Heavy Rectangular Dampers

KHDR-CD Heavy Duty Rectangular Dampers

• Please contact our Technical Sales Team for full Product Specification Details

  Casing:

  • 250 x 50 x 2mm thick mild steel, galvanised or stainless steel material. Folded and fully welded construction. Non standard flanges and 3mm thick casings available

  Blades:

  • 150mm pitch double skin aerofoil type 1.5 or 2.0mm thick material, opposed blades overlapping action in mild steel, galvanised or stainless steel

  Shafts:

  • 20mm diameter 316 stainless steel tolerance bar

  Linkages:

  • Side linkage, out of airstream, 3mm thick stainless steel quadrant arms and link bars. Pivot pins are mounted in Oilite bushes

  Bearings:

  • Oilite bushes (‐9 to + 70 deg. C) standard. High temperature Oilite bushes to 220 deg. C. Graphite bronze to 300 deg. C. reinforced PTFE (chemical resistance)

  Operations

  Manual:

  • Lockable manual quadrant with blade position indicator

  Electric:

  • Electric actuators – open/closed, spring return, modulating, 24v, 110v, 240v and 3 phase operation. Limit switches. Explosion proof ATEX rated options available

  Pneumatic:

  • Open/close, spring return, modulating, limit switches. Explosion proof ATEX rated options available

  Chain operation:

  • Drop chain operation, 90 deg reduction gearbox option available. Stainless steel chain guides and lockable chain retaining bracket.

  Seals

  Blades:

  • Metal to metal opposed blade overlapping operation. Blade ends – stainless steel sprung side seals to inner casing

  Shafts:

  • Oilite bush or reinforced PTFE bush as standard.
  • **Options available – Lip seals, "O" ring seals, packing glands, flange mounted remote bearings. Enclosed and sealed linkages.

  Size Range:

  • From 200sq to 1250sq in one module. *Above these sizes in multiple modules with joint flanges

  Alternative Options:

  • Non standard casing depths and flange widths to suit customer requirements
  • Circular drilled flanges in RSA and to BS & DIN standard patterns
  • Polyester or Epoxy powder coat finish
  • Food quality options available, including gaskets