Multi-louver dampers

Multi-louver damper is made up of various blades which rotate on their central shaft. All the blades are connected through linkages. The multi-louver damper can be used for isolating or regulating the flow with quarter turn movement of blade. These are two way flow damper. Generally on-off duty multi-louver damper are parallel blades and control/ regulating duty multi-louver damper are opposed blades type.

The body of multi-louver damper is fabricated from different type of material suitable for site condition and client requirement. Standard materials of construction for critical parts of butterfly damper are-
  1. 1. Body: A36, IS 2062, A516, IS 2002, Corten, SS 304,SS 316, Inconel etc.
  2. 2. Blade: A36, IS 2062, A516, IS 2002, Corten, SS 304,SS 316, Inconel etc.
  3. 3. Shaft: En8, SS 410, SS 304,SS 316, Inconel etc.
  4. 4. Seal: SS 316Ti, Inconel etc.
  5. 5. Bearing: C.I lined Bush type with Grafoil Sheet maintenance free/ Antifriction
  6. 6. Shaft Packing: SS 316Ti/ Braided Graphite.

Other materials of construction can be used as required by client.

SEAL
These dampers are design for sealing up to 99.9% without seal air system and 100% with seal air system. Type of seals: Omega seal/ Solid seal

DRIVE
Multi-louver dampers can be provided with one side or double side drive as required by client.
Types of drive –
            – Manual by Hand Wheel/ Lever/ Chain/ Winch Pulley Arrangement
            – Motorized
            – Pneumatic

          

 1. Frame
 2. Blade
 3. Shaft
4. Blade Seal
5. Shaft Seal/ Packing
6. Bearing
7. Drive Mounting
8. Linkage

STANDARD ITEMS FOR PNEUMATIC OPERATED DAMPER
(These items are used as required by client’s technical requirements)

1. Pneumatic cylinder
2. Speed Regulator
3. Bleed Valve/ Pilot Valve
4. Solenoid Valve
5. Positioner (Pneumatic/ E-P/ SMART HART/ FF type)
6. Position Transmitter
7. Lock Valve
8. I/P Converter
9. Manual Loader
10. Loop Power Indicator
11. Volume Tank

These items are used as required by client technical requirement.

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