1).
HVAC manifold gauge set used by technicians to diagnose, evacuate, and charge refrigeration or air conditioning systems.
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HVAC manifold gauge set used by technicians to diagnose, evacuate, and charge refrigeration or air conditioning systems.