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Integrated Control: Built-in 2-amp auxiliary contacts provide seamless signaling to the boiler or primary pump once the valve is fully open
these part numbers are identical in technical specifications and fitment
As a fixed pitch pulley
optimizing fuel efficiency and HVAC system performance in demanding commercial environments
specifically designed to deliver higher horsepower capacity in a more compact drive envelope compared to standard wrapped belts
Siemens Building Technology 331-2988 Actuator 321702-401 Integrated Control: Built-in 2-amp auxiliaryThe Siemens 331 2988 No. 6 Pneumatic Damper Actuator is a heavy duty, rolling diaphragm drive engineered for gradual or positive control of large dampers, centrifugal refrigeration inlet vanes, and multi section air handling units. This high temperature pneumatic actuator features an 8 to 13 psi nominal spring range and a 4 inch stroke, providing the mechanical force necessary for large scale HVAC automation. Utilizing an ozone resistant silicone
