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What is the difference between the SEC99AB-18 and SEC99AB-18C
this unit handles a maximum pressure of 250 psig and operating temperatures up to 406°F
typically involving terminals 1 and 2 for power and 3
ensuring safer and more efficient operation
Honeywell MP516A1087 Damper Actuator 320734-701 What is the difference betweenThe Honeywell MP516A1087 Pneumatic Unit Ventilator Damper Actuator is a heavy duty, rolling diaphragm actuator designed for proportional control of unit ventilator dampers. Engineered for reliability in institutional HVAC systems, this spring return pneumatic actuator features an 11 square inch effective diaphragm area and a versatile 2 1 8 to 2 1 2 inch stroke length. It operates on a 3 12 PSI spring range with a specific hesitation sequence: the