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Built to withstand standard indoor operating conditions
This 10 5/8" diameter blower wheel features a 7 1/8" width and a standard 1/2" bore
a new defrost sensor (thermistor)
The sample line connections use 1/4" OD metallic tubing with integral compression ferrules
The robust double-pole configuration provides effective circuit isolation
Siemens Building Technology 331-2998 Actuator Els PW 17895 Built to withstand standard indoorThe Siemens Building Technology 331 2998 is a high performance No. 4 Pneumatic Damper Actuator engineered for the gradual or positive actuation of HVAC dampers. This rugged, metal fabricated unit is a staple for contractors managing air flow in fire and smoke damper systems, mixing boxes, and terminal units. With a 4 inch stroke and a nominal spring range of 8 13 psi, this actuator provides the precise mechanical force required for reliable pneumatic
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