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.

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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 , A516, IS , Corten, SS 304,SS 316, Inconel etc.
2. 2. Blade: A36, IS , A516, IS , 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

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

If you want to learn more, please visit our website SASTAR.

These items are used as required by client technical requirement.

Multilouvre Dampers

DTL Multilouvre dampers are the right solution for larger duct sizes and those applications that demand superior control.

Louvre dampers can be design with parallel blade action and opposed action depending on the customer’s control needs.

DTL Multilouvre Dampers can be manufactured in Carbon Steel or Stainless steel, however for special applications we can utilise any material to suit your requirements such as 800HT, 310S, Alloy 31, Alloy 59…

Various sealing arrangements, including seal air fan, can be used so we can provide the correct sealing efficiency for your application.

DTL bespoke louvre dampers are carefully engineered. Therefore, they can fulfil the most demanding project requirements and specifications.

If you are looking for more details, kindly visit Multi Louver Damper Valve.