Siemens Building Technology 331-2973 Kit Freon Bore Specifications: Standard 1/2-inch bore

Bore Specifications: Standard 1/2-inch bore compatible with common commercial motor shaft sizes

it utilizes a platinum element with a resistance of 1000 Ohms at 0°C

High-torque 115V inducer motor reduces operational noise and vibration-induced fatigue

this high-pressure control is a standard component in various equipment manufactured under the Johnson Controls umbrella

Siemens Building Technology 331-2973 Kit Freon Bore Specifications: Standard 1/2-inch boreThe Siemens 331 2973 is a rugged, metal fabricated No. 4 pneumatic damper actuator designed for the gradual or positive control of HVAC systems and fire smoke dampers. Built for high demand applications, this piston type actuator features a 4 inch stroke and a nominal 8 13 psi spring range, ensuring precise positioning of ventilating systems and mixing boxes. This universal kit includes a mounting plate, pivot post, clevis, and damper crank,