Mole HVAC Equipment Ltd has originally been created to utilize our experience in design and manufacturing of HVAC equipment.

• Cooling Coils
• Air Handling Units (AHUs)
• Refrigeration & Air Conditioning Units (AC Units)
• HVAC Dampers
• Volume Control Dampers (VCD)
• Shut Off Dampers (SOD)
• Backdraught Dampers (BDD, NRD)
• Pressure Relief Dampers (PRD)
• Weather Louvres
• Filters
• Lint Filters
• Electric Heaters
• Heat Exchangers

Shut Off Dampers (SOD) (also known as Isolation Dampers) supplied by  Mole  HVAC Equipment Ltd are designed to allow isolation of parts of HVAC system or equipment. They are commonly used within air handling units or fan skids to allow isolation of standby fans. These dampers can also be used for airflow adjustment.

Our dampers are fitted with blade stops and side seals to reduce air leakage through closed blades.

Shut Off Dampers are supplied with a lockable hand quadrant as standard. If powered operation is required they can also be supplied with electric or pneumatic actuators.

Dampers are provided with flanges pre-drilled for installation within the HVAC ductwork. Flanges are drilled in accordance with BS EN ISO15138:2007 unless otherwise specified by Client. All dampers are identified with st/steel nameplates containing relevant information on supplied equipment.

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Mole HVAC Equipment Ltd supplies dampers generally in accordance with the following specification:-

Casing

2.0 or 3.0mm thick fully welded casing complete with 50 or 75mm own material flanges drilled to BS EN ISO15138:2007 or Client specification. Lifting points are incorporated within damper casing. Minimum damper size is 100x100mm, maximum single unit size 2000x2000mm, larger units can be supplied as multiple unit assemblies. Standard damper casing length is 200mm however other lengths are available if required.

 Blades 

2 x 1.5mm double skin, aerofoil construction. Two parts of blade spot welded and bolted to the damper shafts. Longer blades are additionally fitted with siffening channels for increased rigidity.

Shafts

Φ16 end shafts. Shafts are removable to allow bearing replacement if necessary.

Bearings

Maintenance free polymer bearings (suitable for service temperatures between -40 and +80°C and short term temperatures of up to +170°C). High temperature bearings can be provided in necessary.

Controls

Standard control package includes quarter turn adjustable handle mounted on handle plate. Although the damper is designed for airflow isolation it can also be locked in any possition between fully open and fully closed using locking device provided. Stainless steel position indicators are fixed to the handle plate. Other control options, including pneumatic or electric actuator can be provided if required.

Seals

Shut Off Dampers are fitted with top and bottom blade stops and stainless steel side seals to ensure low leakage when SOD is in closed possition.

Nameplate

Stainless steel nameplate containing relevant information is attached to the damper casing. Full colour aluminium nameplates can be offered if required.

Materials

As standard our dampers are manufactured from 316L St/Steel. Other materials to include 304 St/Steel, pre galvanised mild steel, galvanised after manufacturing mild steel or aluminium can be provided if necessary.