Field Serviceability: The 360-degree union nut connection allows for easy diaphragm case orientation without breaking pipe connections

Packless Bellows Design: Eliminates common leak points found in traditional shaft-seal designs for increased longevity in steam environments

audible metal-on-metal screeching during startup

Common Questions & Technical Support Can I use a 440V capacitor to replace this 370V unit

Dwyer Instruments 1831-1-RA-S Pressure Switch 340155-7026 Field Serviceability: The 360-degree unionThe Dwyer Instruments 1831 1 RA S Low Differential Pressure Switch is a critical safety component designed for precise HVAC pressure monitoring and air flow verification. This model operates within a set point range of 2. 5 to 9 inches w. c., making it ideal for high static pressure applications where manual intervention is required following a trip. Built with a silicone diaphragm and a rugged Type 1 enclosure, this switch manages a 10 psi maximum