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NCA S900 • NCA S900

  • General purpose volume control and shut-off dampers
  • Square, circular and flat oval connections for all types of ductwork
  • Galvanised steel, stainless steel or aluminium construction

Application

Designed for balancing applications where a high level of shut-off is not required.

Material

  • S900B:
    Galvanised steel throughout. Stainless steel frame/case/blades or aluminium blades optional
  • S900C:
    Galvanised steel frame and case, aluminium blades, stainless steel side seals, silicone rubber blade seal. Stainless steel case and frame optional

Order Example

S900BAG - W500 x H500 - SS304 - Belimo SM24A-SR

Explanation

Series
S900B Volume control damper
S900C Shut-off damper

Connection
A Square flanged
B Square spigotted
C Circular spigotted
D Flat oval spigotted

Material
– *nothing* Galvanised steel case, aluminium blades
G Galvanised steel throughout (not available with S900C)
M Galvanised steel case, stainless steel blades (not available with S900C)
S Stainless steel throughout (not available with S900C)
F Stainless steel case, aluminium blades

Stainless steel grade
SS304 Grade 304 stainless steel
SS316 Grade 316 stainless steel (marine grade, high corrosion resistance)
SS430 Grade 430 stainless steel
(Required if material code is M, S or F)

Control
–– *nothing*, Standard: S900B - Lockable plastic handle, S900C - Extended spindle
EX Extended spindle
LQ Locking quadrant
(Actuator) State actuator code
When ordering a spring return actuator, please specify whether you require spring
open or spring close operation.

Dimensions

Weigth Chart (kg) - Series 900 Volume Control & shut offModel A
Height (mm)Width (mm)
1002003004005006007008009001000
1002233444556
2002334455667
3003344566778
4003445667889
500445677891010
6004566789101112
70045678910111213
800567891011121314
9005678101112131415
10006789101213141516

Correction factors

 PressureClass
ModelPaachieved
Model B100-500A & B
600-1000B & C
1100-2000C
Model C100-500A
600-2000N/A
Model D100A
200A & B
300-500A
600-2000N/A
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