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Square galvanized steel damper frame 24 in with mounted actuator

Dayton

Dayton 5NKK4 Flanged Frame Motorized Damper 24 in 100-240V

SKU CH-JRCJ-VVVZF

Square motorised damper with galvanised-steel blades, 24 in nominal duct size, 100-240 V AC, power-open spring-return operation

  • Product typeSingle Panel, Power Open, Spring Return
  • Motorized operation enables automated airflow control
  • Power-open spring-return design provides fail-safe closure
  • 100-240 V AC supply suits global voltage standards
  • 14-gauge galvanized steel frame resists corrosion
  • 3500 fpm velocity rating handles high-speed ducts

Dayton 5NKK4 Flanged Frame Damper Overview

The Dayton 5NKK4 is a single-panel motorized damper with a flanged frame designed for square ductwork. It operates on a 100-240V AC supply and uses a power-open, spring-return actuator. This unit suits HVAC professionals balancing airflow in commercial or industrial square duct systems.

Verify Duct Dimensions and Voltage Supply

Confirm the rough opening measures 24 inches by 24 inches to match the damper frame. Ensure the ductwork can accommodate the overall height of 23.8 inches and length of 14.5 inches. Check that the control circuit provides 100-240V AC compatible with the actuator nameplate rating.

Galvanized Steel Construction and Frame Details

The blades are made from galvanized steel within a 14-gauge frame built for up to 4 inches water gauge pressure. The square flanged frame allows direct mounting to matching duct openings. Rated for velocities up to 3500 fpm, the spring-return action closes the panel automatically if power is lost.

How it compares

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

Price $362.99
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

What is included with the Dayton 5NKK4 flanged frame motorized damper and what must be purchased separately?

The unit is a single-panel, power-open, spring-return damper with a 14 ga frame and galvanized steel blade. Mounting hardware, duct connectors, and any control wiring are not included and must be sourced separately.

Which voltage version of the Dayton 5NKK4 should I choose for a 100-240V AC supply?

The nameplate voltage is 100/240V AC, so this single model operates across the full range without needing a different version.

How does the 3500 fpm maximum air velocity rating apply when the damper is installed in a 24-inch square duct?

The 3500 fpm limit is the highest airflow speed the galvanized steel blade and 14 ga frame are rated to handle without exceeding the 4 in wg pressure rating.

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