BSB Dampers
Air, Fire and Smoke Control
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BSB Engineering Services Ltd.
Unit 56, Trinity Trade Centre,
Mill Way, Sittingbourne,
Kent ME10 2PD, United Kingdom
Sales Office: +44(0)1795 422609
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+44(0)1795 505366
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FSD-TD Series - Pneumatic Actuator Specifications


Pneumatic Actuator with thermal fuse

The BSB PM-P-TF model provides instant failsafe operation from a 72°C fusible link release and an external manual reset mechanism.
The BSB quarter-turn actuator is a rack and pinion combination that converts the linear movement of the shaft. Quarter turn actuators based on this principle exhibit an identical torque characteristic across the entire rotation angle range of 90°.
A 300mm stub duct is provided to accommodate the duct mounted thermal fuse assembly.

•   Failsafe closure of the damper upon a rise in temperature within the duct exceeding 72°C (+/- 4°C) or removal of the air supply
•   Operating pressure 4.9 bar min. Nominal 5.6 bar
•   Actuator spring opening and spring closing time less than 3 seconds
•   External indication of blade position
•   In duct test facility
•   Auxiliary switch option available
•   Maintenance free
•   Weight = 1.3 kg
•   Operating medium: dried, filtered compressed air
•   Actuator torque at normal operating pressure: 29 Nm

Actuator Construction
•   Housing: Anodised aluminium
•   End Caps: Die-cast aluminium, coated
•   Drive Shaft: Anodised aluminium
•   Internal Seals: Polyurethane, nitrile rubber


Pneumatic actuator with no thermal link.

BSB Engineering Services Ltd. reserves the right to modify or withdraw any specification without prior notice that may result from continuous product development. The information contained within this website is for reference only. Full product details should be obtained from our Sales Office.

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