The Ranco A22-391 Constant Differential Control is a specialized temperature control switch engineered for high-demand commercial refrigeration and freezer applications

preventing unwanted overfilling

The Sterling 253R01874-001 Fan Guard is a direct OEM replacement component engineered specifically for Sterling unit heaters and hydronic heating systems

making it an essential component for safety-critical fail-safe operations and low-pressure general service applications

A time-delay fuse is essential for inductive loads such as motors and transformers that pull a high initial current

Sporlan 903406 Valve Els PW 29614 The Ranco A22-391 Constant DifferentialThe Sporlan ADRI 1 0 80 (Part Number 903406) is a high performance discharge bypass valve designed for precise hot gas bypass regulation in commercial refrigeration and air conditioning systems. This externally equalized valve maintains a minimum suction pressure during periods of low load, preventing coil icing and short cycling of the compressor. Featuring a 1 2" ODF solder connection, the 903406 is the direct technical replacement for the legacy