ISO 9001 : 2008

CERTIFIED

MFD-GB-21-A-R

Type : Motorized Fire Damper
Fire Rating : 21 Series-1½ hour
Blade Type : 3V Single Skin; A : Parallel Operation

 

MFD B-21 Series is a high performance UL 555 Classified fire damper with 1½hr.fire rating, installed vertically or horizontally (with blades running horizontally) and is and is rated for airflow in either direction.

UL-555 Test Ratings

Fire Rating : 1½ hrs.

Standard Construction

Frame

16 gauge (1.4 mm – 1.7 mm) thick galvanized steel.

Blades

Parallel operated 3 ‘V’ type blade made of 16 gauge (1.4 mm – 1.7 mm) thick galvanized steel.

Jamb Seals

Stainless steel.

Jack Shaft

12 mm diameter Galvanized steel shaft.

Thermal Response Device (TRD)

165°F.

Actuator

Honeywell, Belimo, Seimens (24V AC, 120V AC, 230V AC).

Sleeve

Minimum 0.9 mm, single section is field or factory installed.
Multiple section is factory installed.
Sleeve thickness as per NFPA table 3-4.6.3.

Bushes

Fire resistant bronze bush.

Limit Switches

For BMS open / close indication.

Optional Fittings

Retaining Angles

1½” x 1½” x 16 gauge (40 x 40 x 1.5 mm).

Blade Seals

Silicon rubber blade seals.

Indicator

Externally mounted open / close visible indicator.

Push Button

Manual reset for damper.

Transitions (R)

Neck adapter for round duct connections.

Junction Box

Model : MFD-GB-21-A/R UL 555 Damper meets the required standards of SMACNA, NFPA, IBC, BOCA, ICBO, UL.

Actuator location standard: Left side from rear view
(Jack shaft view)

Note :
FC : Fail Close in the event of Fire

Optional Construction (UL Certification N/A)

Frame : Stainless Steel 16 gauge (304/316L)
Blade : Stainless Steel 16 gauge (304/316L)

Downloads

Request for Quotation

  • MSFD-GB-31C3-A-R

    Galvanized construction, 3-hour, Class 3 leakage at 350° F, 3V single skin blade, 4 in. wg, 2000 fpm, operating temperature 250° C up to 2 hours
    Read more
  • MSFD-GB-31C2-A-R

    Galvanized construction, 3-hour, Class 2 leakage at 250° F, 3V single skin blade, 4 in. wg, 2000 fpm, operating temperature 250° C up to 2 hours
    Read more
  • MSFD-GB-31C1-A-R

    Galvanized construction, 3-hour, Class 1 leakage at 250° F, 3V single skin blade, 4 in. wg, 2000 fpm, operating temperature 250° C up to 2 hours
    Read more