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NCA Series 900 - Standard Volume Control Dampers

Verified by manufacturer 4 months ago

S900B - Volume control damper, Square Flanged

HVC Supplies Variant:

General-purpose volume control and shut-off dampers.

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Application

Slimline units intended for low/ medium velocity applications.

Description

General-purpose volume control and shut-off dampers intended for low/medium velocity applications. Utilizing the HVC standard out-of-airstream linkage, all gears are protected from dust and dirt by being positioned within the channel outer frame, making S900 dampers less susceptible to requiring frequent maintenance than rival units where the linkage is within the airstream. 


Series 900 dampers are multi-leaf, opposed blade dampers available in two configurations:

S900B: Standard volume control dampers, designed for balancing applications where a high level of shut-off is not required - Galvanized steel throughout as standard, stainless steel optional. 

S900C: Shut-off dampers; fitted with additional seals, shut-off dampers have far lower leakage levels than standard VCDs - Galvanized steel frame and case as standard, stainless steel optional, blades are aluminium with a silicone rubber tip seal. 


Features and benefits:

  • Volume control dampers and low leakage shut-off dampers for general applications.
  • Double skin aerofoil blades.
  • Square, circular and flat oval connections for all types of ductwork.
  • Galvanised steel, stainless steel or aluminium construction.
  • Full range of actuators.

General information

Color

Grey

Guidance for specification option:

Bare metal.

Finish

Galvanized

Material

Steel

Aluminium

Stainless steel

Shape

Square

Circle

Oval

Length

-

Manufacturer guidance

Overall depth.

Width

Bespoke

Height

Bespoke

Warranty description

One year

Uniclass

Pr_65_65_24_78 Shut-off dampersPrimary

CAWS

U90/440 Dampers, automatic

Specification data - Shut-off dampers

Casing leakage

-

Manufacturer guidance

Consult manufacturer's literature for details and insert requirements.

Pressure

Positive.

Material

Galvanized steel (case), Aluminium (blades).

Galvanized steel.

Galvanized steel (case); Stainless steel (blades).

Stainless steel.

Stainless steel (case), Aluminium (blades).

Control method

Lockable plastic handle.

Guidance for specification option:

Standard.

Extended spindle.

Guidance for specification option:

Optional - consult manufacturer for details.

Locking quadrant.

Guidance for specification option:

Optional - consult manufacturer for details.

Actuators.

Guidance for specification option:

HVC can supply a range of factory fitted electronic and pneumatic actuators with S900 damper.

Consult manufacturer and insert requirements.

Manufacturer guidance

Consult manufacturer's literature for details.

Connection

Square flanged.

Manufacturer guidance

Duct connection.

Dimensions

Guidance for specification option:

Insert requirements.

  • Minimum: 100 x 100 mm (nominal).
  • Maximum single unit: 1000 mm width, 1000 mm height or 1000 mm diameter.
  • Consult manufacturer for details.

OverallDepth

65 mm.

Flanges

30 mm wide.

Steel grade

Not required.

Guidance for specification option:

Fully galvanized steel option.

430 grade stainless steel (SS430).

304 grade stainless steel (SS304).

316 grade stainless steel (SS316).

Guidance for specification option:

Marine grade, high corrosion resistance.

Manufacturer guidance

Stainless steel grade (required if stainless steel material is selected).

Sustainability data

Country of product manufacture

United Kingdom

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