Alera ALECASTERST2 dual-wheel hooded casters B stem 2" black 5/set 100 lb hardware
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Square aluminium motorised damper with spring return, 23 in frame, 12 in depth, 100-240 V operation
The Dayton 4C561 is a single-panel, power-open, spring-return control damper built from aluminium with a .1 in frame thickness. It fits a 23 in square rough opening measuring 21 in by 21 in and suits HVAC contractors and facility managers who need automated airflow regulation in square ductwork.
The integrated motor allows remote or automated opening while the spring-return mechanism closes the blade automatically when power is removed, removing the need for a separate return actuator. Rated for 4 in wg maximum static pressure and 3500 fpm maximum velocity, it handles typical commercial supply and return applications without additional reinforcement.
Verify the existing ductwork provides a 21 in by 21 in square rough opening and that the control circuit can supply 100-240 V AC to the actuator. Confirm the system static pressure and air velocity stay within the 4 in wg and 3500 fpm limits, and ensure the single-panel blade orientation matches the required airflow direction.
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| Product | |
|---|---|
| Brand name | DAYTON |
| Product type | Single Panel, Power Open, Spring Return |
The spring-return actuator cycles each time the damper opens and closes; plan to inspect the spring and linkage annually and replace if corrosion or fatigue appears on the aluminium blades or frame.
The damper is rated for a maximum air velocity of 3500 fpm and a maximum static pressure of 4 in wg; sustained flow at or above either value will hit the design limit first.
The actuator operates on 100-240 V supply; power draw is low for this size, and the aluminium frame and blades dissipate heat quickly so surface temperature stays near ambient during continuous duty.
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