Equipment

All equipment for use with PCS340 should be constructed of 304 or 316 grade stainless steel this will reduce sludge formation on the walls and base of the tank. PCS 340 should have lip or hood extraction. The tank should include circulation using educters to enhance the turnover rate (typically 20 tank turnovers per hour) to improve stripping efficiency. The heating system should be designed to maintain the required temperature and ideally be an oil jacket. 

To maintain process efficiency it is essential to have some form of sludge removal system incorporated into the tank. The preferred method is to have an in-line filtration system, typically using a filter press. 

All seals and gaskets should be PTFE and Viton must not be used under any circumstances.

Method of operation

PCS 340 is used as received.  PCS 340 is operated between 50 and 65oC and the stripping time will depend upon the paint type and film thickness.

Water must not be allowed to enter PCS 340 working solution as this can cause attack on the base metal especially aluminium and zinc.

Testing & control

Testing is undertaken to monitor and control the accelerator content. Under normal conditions the PCS340R will maintain the accelerator pointage however under certain circumtances it will be necesary to raise the accelerator pointage with the addition of potassium hydroxide flake.

Prior to undertaking the accelerator pointage test it is advisable to top up the tank with PCS340R if required. Leave to mix for 10 minutes. Take a two ml sample of the PCS340 working solution and add 10ml of water. Add five drops of phenolphthalein and titrate wih 0.5N hydrochloric acid from clear to a pink colouration. The number of mls of Normal Hydrochloric

Acid used is referred to as the Accelerator Pointage. The pointage should be 9. For each point below 9 it is required to add 12 kg of Potassium Hydroxide flake pe 1,000 litres. This is best added via a basket or an in-line addition chamber.

Effluent

PCS340 Solution must not be discharged to main drainage or storm drainage under any account. The rinse waters should be allowed to run to a settling tank, where heavy solvent and paint residues can settle. A registered Waste Disposal Contractor must dispose of heavy residues together with the main solution.

Safety precautions

When handling PCS340 wear nitrile rubber gloves, pvc apron, rubber boots and full face protection. Smoking must be prhoibited in the vicinity of the PCS340 plant.

Full information on the hazards and safe handling of the material as supplied is given in the Health and Safety Data Sheet. This must be read and understood fully by those handling or using the product.