Fan Inlet Guide Vane Dampers
Typical Application
Ordering
A range of high integrity dampers has been designed
Quantities, surface finish, drive option and other
to meet the requirements of the offshore oil & gas
special requirements to be stated separately.
and nuclear markets where corrosion resistance,
mechanical integrity and performance are primary
Duct Dia 300Dia
Type IGVD
factors. They are used to control and regulate airflow
through mixed flow or centrifugal fans. They are not
Case Depth Variable
Material 316L
intended for isolation purposes. The following design
Case Thickness 2.0
features have been included:
Type Wozair:
Inlet Guide Vane Damper
Continuously welded construction
Parallel blade motion, blades arranged radially
Manual, pneumatic or electric operation
Case Material:
Excellent corrosion resistance
Stainless Steel
1.4301
= 304
(SS304)
Description
Low Carbon
1.4307
(SS304L) = 304L
Low Carbon
1.4404
(SS316L) = 316L
Each damper comprises of three sections, the cas-
Mild Steel Sheet
ing, the blades and the adjusting mechanism.
Galvanised after Manufacture = GAM
Casing
Case Thickness: 2mm upwards
Precision rolled with continuously welded seams
and flanges available in a range of materials and
Nominal
Clear inside duct dimensions
thicknesses typically:
Duct Size:
Ranging from 300 to 1000Dia
Stainless steel (2 mm to 5 mm thick) mild steel gal-
Order Code Example:
vanised after manufacture (3 mm or 5 mm thick).
IGVD/316L/2.0/300Dia
Note: The damper depth is a function of the case
diameter and therefore a variable.
Blades
These are single skin 3 mm marine grade stainless
steel and are securely bolted to stainless steel stub
spindles. The stub spindles rotate in oil impregnat-
ed sintered bronze bearings in the centre
hub and casing, and are linked externally
to provide parallel blade motion.
Galvanised material option available.
Adjustment Mechanism
A robust external stainless steel linkage
connects the blade stub spindles togeth-
er and provides for each blade segment
to maintain an identical angle through its
travel from fully open to closed. The
blade limkage is operated manually by a
lever and lockable quadrant arrange-
ment.
Options
The following drive options are available:
Hand wheel and gearbox to provide fine
adjustment through the range from fully
open to closed.
Pneumatic or electric actuator with the
supply controlled by a suitable posi-
tioner to provide modulating control.