Siemens Building Technology 331-2988 Actuator 321702-401 these part numbers are identical

these part numbers are identical in technical specifications and fitment

The Johnson Controls V47AC-8 Valve is a professional-grade direct acting temperature actuated water regulating valve specifically engineered for heating applications where precise fluid control is critical

Vibration Dampening: Balanced design reduces mechanical noise and extends the service life of the blower motor bearings

As a fixed pitch pulley

Siemens Building Technology 331-2988 Actuator 321702-401 these part numbers are identicalThe 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