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PCS 340 - Hot Immersion Paint Stripper
PCS340 is a non Methylene Chloride hot immersion paint stripper designed to remove wet paint and
powder coatings from a variety of substrates. The process minimises the attack on base metals such
as aluminium and its alloys and magnesium alloys.
2.0 Materials
PCS340
PCS340R
Potassium Hydroxide Flake
0.5N Hydrochloric Acid
Phenolphthalein Indicator
3.0 Equipment
All equipment for use with PCS340 may be constructed of mild steel however 304 grade stainless
steel will reduce sludge formation on the walls and base of the tank. The PCS340 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. Low density electrical
heaters may be used however the cold length should extend at least 200 mm into the stripper
solution and they should be easily removable. Paint residues must regularly be removed from
electric heaters to minimise the potential for them to burn out.
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 filteration system, typically
using a filter press.
All seals and gaskets should be PTFE and Viton must not be used under any circumstances.
The rinse tanks can be fabricated from mild steel and it may prove beneficial to include a spray ring
to improve rinsing. Pressure washing may be required to remove paint residues in inaccessible
areas.
A final rinse can be heated, if required, to aid component dry off and prevent flash rusting in the
case of steel being stripped.
4.0 Method of operation
The PCS340 is used as received. An oil seal can be added to reduce solvent loss however the
circulation must not break the oil seal. The PCS340 is operated between 50 and 70 deg C and the
stripping time will depend upon the paint type and film thickness.
Water must not be allowed to enter the PCS340 working solution as this can cause attack on the
base metal especially aluminium and zinc.
Following stripping in PCS340 the components are rinsed with either one or two rinses. In the event
that two rinses are used the second rinse may be heated to air dry off and reduce the risk of
corrosion. If required Performance Chemicals can provide inhibitors for the final rinse to stop
corrosion of ferrous substrates.
5.0 Testing and 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.
6.0 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.
7.0 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.
PCS340 is a non Methylene Chloride hot immersion paint stripper designed to remove wet paint and
powder coatings from a variety of substrates. The process minimises the attack on base metals such
as aluminium and its alloys and magnesium alloys.
2.0 Materials
PCS340
PCS340R
Potassium Hydroxide Flake
0.5N Hydrochloric Acid
Phenolphthalein Indicator
3.0 Equipment
All equipment for use with PCS340 may be constructed of mild steel however 304 grade stainless
steel will reduce sludge formation on the walls and base of the tank. The PCS340 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. Low density electrical
heaters may be used however the cold length should extend at least 200 mm into the stripper
solution and they should be easily removable. Paint residues must regularly be removed from
electric heaters to minimise the potential for them to burn out.
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 filteration system, typically
using a filter press.
All seals and gaskets should be PTFE and Viton must not be used under any circumstances.
The rinse tanks can be fabricated from mild steel and it may prove beneficial to include a spray ring
to improve rinsing. Pressure washing may be required to remove paint residues in inaccessible
areas.
A final rinse can be heated, if required, to aid component dry off and prevent flash rusting in the
case of steel being stripped.
4.0 Method of operation
The PCS340 is used as received. An oil seal can be added to reduce solvent loss however the
circulation must not break the oil seal. The PCS340 is operated between 50 and 70 deg C and the
stripping time will depend upon the paint type and film thickness.
Water must not be allowed to enter the PCS340 working solution as this can cause attack on the
base metal especially aluminium and zinc.
Following stripping in PCS340 the components are rinsed with either one or two rinses. In the event
that two rinses are used the second rinse may be heated to air dry off and reduce the risk of
corrosion. If required Performance Chemicals can provide inhibitors for the final rinse to stop
corrosion of ferrous substrates.
5.0 Testing and 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.
6.0 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.
7.0 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.