Accessories
OBD - Opposed Blade Dampers
Control dampers for fixed volume balancing and adjustment. Available in five configurations for the following applications:-
OBD-S: Sidewall, eye-lash, bar grilles and ceiling diffusers with screw driver and lever arm operator. Black steel blades.
OBD-1: Sidewall, eye-lash and bar grilles with screwdriver operator. Extruded Aluminium construction.
OBD-2: Ceiling diffusers - square and rectangular multi-pattern (CMP Series) and perforated square neck (CP Series) with lever operator arm. Extruded Aluminium construction.
OBD-3: Duct mounting - for small branch ducts which require fixed dampening. Extruded Aluminium construction.
OBD-3S: Duct Mounting – for small branch ducts which require fixed dampening. Has a special operator system which allows adjustment from side of duct. Painted black steel blades.
Construction is robust, using either painted steel or extruded aluminium, with stainless spring steel friction wire. These dampers are not intended for tight shutoff or where frequent adjustment is intended.
Diffuser Baffles, Throw Reducing Vanes, Equalising Grids, Duct Scoops and Bends
A wide range of air control accessories are available. Contact your local Holyoake branch for details.
Cushion Head Box, Square to Round Adaptors and Spin Connectors
A wide range of duct fittings are available for duct joining or terminating to a diffuser. Contact your local Holyoake branch for details.
PDI - Pressure Differential Indicator
The Holyoake PDI series flow measuring stations and sensors are inexpensive but remarkably accurate pressure differential measuring devices. Because they sense an average of velocity pressures across the duct, they are very tolerant of poor inlet duct configurations and lose little of their straight duct accuracy of better than ±5%. Each flow measuring station is furnished with a label showing the formula and factors for calculating velocity from the pressure differential read on either a Magnahelic or micromanometer. PDI sensors should be used in higher velocities such as there found in VAV terminal boxes. For normal duct velocities use the PDIA sensor.
Duct Access Doors, Ductmate Flanging System and Malco Tools
Access Doors
The ADC-2 and ADH-2 have a galvanised steel frame and double skin panel. They are insulation filled and fitted with cam locks for closing.
The APP is a pressed steel access panel available in three sizes, small(250x150), medium(300x200) and large(450x350). No fastenings are required.
Ductmate
The Ductmate Flanging System creates a virtual one-piece leak-proof seal. Roll formed from galvanised steel, the Ductmate flange produces a tighter, stiffer joint. Ductmate is available as either a 25mm or 35mm system.
Malco Sheetmetal and Ducting Tools
A wide range of quality hand tools are available. Snips, crimpers, notchers, punches and hole cutters to name a few. Contact your Holyoake branch for further details. | |
|
