Trane VAL18751 TXV 318518-761 The S1-025-31813-000 ensures that if

The S1-025-31813-000 ensures that if the system experiences restricted airflow—often due to a clogged filter or a failing secondary heat exchanger—the circuit breaks before the unit sustains damage

When diagnosing HVAC shaft failure or excessive vibration

preventing the boiler from firing

meaning it will restore the circuit once the pressure returns to the differential setpoint

Trane VAL18751 TXV 318518-761 The S1-025-31813-000 ensures that ifThe Trane VAL18751 is a high performance Thermal Expansion Valve (TXV) designed for precise refrigerant metering in 1. 5 ton HVAC systems. Engineered for reliability in residential and light commercial applications, this genuine OEM Trane expansion valve features a 3 8" x 1 2" ODF (Outside Diameter Female) solder connection, ensuring a secure, leak free fit during brazing. The integrated 5 foot capillary tube provides the necessary reach for flexible