Continuous coating production line for valves

The continuous coating production line for valves is a specialized automated production line for surface coating of various types of valves. It is widely used for large - scale valves, pipe fittings, and other workpieces that require spraying. Here is a detailed description:

I. Equipment Composition

1. Spraying Equipment

   • Paint Spraying Equipment: Includes the spray booth body, air supply and exhaust systems, paint mist treatment system, and lighting system.

   • Powder Spraying Equipment: Includes the powder spray booth body, air supply and exhaust systems, two - stage powder recovery system, and lighting system.

2. Pre - treatment Equipment

   • Degreasing Unit: Removes oil and impurities from the valve surface.

   • Water - washing Unit: Multiple water - washing stages remove residual degreasers.

   • Phosphating Unit: Forms a uniform phosphate film on the valve surface to enhance coating adhesion and corrosion resistance.

   • Drying Equipment: Uses hot - air drying or infrared drying technology to remove moisture from the valve surface.

3. Curing Equipment

   • Curing Oven: Cures the coating through high - temperature heating to ensure coating performance.

4. Conveying Equipment

   • Suspension Conveying Chain: Suspends valves and moves them continuously between various treatment stations.

5. Exhaust Gas Treatment Device

   • Exhaust Gas Treatment Equipment: Uses a design with a labyrinth filter or a combination of honeycomb paper + paint - arresting mesh (coir fiber) + coarse - efficiency filter + medium - efficiency filter bag to treat exhaust gases generated during the spraying process.

II. Process Flow

1. Loading: Hang valves on the conveying chain.

2. Pre - treatment: Sequentially pass through degreasing, water - washing, phosphating, and drying processes to ensure the valve surface is clean and has good adhesion.

3. Spraying: Enter the spray booth, where the coating is evenly applied to the valve surface using automatic spray guns.

4. Curing: The sprayed valves enter the curing oven, where the coating is cured at high temperature.

5. Cooling and Inspection: The cured valves are cooled in the cooling area, followed by appearance and quality inspection.

6. Unloading: Qualified products are unloaded from the conveying system, packaged, and stored.

III. Equipment Features

1. High Cost - effectiveness: Based on being economical, it achieves the best cost - performance ratio.

2. Advanced Equipment: Uses highly automated industrial equipment to showcase the modern and advanced appearance of a modern enterprise.

3. High Compatibility: Meets current production requirements and reserves space for development, considering the needs for increased production and improved quality in the future.

4. Quality Compliance: Strictly follows the ISO900 quality management system to ensure that every installation step is strictly controlled.

5. Environmental - friendly and Energy - saving: Equipped with advanced exhaust gas treatment systems to reduce environmental impact.

The continuous coating production line for valves can effectively improve production efficiency and product quality while meeting environmental requirements. It is an essential piece of equipment in the modern valve manufacturing industry.