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we recommend inspecting the rubber isolators
The Cleveland Controls DFS-231-121 is a fixed-setpoint diaphragm differential pressure switch engineered for precision performance in HVAC pressure monitoring and combustion air applications
Broad Compatibility: Standard 10K Ohm Type II resistance curve integrates seamlessly with most HVAC controllers
professional technicians should verify mounting hole alignment
Field Reliability: Built to meet strict factory standards
Siemens Building Technology 192-203 Stat 318423-701 we recommend inspecting the rubberThe Siemens 192 203 is a Powerstar 192 Series single setpoint pneumatic room thermostat engineered for precision control in commercial and institutional HVAC environments. This reverse acting (RA) pneumatic controller is specifically designed for 2 pipe systems, utilizing a high air capacity relay to accurately modulate pneumatic valves and damper actuators. Built with a highly sensitive bimetal thermostatic element, it delivers a proportional 3 to 15