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Duotone terrace — saffron brief on the left, garden-folded ledger on the right.
The ball checks act as an internal safety shut-off
maintaining stable static pressure even during low-fire stages to prevent pressure switch trip-outs or combustion instability
and P441-1141
this model is the official 120V replacement for the UV100 series
It is also found in specific PAE
Belimo FSAFB24-SR Actuator Refrigerant The ball checks act asThe Belimo FSAFB24 SR is a high torque fire and smoke actuator designed for the fail safe operation of UL555 and UL555S rated dampers in HVAC systems. Delivering 180 in lb of torque, this actuator provides reliable proportional control using a 2 10 VDC control signal. It operates on 24 VAC DC nominal power and is engineered for high temperature durability, ensuring damper closure during critical life safety events. This model serves as the direct
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