McDonnell & Miller 157S-A Controller Els PW 17895 This natural gas valve is

This natural gas valve is built for longevity and precision

The Johnson Controls T-4002-203 is a high-performance direct acting pneumatic thermostat designed for precise temperature regulation in commercial HVAC systems

This specific model is a commercial cast iron type intended for non-corrosive refrigerants

the 550001626 offers an adjustable operating temperature differential of +/-4°F to +/-20°F

000 BTU/hr capacity for multiple appliances

McDonnell & Miller 157S-A Controller Els PW 17895 This natural gas valve isThe McDonnell & Miller 157S A (Part Number 173702) is a heavy duty combination low water cut off and pump controller designed specifically for commercial and industrial steam boiler applications. Featuring a snap acting SPDT switch, this unit ensures precise control over water levels and reliable burner cutout during low water conditions. The 157S A model includes alternate tappings, providing versatile installation options for equalizing pipes and