Pretreatment Plant in Pune, Maharashtra
SEW Surface Coating Pvt. Ltd. designs, manufactures and installs dip and spray pretreatment plants for manufacturers in Pune. Our factory is right here in Pune district, at Ranje on Kondhanpur Road, so Pune buyers deal directly with the manufacturer, with no dealer in between.
A pretreatment plant cleans and chemically prepares metal surfaces before powder coating, liquid painting or CED coating. We supply complete lines with process tanks, water drying ovens, transporter systems and bath-maintenance accessories, so one company is responsible for the whole job.
- Dip & Spray Pretreatment
- Manual / Semi-Auto / Automatic
- Erection & Commissioning
- Factory in Pune
Pretreatment Plants for Pune's Manufacturing Industry
Pune is one of India's largest automotive and engineering centres. Vehicle and component plants are concentrated in Chakan, Bhosari, Pimpri-Chinchwad and Talegaon. Appliance and engineering units have grown in Ranjangaon, Sanaswadi and Shikrapur, and newer industrial belts are coming up along the Pune–Satara road at Shirwal and Khed Shivapur.
In Pune, demand for pretreatment plants comes mainly from automotive and component makers, appliance and HVAC makers and electrical and panel makers. Coating failures such as peeling, blistering and early rust almost always trace back to poor surface preparation. A pretreatment plant removes oil, grease, rust and scale, then applies a conversion coating, typically a phosphate layer, that gives the powder or paint something to grip. The result is better adhesion, longer corrosion life and fewer rejected parts.
For a Pune buyer, having the manufacturer in the same district is a practical advantage. You can visit our works at Ranje to see equipment under fabrication, our engineers can reach your site quickly for layout studies, and service support is close by after commissioning.
Types of Pretreatment Plants We Supply in Pune
Dip Pretreatment Plant
Components are loaded in a basket or jig and dipped through a series of chemical and rinse tanks in sequence. Because every surface is immersed, the chemicals reach inside hollow sections and recesses.
- Articles are loaded in a basket or jig
- The basket or jig is lifted and dipped in each tank as per the required chemical process
- Lifting and dipping by hoist (manual) or transporter system (manual, semi-automatic or automatic)
Best for: Batch production, mixed component sizes, heavy fabrications and parts with hollow sections.
Spray Pretreatment Plant
A conveyor carries components through an enclosed tunnel where each zone sprays a different chemical or rinse. It runs continuously and links directly to the drying oven and coating booth.
- The conveyor carries the article inside the tunnel
- The tunnel has separate zones as per the required chemical process
- Spray density and pressure are controlled with pumps and valves
- Tanks with filters below each zone give better circulation
Best for: High-volume conveyorised lines feeding a powder coating or paint shop, such as auto and appliance parts.
Typical Pretreatment Process Sequence
A standard zinc phosphate line follows the sequence below. Stages are added or removed depending on the base metal, the condition of incoming parts and the coating specification.
- DegreasingRemoves oil, grease and machining fluids.
- Water RinseWashes off degreaser carry-over.
- De-rustingRemoves rust and mill scale from steel.
- Water RinseCleans the surface after de-rusting.
- Surface ActivationPrepares the surface for a fine, even phosphate layer.
- PhosphatingBuilds the zinc or iron phosphate conversion coating.
- Water RinseRemoves excess phosphate salts.
- PassivationSeals the phosphate layer for added corrosion resistance.
- DM Water RinseFinal rinse in demineralised water to avoid salt deposits.
- Water Drying OvenDries components before powder coating or painting.
For aluminium and galvanised components we design the chemical sequence to suit. Our spray lines can also run nano-technology pretreatment chemistry, which works at lower bath temperatures and produces less sludge than conventional phosphating.
Equipment Supplied With the Pretreatment Plant
Water Drying Oven
Dries parts completely after the final rinse, since moisture left on the surface spoils the finish.
Transporter System
PLC-controlled transporter that moves jobs through the tanks on a programmed cycle, giving priority to critical tanks.
Oil Skimmer
Continuously removes floating oil from the degreasing tank, so the chemical lasts longer and parts come out cleaner.
Sludge Separator
Separates phosphate sludge from the bath to keep the process stable and cut tank-cleaning downtime.
Air Agitator
Keeps the bath moving for even temperature and chemical concentration around every component.
Industries in Pune That Use Our Pretreatment Plants
Automotive & Auto Components
Chakan, Bhosari, Pimpri-Chinchwad and Talegaon form one of India's densest auto clusters, with hundreds of tier-1 and tier-2 suppliers.
Typical requirement: Spray or dip zinc phosphate line for high corrosion resistance, ready for powder or CED coating.
Home Appliances & HVAC
Appliance and HVAC makers in the Ranjangaon and Sanaswadi belt process cabinets, panels and sheet-metal parts at high volume.
Typical requirement: Spray pretreatment synchronised with the powder coating conveyor speed.
Electrical Panels & Switchgear
Panel builders and enclosure fabricators in Bhosari, Hadapsar and Pimpri need durable, consistent finishes.
Typical requirement: Spray or dip zinc phosphate line feeding a powder coating booth.
Steel Furniture & Storage
Office furniture, racking, lockers and storage system makers need an even, scratch-resistant finish on sheet metal.
Typical requirement: Conveyorised spray pretreatment matched to continuous sheet-metal production.
Engineering & Fabrication
Machine builders and job fabricators across the city's MIDC estates process frames, guards and heavy structures.
Typical requirement: Dip pretreatment with a transporter system for heavy and mixed-size fabrications.
Motors & Electrical Machines
Motor, alternator and electrical machine makers in the Pune belt need reliable insulation and finishing.
Typical requirement: Dip pretreatment for motor bodies, stampings and housings before painting.
Pretreatment Plant Specifications
| Plant types | Dip pretreatment (batch) and spray pretreatment (conveyorised tunnel) |
|---|---|
| Material handling | Manual hoist, transporter system (manual / semi-automatic / automatic) or overhead conveyor |
| Process stages | Typically 7 to 10 stages, designed to your base metal and coating specification |
| Chemistry | Iron phosphate, zinc phosphate or nano-technology pretreatment |
| Spray system | Zone-wise pumps, valves, nozzles and filtered tanks for controlled spray density and pressure |
| Bath heating | Heating system selected to suit process temperatures and the fuel available at your site |
| Drying | Water drying oven: in-line, batch type, conveyorised conventional or camel back |
| Controls | Manual operation, PLC-controlled transporter, SCADA monitoring on request |
| Bath maintenance | Oil skimmer, sludge separator and air agitator |
| Scope of supply | Design, manufacturing, erection and commissioning |
Final configuration is fixed after we study your component drawings, production rate and available floor space.
Built and Installed Within Pune
Our factory is at Ranje, on Kondhanpur Road in Pune district. Equipment for Pune customers is fabricated and pre-assembled there, delivered to your site by road, and erected and commissioned by our own team.
- Site visit and study of components, production rate and space
- Plant layout designed to fit minimum floor space
- Factory visit to see your plant under fabrication
- Delivery, erection and commissioning at your site
- Trial runs, operator guidance and after-sales service
Why Buyers in Pune Choose SEW Surface Coating
In-house manufacturing since 1996
Our own fabrication unit in Pune gives one-roof control over design, quality and delivery commitments.
25+ years in coating systems
More than two and a half decades of experience in powder and liquid painting systems for automobile, appliance, electrical, furniture and other industries.
Layouts in minimum space
We specialise in fitting a complete line into the floor space you actually have.
Low running cost
Plants are engineered for low fuel consumption, with options such as camel back ovens, solar-assisted heating and Waste Heat Recovery Systems (WHRS).
Modern technology
Nano-technology spray pretreatment, PLC-controlled transporters and SCADA monitoring are part of our installed base.
Quick local service
With our team based in Pune, site visits, trouble-shooting and spares support for Pune are quick and convenient.
Industrial Areas We Serve in and Around Pune
Pretreatment Plant in Pune – Frequently Asked Questions
Are you a pretreatment plant manufacturer in Pune?
Yes. SEW Surface Coating Pvt. Ltd. manufactures pretreatment plants at its own factory at Ranje, Kondhanpur Road, Pune, and has been doing so since 1996. We supply, erect and commission them for customers across Pune and the rest of India.
What is the difference between dip and spray pretreatment?
In a dip plant, components in a basket or jig are immersed in each tank, which suits batch work, heavy parts and hollow sections. In a spray plant, a conveyor carries parts through a tunnel where each zone sprays chemical under controlled pressure, which suits continuous high-volume production.
How many stages does a pretreatment plant need?
Most zinc phosphate lines use 7 to 10 stages: degreasing, rinses, de-rusting, surface activation, phosphating, passivation and a DM water rinse, followed by a water drying oven. We finalise the number after studying your components, base metal and coating specification.
Can you supply the complete line with drying oven and powder coating booth?
Yes. We supply complete lines including pretreatment, water drying oven, powder coating booth or liquid painting booth, curing oven and conveyor or transporter, so one company is responsible for the whole plant.
Do you offer automatic pretreatment plants?
Yes. Dip plants can be supplied with a PLC-controlled transporter system in semi-automatic or automatic mode, and spray plants run on a continuous conveyor.
Can I visit your factory before ordering?
Yes. Our works is in Pune district, so Pune customers can visit us to discuss the layout and see equipment under fabrication. Call +91-99758 35066 to arrange a visit.
How do I get a quotation for a pretreatment plant in Pune?
Send your component size and weight, base metal, production rate and coating type through our enquiry page, or call +91-99758 35066. Our engineers will prepare a layout and technical offer.
Other Products We Supply in Pune
Pretreatment Plants in Other Locations
- Pretreatment Plant in Pimpri-Chinchwad
- Pretreatment Plant in Satara
- Pretreatment Plant in Mumbai
- Pretreatment Plant in Thane
- Pretreatment Plant in Nashik
- Pretreatment Plant in Kolhapur
- Pretreatment Plant in Aurangabad
- Pretreatment Plant in Vapi
Pretreatment Plants – main product page | All locations we serve
Need a Pretreatment Plant in Pune?
Share your component size and weight, base metal, production rate and coating type. Our engineers will send a plant layout and technical offer for Pune, and you are welcome to visit our Pune works.
Send Your Requirement Contact Us