1. Use oil-free vacuum pump as a negative pressure source, the system would not produce pressure; equipped with an overflow protection device
2. The air filter can prevent negative pressure pump pollution.
3. The negative pressure control apparatus is capable of locking function; the negative pressure value can be set according to the requirements
4. Its liquid bottle made of transparent plastic, easy to disassemble and clean.
5. Compact in size, simple to handle, made of high-quality material, portable for carrying around
6. Stable and reliable performance, high-efficiency for continuous drainage liquid