The mixers consist of a cabinet containing a control unit, a thermostatic water blender and up to 7 mixing units, one for each solution.

Each solution unit mixes or recycles small batches, normally 4.5 litres (11/4 US Gallons) and pumps them in to replenisher storage tanks. The cycle is repeated as often as required, to keep the processors supplied with freshly mixed chemistry.

Individual mixing units differ in the number of constituents and their capacity. Outputs can be up to 150 litres (40 US Gal)/hr. For very large labs 2 or more units per solution can be used.

The mixing sequence is entirely conventional, taking water or processor overflow and adding chemical concentrates in turn. Each stage is checked, as if by a conscientious technician and when correct, the mixer proceeds to the next step.

A very simple but safe method, not requiring conventional metering pumps, is used to measure out the correct volumes of the constituent parts of a mix.

The self-priming pumps feed the concentrates or water into a measuring chamber mounted above the mixing tanks. The measuring chamber is filled to a precise volume each time a constituent is dispensed and the time to fill is used to calculate how long the pump must run to measure out the correct quantity.

The measuring method is not only very accurate, resulting in precise process control, but provides a simple fail-safe warning system. If the time to fill the measuring chamber is outside pre-set limits, the mixer stops and gives an audible and visible warning.

The method of measuring has a number of advantages:
bullet The mixers are very safe - they will either mix correctly or stop and give a warning. The mix data (list of constituent parts) is set by means of a keyboard or from a remote PC and requires no adjustment of metering pump bellows or cams. The quantity dispensed depends solely on the volume of the measuring chamber, which is unlikely to change, and is almost completely independent of pump characteristics.

Small batch mixing improves consistency.
Mixers are very compact and require a small fraction of the space required for manual mixing.
Exposure to chemicals is minimised, reducing health hazards and simplifying compliance with legal requirements

HV3 mixers are modular and are specified individually for every installation. Each mixer contains 2-7 mixing units of the appropriate specification. Rockwell Hitec, or its distributors, are pleased to advise on receipt of detailed requirements.

HV3 Brochure

HV3 Specification Sheet