What are the differences between large liquid electrostatic rotary bell spray guns and small, lightweight liquid electrostatic rotary spray spray guns?

What are the differences between large liquid electrostatic rotarybell spray guns and small, lightweight liquid electrostatic rotaryspray spray guns?

In the coating industry, 'large liquid electrostatic bell cup spray gun' and 'small liquid electrostatic rotating bell spray gun' are usually not official standard terms, but are colloquial names in the industry for liquid electrostatic cup spray guns of different sizes, flow rates, or application scenarios. According to public information, the main differences between the two are reflected in the following aspects:

Core difference

Cup dimensions and Rotation Speed of the
Large bell cup spray gun: The atomization bell cup diameter is relatively large (commonly over 50mm), and the operating speed is generally 45,000–75,000 r/min, suitable for high flow and large area spraying.
Small atomization bell cup spray gun: The bell cup diameter is relatively small such as below 20mm 30mm, and the rotation speed can reach 60,000–120,000+ Rpm/min, suitable for fine spraying, small areas, or complex-shaped workpieces.
Coating Flow and Atomization Effect
Large cup: Spray width 100–500mm or more, maximum flow rate 500 cc/min, and maximum air consumption 1.0 Nm³/min, better for achieving efficient spraying on large, smooth workpieces

Small Spray bell Cups: The Potential Spray Advantages of Small Spray Cups with 80-150mm Spray Width Compared to Large Spray Cups
More Suitable for Fine or Complex Workpieces: Small spray cups have a smaller spray width and more concentrated paint mist, making them suitable for corners, narrow gaps, small or structurally complex workpieces, reducing overspray and waste.
Higher Spraying Accuracy: In robotic automatic spraying, small spray cups facilitate high-precision path following, suitable for surfaces with high requirements such as automotive interior parts, home appliance panels, and food metal molds, achieving high-efficiency spraying.
Faster Color Change and Easier Cleaning: Small spray cups have a small internal volume, requiring less solvent and less time for color changes or cleaning, improving multi-color production efficiency.
Quick Start and Acceleration: Some small spray cups can reach high speeds (e.g., 75,000 rpm) within seconds, responding faster and suitable for production lines with tight cycles.
Lower Energy and Air Consumption: Small spray cups require less compressed air and electricity to operate, reducing operating costs over long-term usage.

Function Description of smart rotating bell electrostatic spray gn:

Under the action of high-speed rotation and centrifugal force of the rotary cup, the coating separates fromtherotarycupbyforming fiber filaments through the small teeth around the rotary cup Under the action of high charge, the coating achieves particle size and is evenly distributed in the sprayingspace. Coatingseffectively adsorb onto workpieces with positive charges by carrying high-voltage negative charges, greatly improvingcoatingefficiency, achieving uniform coating, and enhancing

Specifications：

1、HDA-605 high speed pneumatic motor

2、（MAX)：DC 20-80KV,Adjustable

3、H.V Power pack：External

4、rotating speed（unload）：120000rpm /min (max)

5、driving method：air turbine motor

6、weight：0.6KG（single bell gun without any cable）

Parameter：

1. Atomization bell cup Φ20mm

2. Spray width: 80-150mm

3. Max flow rate: 200cc/min

4. Max output current :300“μAm

5. Max air Consumption: 0.75Nm³

6. Installation method: Fixed, reciprocating machine or Robot Function

description: Flexible application with small bell cup as 20mm, and 0.6kgs weight, apply for multi- axis reciprocators and coatingmachines, provide for multiple spray gun arrangement, flexible application in the spray space for as narrowshapeandmultiple of workpiece, it is the smart automatic electrostatic rotating bell spray gun in the coating industry.