What's the difference between an overflow gun and a shut-off gun?

What's the difference between an overflow gun and a shut-off gun? The shut-off gun you mentioned is most likely a stop-flow gun (also commonly called a cut-off gun). As common spray guns for high-pressure cleaners, the core differences lie in their structure and pressure relief methods, as detailed below:

1. Structure and Material: Stop-flow guns have a simpler structure, often with a plastic handle, and are lighter (e.g., one model weighs approximately 2.4 kg). Overflow guns are made entirely of metal and have an overflow port, making them heavier (e.g., the K90 model weighs approximately 4 kg).

2. Pressure Relief Method: With a stop-flow gun, pressure is trapped inside the pump after the gun is turned off. With an overflow gun, the pressure inside the pump is released through its overflow port after the gun is turned off, preventing pressure buildup in the system.

3. Equipment Wear and Tear: Prolonged pressure buildup when the stop-flow gun is off can damage the pump's seals and pressure regulating valve. The overflow gun, due to its timely pressure relief, causes less wear and tear on the pump and other components of the cleaning machine, providing better protection.

4. Applicable scenarios: The intercepting gun is suitable for ordinary cleaning scenarios with low pressure; the overflow gun is suitable for high-pressure and high-intensity operations, and is more commonly used in scenarios such as descaling and rust removal of industrial equipment.