Multi Louvre Dampers

Product Overview

* Higher Sizes / Pressure available on request

Introduction

Introduction

MULTI LOUVRE DAMPERS

Dampers and louvers control the flow of air in a process system or enclosed area. Dampers are usually actuated or manually-adjustable for flow control. They can modulate gas or air flow, detour flow into alternative systems, or isolate a process for inspection and repair.

Louver Dampers  are a type of damper consisting of several blades mounted parallel across a duct. They are versatile and are a lightweight, compact, and have a low leakage to the outside environment. However the flimsiness of long thin blades tends to promote flutter, sealing problems in dirty applications, and a higher pressure drop due to the obstruction of flow by the blades. Louvers are often fixed for a constant flow rate.

Fouress  Louvre dampers are designed to provided a guaranteed sealing efficiency of 99.9%, or better, on cross-sectional area. They incorporate various flexible metallic sealing systems made of austenitic stainless steel or high nickel alloys. Louvre Dampers can also be provided with double row of seal ensuring  100% leak tightness with purge air. Units can be supplied for both circular and rectangular ducts of all size for temperatures and differential pressures up to, and in excess of 650 Deg C and 2000 mm H2O respectively.

Our highly engineered dampers offer optimal process flexibility: they’re designed to withstand the rated plant production, but are also efficient during partial operating loads. Our dampers have been designed for many applications and built according to critical operational requirements depending on Gas Pressure, Gas Temperature and regulation requirements.

Fouress Multilouvre dampers find application in a variety of Industries predominantly  Power Plants, Refineries, Cement Plants and Steel Plants.

Features

Features

Fouress Multi Louvre Dampers are designed to provide Sealing efficiency of 99.9% or better on Cross Sectional Area with single row of seal and 100% with double row of seal with external purge air.

 Dampers incorporate Flexible Metallic leaf spring type Sealing Systems made of Austenitic Stainless Steel or High Nickel alloys.

Dampers are available for square, rectangular or circular cross section ducts.
Designed to withstand flue gases up to 650 Deg C temperature and 2000 mm WC pressure.
Designed to be installed in a horizontal or vertical ducts.
All Multi louvre Dampers feature High Temperature self aligning Gunmetal outboard Bearing which could be accessed from outside for maintenance.
FOURESS Multi louvre dampers can be supplied with parallel or opposed action blades.
Multi Louvre dampers are available with loss motion linkage which is special sliding linkage connecting the shafts, so as to nullify the effects of differential expansion of the frame relative to the blade.

The operation of the Multi louvre dampers could be Electric, Pneumatic, Hydraulic or Manual.

The entire operating gear is located outside of the duct and does not come in contact with flue gases.

The critical components like Actuators, Gearboxes, Bearings, linkages can be accessed , inspected and serviced from outside at all times.

Design Specifications

Design Specifications

* Higher Sizes / Pressure available on request

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MULTI LOUVRE DAMPERS

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