VA6000A Series Fume Extraction Cabinet with Integral Wet Scrubber

Outer section:

• The outer cabinet is constructed from mild steel epoxy powder coated white.
• Stainless Steel 316 is also an offered optional. (The inner liner construction material is as per the standard specification below).
• The sides are150mm wide that house all services with removable side panels for access to the services as indicated below:
  • Fan on/off switch interlocked with scrubber switch
  • Lights on/off switch
  • Scrubber on/off switch interlocked with fan switch
  • Wet and dry services tap outlets mounted on inside side panel of cabinet
  • 1 Electroplated sliding sash counterweight mounted on opposite side to taps inside side panel
  • Stainless steel wire rope mechanism to operate counter weight incorporating PVC pulley system with inserted bearings for smooth operation
  • Nylon slides and guide system to guide front sash, eliminating any lateral movement and ensuring a smooth vertical rattle-free motion.
  • 1 off 16AMP plug socket either side
  • The front section of the sides house remote handles for the taps for both wet and dry services
  • Aerodynamically and ergonomically designed front aerofoil 316 SS for smooth airflow into the cabinet to avoid any unwanted turbulence.
  • The width of the unit can be passed through a standard door width not exceeding 720mm.

Inner section:

• The inner casing is contour moulded resin impregnated fiberglass.
• No nuts and bolts protruding into the work area
• The drip cup is recessed and sealed firmly without crevices and made from “Vulcanthene”
• The internal baffle is acid resistant resin-impregnated fiberglass, secured by polypropylene stand-offs.

Lighting Details:

• The light is vapour proof incandescent, situated at the top of the cabinet where maximum light dispersant can be achieved.
• The lighting provides a minimum of 800 LUX over the entire work surface.
• The lighting is housed in an external housing and sealed off from the unit by means of a safety glass diffuser.
• A silicone gasket seals the diffuser from the light housing.

Spray System:

The spray nozzles are situated in the following areas:

• At the back of the internal baffle plate is a set of 6 replaceable PVC nozzles.
• Above the internal baffle plate is a set of 4 replaceable PVC nozzles.
• A spray nozzle is situated inside the ductwork immediately after the fume cabinet outlet and before the top mist eliminator.
• All water pipes leading to and from the spray nozzles and water return tank to be of PVC construction.
• Scrubber system to be entirely manufactured from PVC materials.

Extraction System:

• Fan is constructed entirely from PVC with an external motor.
• The fan will be sized according to the size and volume of the cabinet required.
• All ductwork is manufactured from class 4 PVC ducting.
• All bends and joins are PVC sealed.
• The ducting will be for the sole purpose of extracting fumes and vapour from the Perchloric Acid fume cabinet only. No other duct shall be joined into or tapped from it.
• The duct outlet will be set to 1m above the highest point of the roof apex.
• Any ducting other than vertical ducting will have a minimum angle of not less than 150 to ensure any moisture is completely drained from all ducting and avoiding any collection points.
• A mist eliminator with spray nozzles is mounted directly above the scrubber system.

Scrubber System Dosing Pump And Ph Controller (Optional):

The scrubber system is manufactured entirely from PVC materials and includes the following:

• 6 vertically mounted spray nozzles
• Mist eliminator on the outlet side of scrubber
• Quick release couplings on all main supply and return water and drain pipes for ease during service or repairs
• PVC drain sump for diluted acids
• Low level alarm in holding sump
• Automatic shut off valve for topping up with fresh water
• Facility for monitoring PH levels
• Acid proof pump correctly sized for the volume of liquid pumped and the header height to all spray nozzles
• The PH controller will be set at a high PH of 7.5 and low PH of 4.5
• If the PH drops it will alarm automatically, allowing the dosing pump to dose at 0-3lt/H @ 10 bar, 220V, 50Hz IP65, 11W, 120 strokes/mw using a PVC head and valve PTFE Diaphragm pump which will dose an alkaline if the PH is low and an acid if the PH is high the pump will switch itself off automatically once the PH is corrected.