As a Single Pole Double Throw (SPDT) switch

which must match the motor's directional output to move air correctly

50" WC: Ensures the inducer fan is moving the exact volume of air required to vent flue gases safely

providing technicians with a versatile solution for varying field requirements

ensuring a perfect 1/3" bore fit without field modifications

Siemens Building Technology SKD82.51U Actuator 321894-708 As a Single Pole DoubleThe Siemens Building Technology SKD82. 51U Actuator is a heavy duty electro hydraulic valve actuator designed for precise flow control in demanding HVAC systems. Operating on a 24V AC power supply, this 3 position actuator provides reliable spring return functionality, ensuring the valve returns to its fail safe position during a power loss. Engineered for use with Siemens VF and VG valves, it features a 20 mm stroke and an integrated positioner for