preventing belt "fighting" and vibration on multi-groove pulleys

providing reliable differential pressure sensing to prevent hazardous exhaust accumulation

Extended System Reliability: Prevents bypass leaks that could otherwise lead to rollout issues or pressure switch tripping

using a 60Hz coil on a 50Hz circuit may lead to increased amperage and heat

obstructed secondary heat exchangers

Siemens Building Technology 134-1451 Switch 320720-756 preventing belt "fighting" and vibrationThe Siemens 134 1451 is a high performance pressure electric switch designed for commercial pneumatic control systems, specifically for operating electric heating loads or motors on fans, pumps, and small air compressors. Utilizing a heavy duty DPST (Double Pole, Single Throw) snap acting contact mechanism, this 134 1451 Siemens switch is configured as normally closed, opening when the air signal rises to the user defined setpoint. With a wide