Spray Booth
- Paint booths are fire and health protection enclosures.
- Designed to provide a positive movement of air through the spray area.
Spray Booth – Working
In Spray booth Paint arrester filter Trap overspray & Solid particles and exhausted solvent fumes by exhaust duct.
Advantages
- Safety
- Quality of finish
- Work Environment
- Pollution Regulations
Considerations for selection
- Space Available
- Part Dimensions
- Application Methods
- Production Rate
- Paint Material Sprayed
Basic types
- Dry back type
- Water wash /Curtain type
Dry Spray Booth
Advantages
- Lower initial cost
- Simple Construction
- Lower cost erection
- No water required
- No need of water treatment
- lightweight for loading
Limitation
- Frequent filter replacement
- Filter change – higher cost
- Filter change – production loss
- Irregular booth efficiency
Types of Dry Spray Booth
Types of Dry Spray Booth
Types of Water Curtain Booth
Water Curtain Spray Booth
Advantages
- Suitable for all types of paints
- Can cater high production rates
- No filter change cost
- Regular booth efficiency
- As per the regulatory authorities this is the highest standard design.
Limitation
- Requirement of chemicals to treat paint sludge
- Constant water circulation required
- May need modifications in floor
- Initial cost high
- Disposal of sludge is a problem
Understand Coatings
- Glossy Finish – Only Resin and Pigment
- Matt Finish – Resin with Matting agent ( 4-6 %)
- Sealer – Resin with filler powder ( 15 to 28%)
- Wood Stain – Solvent Thinner with Dyes ( 5 %)
- When spraying of sealer in down drought spray booth, floor filters clogged early because of the filler power in sealer formulation.
- Metallic paint arrester filer can be separated weekly or frequently for cleaning.
Pressurised Booth
- Positive pressure will
restrict dust - High quality finish
- Operator comfort
- Temperature & humidity control
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