Key Benefits Maximum Flow Capacity: The 1 1/4" orifice and 1 1/2" NPT ports provide high-volume throughput for commercial boilers and cooling systems

obstructed secondary heat exchangers

providing reliable differential pressure sensing to prevent hazardous exhaust accumulation

How do I troubleshoot if the relay is stuck

Siemens Building Technology 134-1451 Switch 320720-756 Key Benefits Maximum Flow Capacity:The 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