China Water Curtain Spray Booth Cabinet – Quality Paint Mist Filter by Reliable Suppliers and Factory
The working principle of the water curtain cabinet for painting is to use a water curtain to capture and filter the paint mist and exhaust gas generated during the painting process. When the painting operation is in progress, the paint mist and odor sprayed from the spray gun will be blocked by the water curtain in the water curtain cabinet. The water curtain mixes with the paint mist through the membrane effect and viscosity of the water, so that the paint mist particles are separated from the air and fall into the water tank.
The water curtain cabinet is usually composed of a pool, a water curtain plate, a top plate, a side plate, a water circulation system and an exhaust system. The pool is used to collect paint mist and wastewater, the water curtain plate is responsible for forming a uniform water curtain, and the top plate and side plates constitute the main frame of the cabinet. The water circulation system ensures the continuous circulation of water, and the exhaust system is used to exhaust the filtered air to the outside.
The design of the water curtain cabinet can effectively reduce the impact of painting operations on the environment and prevent paint mist and exhaust gas from spreading outside the working environment. Through the water circulation system, the removal rate of waste paint can reach more than 99%, greatly reducing the impact of waste paint on the environment. At the same time, the use of water curtain cabinets also helps protect the health of operators.
The cabinet body of the water curtain cabinet is usually made of stainless steel and electrostatically sprayed and painted, which has good corrosion resistance and rust resistance. The water tank and overflow tank are mostly made of stainless steel plates to ensure the durability and stability of the equipment.
What is the working principle of a water curtain cabinet?
It uses a water curtain to capture and filter paint mist and exhaust gas generated during painting. The water mixes with the paint mist through membrane effects and viscosity, separating the particles from the air and letting them fall into a water tank.
What are the main structural components of a water curtain cabinet?
A standard water curtain cabinet consists of a pool, a water curtain plate, a top plate, side plates, a water circulation system, and an exhaust system to ensure continuous water flow and proper air filtration.
How does the water curtain cabinet protect the environment?
It prevents paint mist and exhaust gas from spreading into the surrounding environment. Thanks to its highly efficient water circulation system, the removal rate of waste paint can reach over 99%.
Is a water curtain cabinet safe for operators?
Yes, by effectively blocking and filtering hazardous paint mist and odors before they can spread, the equipment significantly contributes to protecting the respiratory health and overall safety of the operators.
What materials are used to build the cabinet and water tank?
The main cabinet body is usually constructed from stainless steel with electrostatic spraying and painting for rust resistance. The water tank and overflow tank are mostly made of solid stainless steel plates to guarantee long-term durability and stability.
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Assembly line process flow
Step 1: Pretreatment
This is the preparatory work before painting, the purpose is to remove impurities such as oil, dust, rust on the surface of the workpiece, and increase the adhesion between the coating and the surface of the workpiece.

Step 2: Drying moisture
After the pretreatment step is completed, some moisture and possible tiny particles will remain on the surface of the workpiece. The principle of drying moisture is mainly to evaporate the moisture on the surface of the workpiece by heating, ensuring that the surface of the workpiece is dry before entering the powder spraying link so that the powder coating can be evenly attached.

Step 3: Electrostatic powder spraying
Electrostatic spraying is the core link of the powder coating assembly line. In this process, the powder coating is fed into the spray gun, and the spray gun generates high-voltage static electricity through an electrostatic generator. When the powder coating passes through the spray gun, it will be charged. Because the workpiece is grounded, the charged powder coating is evenly adsorbed on the surface of the workpiece under the action of electrostatic attraction.

Step 4: Baking and curing
Baking and curing The sprayed workpiece then enters the baking and curing chamber. Under high temperature, the resin and curing agent in the powder coating react chemically to form a strong and durable coating. This process not only fixes the coating, but also gives it excellent corrosion resistance and weather resistance.

Step 5: Post processing Finally
Post-stage processing Finally, the workpiece goes through post-processing steps such as cooling, inspection and packaging to ensure that the coating quality meets the standards and is ready for shipment.
FAQ and answers by customers
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1. Why is the coating not shiny enough?
Reasons: The baking time is too long, the temperature is too high, other harmful gases are mixed in the baking, the workpiece surface is too rough, and the pre-treatment method is not selected properly.Solutions: Adjust the baking time and temperature, ensure the baking environment is clean, and select the appropriate pre-treatment method. -
2. Why does the coating change color?
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3. Why is the coating surface orange peel?
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4. Concave holes appear in the coating:
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5. Why do bubbles appear in the coating?
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6. Why is the coating uneven?
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7. Why is the impact strength and adhesion of the coating poor?
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8. Why does the coating produce pinholes?
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9. Why does a small amount of sand appear on the surface of the coating?
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10. Why does the coating fall off?
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11. Why is the powder supply uneven?
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12. Why is the powder flying and the adsorption poor?
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13. Why is the powder spraying amount small?
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14. Why is the powder spraying pipe blocked?


















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