MFD-GB-31-A-R

UL-555 Test Ratings

Fire Rating : 3 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

For manual reset of damper.

Transitions (R)

Neck adapter for round duct connections.

Junction Box

Model : MFD-GB-31-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)