York S1-129201 Expansion Valve 321894-709 featuring a non-mechanical seat-to-disc alignment

featuring a non-mechanical seat-to-disc alignment that facilitates reliable automatic reseating after each discharge

While designed for Carrier-built equipment

For technicians extending runs

making it a drop-in solution for legacy system upgrades and modern BMS integrations

York S1-129201 Expansion Valve 321894-709 featuring a non-mechanical seat-to-disc alignmentThe York S1 129201 Expansion Valve is a critical precision metering device designed for high efficiency refrigerant flow control in residential and light commercial HVAC systems. This thermostatic expansion valve (TXV) utilizes a 1 2" inlet, 7 8" outlet, and 1 4" external equalizer connection to maintain optimal superheat across the evaporator coil, preventing liquid slugging and protecting the compressor. Featuring a 5 foot long capillary tube and a