Pharmaceutical (External motor air handling unit)

Where non stop production is paramount and cleanliness cannot be compromised our external motor units with all associated bearings and drive components located out side of the air stream and interior linings suitable for cleaning is the solution.

Unit Casing
Continuous galvanised steel to AS 1397 G2 coating class Z275 formed with double folds and cross breaks to provide strong vibration free assemblies. Mig welded joints without external flanges. Insulation is 50mm thick medium density fibreglass (32kg/m3).

Internal lining is minimum 0.8mm galvabond. Rivetted and sealed to provide a flat clean surface without exposed insulation or air gaps.

Seal all penetrations in an approved method (refer coil and fan details).

Entire casing is supported on galvanised channel base frames units up to 4,000L/S 75 x 38 channel -over 4,000L/S 100 x 50 channel.

Fans
All fans are centrifugal mounted on mild steel shafts precision ground to
G6 tolerance.

All bearings will be mounted on the outside of the unit casings. Self aligning ball type with taper adaptor sleeve and pillow block housing or double row roller bearings in plummer block housings.

Bearings have shaft seals at unit casing. Bearings are mounted on substantial angle framing to provide correct support for fan, shaft and drive. Belt guards are fitted on all units.

Coils
Seamless copper tubes expanded into continuous rippled aluminium fins suitable for working pressures up to 1050kpa and factory tested to 2000kpa in water.

Seals around coil connections where they pass through the casings will be airtight.

Condensate Tray
Each cooling coil has a 0.9mm 304 grade B2 finish stainless steel drain tray. Tray is installed to AS 1668. Tray is insulated with 25mm polystyrene foam.

Motors
All motors are 3 phase T.E.F.C. with IP55 protection suitable for use with variable speed drives. Metric frames and foot mounted on adjustable slide rails.

Drives
Vee belt drive are external using cast iron taper lock pulleys and S.P. section belts.

Access
All units have a hinged and double latched access panel operable from both sides. Door seal is EDPM/ soft sponge rubber self gripping seal. Screw panels are used to allow removal of all internal components (if required).

General Notes
a. A gap of 300mm (min.) is provided between cooling and heating coils to allow access to both sides of coils.
b. All sealers used is food grade Hilastic 66.
c. All units come with optional out-riggers to allow spring mounting without increasing overall unit height.