Blast Gate Damper

Blast Gate Damper (BGD) are used to open and close branch ducts in a HVAC systems.

Mole HVAC Equipment Ltd offers various damper types and control options. These include rectangular or circular damper casings and manual or actuated control options.

Blast Gate Damper (BGD) are used to open and close branch ducts in a HVAC systems, often used to shut off the flow of air flowing through systems that are not currently in use. A simple construction consisting of a bolted casing c/w fully welded spigots and single blade locked in a position with a screw connection.

Mole HVAC Equipment Ltd offers various damper configurations:

Rectangular

Suitable for direct flange connection to rectangular ductwork or provided with circular insertion spigots to suit connection to circular ductwork.

Circular

Suitable for direct flange connection to circular ductwork.

Blades

Rectangular and circular BGDs are provided in single blade configuration.

Application

Typical application for our dampers:

Oil and GAS

Pharmaceutical

Nuclear

Industrial

Material

Generally 2.0 or 3.0mm thick fully welded 316L St/St construction. Other materials and thicknesses are available to suit client requirements.

Available materials include:

– Stainless steel (304, 316 grade)

– Carbon steel (electro galvanised, pre-galvanised, painted or hot dipped galvanised (HDG) for thicker materials)

– Aluminum

Flanges

Flanges are formed from the parent material to provide a flange width of 40, 50 or 75 80?mm. The flanges are normally drilled to the pitches and diameters defined in BS EN ISO15138:2018 or to the Client specification. At the customer’s request we may also deliver dampers with undrilled/ blank flanges.

Lifting

Where necessary or required lifting points are incorporated within the damper casing.

Sizes

Standard damper sizes are between 100x100mm and 2000x2000mm with a depth of 200mm. Larger damper sizes can be provided by combining multiple dampers. Smaller depths can be provided if required.

Controls

Locking screw allowing damper adjustment between fully open and closed positions.

Other control options, including pneumatic or electric actuator are also available.

Indication

316L Stainless steel open/closed indicators fixed to handle quadrant. Dampers can also be provided with high visibility indication beacons and, where required, with remote position indication (On/Off or continuous/analog)

Nameplate

316L stainless steel nameplate containing agreed information is attached to the damper casing or linkage enclosure.

Hazardous Area

Our dampers are also available in hazardous area execution (ATEX Zone 1 and Zone 2).