一、Features: 
1. There is no metal friction surface in the pump chamber, and no spark will be generated which meets the safety requirements.
2. High rotating speed, large displacement, effective and rapid extraction of gas and other mixed gases.
3. Seal between rotating parts and fixed parts can be directly completed by water seal.
4. The temperature change of the compressed gas process in the pump chamber is very small, similar to isothermal compression; it has high safety performance for flammable and explosive gases such as gas drainage.
5. High energy efficiency, strong environmental adaptability, high operational reliability and low noise
6. Simple structure, easy operation and convenient maintenance.2 BEP 40, 0, 2 -- B, D, 3, C
二、Model Description: 

2 BEP 40, 0, 2 -- B, D, 3, C

2BEP -- liquid ring vacuum pump series code

40 -- Nominal radius of impeller (unit: cm)

0 -- Pump body has no partition code." 0" no divider, 6" no divider.

2 -- Minimum suction pressure up to 160mbar.

B --  Structural material code." B" is ordinary material;" B1" main flow parts spray polymer materials;" E" grey cast iron/nickel chromium stainless steel;" F" nickel chromium stainless steel.

D -- Transmission code. " D" direct transmission;" V" belt drive, "G" reducer drive.

3 -- shaft seal form code: "3" is outer water supply packing seal;" 4" for internal water supply packing seal;" 2" is a single-face mechanical seal;" 5" double end mechanical seal.

C -- Pump speed code (unit: r/min)

三、Spectrogram: 
四、Application field: 
Coal mine: gas drainage, vacuum dewatering, etc
Petrochemical industry: gas pressure, vacuum system
Paper industry: vacuum dehydration
Iron and steel metallurgy: vacuum dewatering
Cigarette industry: cigarette machine negative pressure system, vacuum moisture-proof