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specifically calibrated for the control boards found in Weil McLain gas-fired units
delivering a consistent 70 CFM airflow
eliminating energy loss in zoning applications
the S1-1TVMBD1 provides the reliable metering required to stabilize suction pressures across varying load conditions
The unit features a 1/4" barb connection for standard pneumatic tubing and is engineered for surface mount installation
Siemens Building Technology 331-4825 Actuator R-22 specifically calibrated for the controlThe Siemens 331 4825 is a rugged, metal fabricated No. 3 Pneumatic Actuator engineered for reliable performance in demanding commercial HVAC environments. Designed for the precise modulation of air valves and dampers, this unit features a 8 13 psi nominal spring range and a versatile 2 3 4 inch stroke. Built with an all metal body and an ozone resistant rubber rolling diaphragm, it provides consistent force for both two position and modulating
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