Transformer Tank Spray & Baking Booth
Coat oversized transformer tanks — inside and out — in one enclosed, explosion-proof booth. Configurable to workpieces up to 12,000 mm and 50 tonnes, with floor-mounted chain transfer that removes the need for overhead cranes.
1.Typical Workpieces
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Workpiece
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Typical size
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Typical weight
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Coating requirement
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Power transformer tank
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6,000 – 12,000 mm L
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10 – 50 T
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External weather-proof + internal oil-resistant coating
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Distribution transformer tank
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2,000 – 6,000 mm L
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2 – 10 T
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Single-coat external, optional internal
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Transformer radiator / cooler
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1,500 – 4,000 mm L
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0.5 – 3 T
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Dip or spray, external only
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Large steel fabrication
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up to 15,000 mm L
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up to 60 T
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Primer + topcoat, spray & bake
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Pressure vessel
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3,000 – 10,000 mm L
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5 – 30 T
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External anti-corrosion coating
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2. Why an Enclosed Booth for Oversized Tanks
· Overspray containment — a 35-tonne tank generates a very large paint cloud; an enclosed envelope with four-stage filtration keeps it out of the workshop and off neighbouring equipment.
· Explosion protection — oil-based coatings demand explosion-proof motors, lighting, control cabinets and wiring. Open spraying cannot meet this.
· Spray and bake in one place — once a 35 T workpiece is positioned, you do not want to move it again. Heating in the same envelope removes an entire handling step.
· Consistent finish on long surfaces — a stable 0.25 – 0.35 m/s down-draft across the full envelope holds gun distance and film build uniform from end to end.
· Operator access to internal surfaces — full-height door access plus side lighting lets operators work inside the tank safely.
3. Configurable Parameters
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Parameter
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Configurable range
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Notes
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Booth internal length
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12,000 – 20,000 mm
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Sized to workpiece + end clearance
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Booth internal width
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6,000 – 8,000 mm
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Allows side access and operator movement
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Booth internal height
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6,000 – 8,000 mm
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Accommodates full tank height plus lift clearance
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Workpiece length
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up to 12,000 mm
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Longer on request
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Workpiece weight
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up to 50 T
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Transfer system rated above workpiece weight
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Air velocity
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0.25 – 0.35 m/s (no load)
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Down-draft across full cross-section
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Air volume
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sized to envelope
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Supply and exhaust balanced to the booth cross-section
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Illumination
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800 – 1,200 LUX
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IP65 explosion-proof LED fixtures
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Heating — diesel
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200 – 400 kW
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Riello burner, 304 stainless heat exchanger
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Heating — electric
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150 – 350 kW
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304 stainless elements, staged control
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Baking cycle
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10 – 25 min to 60 °C
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Depending on mass and heating option
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Material handling
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floor rail / roller-chain cart, 20 – 60 T
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Alternative: overhead crane or turntable
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Filtration
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4 stages — G3 / F5 / paint arrestor / activated carbon
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Upgradeable to higher efficiency
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Power supply
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380 V, 50 Hz or 60 Hz
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Other voltages on request
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Explosion protection
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Ex-proof motors, lighting, cabinet, conduit & junction boxes
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Rated for oil-based coatings
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4. Standard Scope of Supply
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Module
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Included
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Booth envelope
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Rock wool sandwich panels (wall 70 mm / roof 50 mm), colour-coated steel both faces
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Plenum chamber
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Square-tube frame, filter trough and support mesh
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Doors
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Electric rolling shutter (main) + personnel doors with pressure-relief lock and viewing window
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Floor pit
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Grated pit with 30 × 4 mm flat steel grating
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Air supply unit
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Double-inlet centrifugal fans, belt drive, modulating damper
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Exhaust unit
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Double-inlet centrifugal fan, belt drive, regulating damper
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Ducting
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Straight sections plus 90° and 45° elbows
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Lighting
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T8 LED tubes in IP65 explosion-proof boxes, ceiling and side rows
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Filtration
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4 stages — pre-filter G3, fine filter F5, glass fibre paint arrestor, activated carbon
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Heating (optional)
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Diesel burner with heat exchanger, or electric element bank
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Spray equipment
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60:1 airless pump, stainless paint tank, high-pressure hoses, guns
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Material handling
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Roller-chain transfer cart with platform, rail, VFD drive and remote control
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Electrical control
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Explosion-proof cabinet — spray mode, baking mode, timing, lighting, fault alarm, E-stop
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Documentation
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Maintenance manual, electrical diagram, certificate of conformity, packing list
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5. Options & Upgrades
· Heating source — diesel burner or electric element bank
· Transfer system — roller-chain cart, floor rail trolley, overhead crane interface or turntable
· Door configuration — rolling shutter, sliding or retractable front
· Control upgrade — PLC + HMI with recipe storage and data logging
· Filtration upgrade — higher-efficiency final stage, or heat recovery on exhaust
· Voltage / frequency — 380 V 50 Hz, 380 V 60 Hz, or other regional standards
6. Reference Configuration
A recent delivery in this product family was built on a 15,000 × 6,500 × 6,500 mm internal envelope for 9.8 m transformer tanks, with a 40 T roller-chain transfer cart, a 60:1 airless spray package and four-stage filtration. Full internal and external coating was achieved in a single booth with diesel heating rated at 300 kW.
7. FAQ
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Question
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Answer
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Can the booth coat both internal and external surfaces?
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Yes. Full-height door access and side lighting allow operators to work inside the tank, while external surfaces are coated in the same cycle.
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What is the maximum workpiece weight?
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Standard designs cover up to 50 T, with the transfer system rated above the workpiece. Heavier duties can be engineered on request.
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Do you build for 60 Hz / 380 V?
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Yes. Booths are built to regional power standards including 380 V 60 Hz; confirm your site supply at enquiry stage.
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What explosion protection is included?
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Explosion-proof motors, lighting enclosures, control cabinet, flexible conduit and junction boxes, rated for oil-based coatings.
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How is a 35-tonne tank moved?
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A floor-mounted roller-chain transfer cart carries the workpiece on a platform. This avoids the cost and headroom of an overhead crane.
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Can heating be added later?
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Yes. Diesel or electric heating can be specified at order stage or retrofitted, subject to power and space provision.
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Can the booth be installed outdoors?
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Indoor installation is standard. Outdoor layouts are possible with weatherproof cladding and drainage — advise at enquiry.
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Call to Action
Get Best Price
Send us your workpiece dimensions, weight, coating specification and available floor area. Our engineering team will size the booth and return a configured proposal.
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Transformer Tank Spray & Baking Booth | CoatTech Images
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