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Duct Regulating Dampers
The DD Series Duct Balancing Damper was designed for duct installations
to balance/regulate airflows. All spindles evolve in low maintenance nylon
bushes which are fitted within pressed inserts. Precise blade positioning is
achieved via a robust dual-purpose quadrant and spindle assembly,
operating the linkage mechanism which is located outside of the airstream.
The quadrant assembly is designed to facilitate simple conversion to
motorisation without the need for additional components.
Features :
* Standard case construction is galvanised mild steel.
* Two airfoil blade designs.
* Four casing options.
* Out of airflow linkage.
* Easy conversion from manual to motorised or vice versa.
* Infinite sizing capability from 100mm to 1000mm and from 100mm diameter to 800mm diameter.
* Variable flange dimensions.
* Comprehensive control options.
* Can be supplied with blades and case in Grades 316 and 430 stainless steel.
* Stainless steel side seals to order.
Specifications and Testing :
* Unless stated otherwise, flange models are suitable for classes A & B of DW144, with spigot models suitable for classes A, B & C of DW144
* Conforms to HVCA specification DW144
* Conforms to Eurovent 2/2 classes A-C
* Independent performance tests for pressure loss, leakage and casing airtightness. Test reports 143, 145 and 146 refer respectively.
Baldes :
The 63mm wide extruded aluminium airfoil section blades are fitted to 12.5mm diameter spindles, with the option of galvanised mild steel or Grades 316 and 430 stainless steel blades available to order. All models are available with either opposed or parallel blades (unless specified, opposed blades will be supplied as standard). Fitted to the ends of the aluminium blades are End Caps to alleviate noise generation.
This product was added to our catalog on Saturday 13 January, 2007.
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