2BV series liquid ring vacuum pumps are suitable for pumping the gases and steam. Its suction pressure can reach 33mbar (abs) (i.e. 97 % vacuum degree).

2BEA series water ring vacuum pumps and compressors is a kind of high-efficiency and enger-saving product developed on the basis of years of production experience and scientific research, combined with international advanced technology, typically used for pumping gas without solid particles, insoluble in water, and non-corrosive, so as to form a vacuum or pressure in a sealed container.

Water ring vacuum pump (referred to as water ring pump for short) is a kind of rough vacuum pump, which can obtain 4~8kPa ultimate pressure for the single-stage pump, and 2~4kPa for 4 ~ 8kPa for the two-stage pump.

2SK water ring vacuum pump is a kind of rough vacuum pump, which can obtain 2~4kPa ultimate pressure. Pumps of this series possess compact structures, and are reliable to use, convenient to install and disassemble, and easy to maintain.
As the gas compression process of the water ring pump is under isothermal condition, the flammable and explosive gases can be exhausted, as well as gases containing dust and water; Therefore the application of the water ring pump is growing.

Roots vacuum pump (referred to as roots pump for short) is a non-internal compression type rotary positive displacement pump, which achieves suction and exhaust by two 8-shape rotors rotating in the pump shell. Its principle is similar with roots blower. As it works within the low pressure range, the free paths of the gas molecules are long, and the resistance is strong for gas to pass through small gaps, thus, it is able to obtain a higher compression ratio, and can be used as a booster vacuum pump; but it can not directly exhaust the gas into the atmosphere alone, and it shall be connected with a fore vacuum pump in series, and exhaust the pumped gas into the atmosphere through the fore vacuum pump.

2XZ series vacuum pump has bipolar direct connecting structure, the working performance Is consisted of high pressure and low pressure grades. The inhalant hole Connects with vacuum equipment, the air in the container will be inhaled and exhausted Greatly while running.

The functional diagram of rotating vane pumps is shown in the figure. The rotating vane pump mainly consists of the stator, rotor, rotary vane, fixed cover, spring and components. The structure is formed by rotor which eccentricly installed in the chamber of the stator (the outer circle of the stator is tangental to the inner surface of rotor, and the gap between the two is very small) and the two rotary vanes which adhere to the inner wall of the stator with the assistance of spring tension and centrifugal force and slide in the rotor slot, and when the rotor rotating, the two rotary vanes are always sliding along the inner wall of the stator.

WLW vertical oil-free (corrosion-resistant) reciprocating vacuum pump is the upgraded product to replace W horizontal vacuum pump, and the principal equipment to obtain rough vacuum.

JZJS roots vacuum set is made up of the series connected roots pump and liquid ring pump, where the roots pump is the main pump and the water ring pump is used as the backing pump.