The York S1-1TVM4F1 Expansion Valve is a critical metering device engineered for high-pressure R410A refrigerant applications

making it ideal for R-410A refrigeration systems

and thermostatic air vent for a drop-in 15-minute repair

While widely compatible

Emerson Alco 099009 Pressure Control R-410A The York S1-1TVM4F1 Expansion ValveThe Emerson Alco 099009 (Model PS2 Y7K) is a heavy duty dual pressure control designed for precise cycling and high pressure protection in commercial refrigeration and HVAC systems. This PS2 Series dual control features a low pressure side ranging from 9"Hg to 102 psig with an adjustable 15 to 73 psig differential, paired with a high pressure side rated for 87 to 464 psig. Engineered for versatility, the low side operates on an auto reset mechanism,