VOLUME CONTROL DAMPER

VOLUME CONTROL DAMPERSVCDS 800 SERIES

With its opposed blade operation closing system, volume control damper (VCDS 800 series) is designed for controling air flow and pressure in HVAC systems. Designed to operate with opposed blade action (providing better aerodynamics), volume control damper provides better balancing control or airflow rates.

Blades are formed from single skin construction with grooved blade tips to produce an interlocking blade closure, either via manual or automatic operation.

Manually operated dampers are supplied as standard with a lockable quadrant assembly, thus allowing for conversion to motor operation without the need for additional components.

DESCRIPTION . ILLUSTRATIONS

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. Square and round VCDs available

. Triple V-Groove Opposed Blade operation

. Available in manual or motorised models

. Actuation available in following configurations:

i) Hand locking quadrant arm

ii) Worm gear drive

iii) Bare shaft

iv) Factory installed actuator

. Stainless steel construction available

. Frame construction: 0.7-1.5 mm galvanized steel (Size dependant)

. Blade construction: 0.7-1.0 mm galvanized steel (Size dependant)

CONSTRUCTION

MATERIALS

150 mm

HEIGHT

WALL THICKNESS

HEIGHT + 60 mm

LENGTH

LENGTH + 60 mm

VOLUME CONTROL DAMPERSVCDS 800 SERIES

ACTUATOR INSTALLATION LOCATIONS

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Con�guration A: Shaft Outside Con�guration B: Inside Bottom

Con�guration C: Inside Top Con�guration D: Inside Middle

Con�guration E: Compartment Con�guration F: Infront Shaft

VOLUME CONTROL DAMPERSVCDS 800 SERIES

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AERODYNAMIC PERFORMANCE

5PRESSURE DROP VS DUCT VELOCITY

V (

m/

s)

10

P (Pa) 00= Fully Open

100

200

300

400

500

600

20 30 40 50 60 70 80 100 200 300 400 500

4

3

2

1

. V = Duct Velocity (m/s)

. P = Static Pressure Drop (Pa)

. 00, 100, 200, ... etc = Degree Opening

. Max static pressure drop for fully open dampers is 10 Pa

STATIC PRESSURE DROP

VOLUME CONTROL DAMPERSVCDS 800 SERIES

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500

400

300

200

AERODYNAMIC PERFORMANCE

CLOSED DAMPER LEAKAGE

OPERATION RANGE

. L = Length (mm)

. H = Height (mm)

. VL

= Volume Flowrate (cmh)

. P: = Pressure Di�erence (Pa)

. A = Recommended operation range

. B = Critical operation range

L: 1200

L: 1000

L: 800

L: 600

H

A B

PRESSURE (Pa)

VL

1210

1500

900

800

700

600

1010 810 610 410 210 20 30 40 60 80 100 150 200 300 400 500

P: 100 P: 250 P: 500 P: 1000

P: 1500

VOLUME CONTROL DAMPERSVCDS 800 SERIES

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. H = Damper Height (m)

. L = Damper Length (m)

ACTUATOR TORQUE REQUIREMENTS

FOR PRESSURE LESS OR EQUAL TO 500 PA FOR PRESSURE LESS OR EQUAL TO 1000 PA

H (m)

10 Nm

10 Nm

15 Nm

5 Nm 5 Nm

1.4

0.5 1.0 1.4

1.0

0.5

L (m)

H (m)1.4

0.5 1.0

1.0

0.5

L (m)