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Square galvanized-steel motorized damper with flanged frame, single panel, power-open spring-return, 30-inch rough opening

Dayton

Dayton 5NKK5 Flanged Frame Motorized Damper 100-240V 30 in

SKU CH-4YN9-CZRYS

Motorised single-panel damper with spring return for 30 in square ducts, operating on 100-240 V AC

  • Product typeSingle Panel, Power Open, Spring Return
  • Motorised operation covers 100–240 V AC supplies
  • Spring-return action closes damper automatically on power loss
  • Single-panel design fits 30 in square duct openings
  • Galvanised steel blades withstand 3500 fpm air velocity
  • 14-gauge frame handles up to 4 in wg static pressure

Flanged Frame Motorized Damper 30 in

The Dayton 5NKK5 is a single-panel motorized damper with a square flanged frame. It operates on a 100-240V AC supply and uses a power-open, spring-return actuator. The unit is designed for nominal 30 in square ductwork.

Suited for automated square-duct zoning

This damper suits HVAC systems that require motorised airflow control in 30 in square ducts. It is not for round duct installations, multi-panel configurations, or applications exceeding 4 in wg static pressure or 3500 fpm velocity.

Fits 30 in square rough openings

The damper requires a 30 in by 30 in square rough opening and provides an overall height and width of 29 3/4 in with a 14 1/2 in length. Its 14 ga frame and galvanised steel blades mount directly into the ductwork, while the wide-voltage actuator simplifies electrical integration.

How it compares

Measured against everything we stock in General Hardware & Accessories, at today’s prices. Recalculated every night.

Price $425.99
Pricier than about 91% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameDAYTON
Product typeSingle Panel, Power Open, Spring Return

Questions about this item

Does the 29 3/4 in square frame fit my existing 30 in rough opening?

Yes — the rough opening dimensions are 30 in by 30 in, so the 29 3/4 in frame sits inside that cutout with a small clearance.

Will the spring-return blade close against my 3500 fpm system airflow?

The damper is rated for 3500 fpm maximum air velocity and 4 in wg static pressure, so the spring can overcome that flow when power is removed.

How do I confirm the actuator received 100/240 V AC after wiring?

Apply power — the single panel should drive fully open; remove power and the spring returns it closed, proving the motor and spring are functional.

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