一、Features: 
1. Safe operation, compact structure, high automation and remarkable energy saving effect.
2. Complete equipment of the unit to meet different requirements.
Provided with a heat exchanger to realize that work liquid closed cycle. In addition to using water as working fluid, it can also use special liquid such as glycol, diesel oil and DOP as working fluid.
A gas-liquid separation tank is provided to effectively separate the gas-liquid mixture discharged from the vacuum pump, After the liquid is cooled by the heat exchanger, it returns back to the vacuum pump through the self-suction of the pump as the circulation supplement of the working liquid, which reduces the sealed liquid temperature in the pump and produces a good effect. The gas is discharged to the designated place through the exhaust port of the separator. It is especially suitable for sucking inflammable, explosive and poisonous gas.
3. There are various options for liquid level control to meet different needs.
Manual level control: when the unit is working, the exhaust gas will take away a small amount of liquid steam, causing the level to drop. The working fluid can be added to the unit by manually adjusting the valve.
Electric type liquid level control: install the solenoid valve of replenishing and discharging liquid on the gas-liquid separator. When the unit level exceeds the lower limit, the solenoid valve of replenishing liquid will open automatically and replenish liquid to the unit.
When the working fluid exceeds the upper limit of the liquid level, the drain solenoid valve opens automatically, discharging excess liquid. The relevant signals can be connected to DCS according to the requirements of users.
Mechanical automatic level control: a mechanical level controller is installed on the gas-liquid separator to control the level through replenishment or discharge.
二、Model Description: 

Description method of unit model

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14

T, F, V, P

1, 2, 3, 4, 8 -- single stage liquid ring vacuum pump

5, 6 -- nominal radius of impeller (cm)

7 -- code name for impeller width and diameter ratio

9 -- minimum suction absolute pressure

10 -- pump structure material code

11 -- transmission code

12 -- shaft seal type code

13 -- code number of direction of pump exhaust port

14 -- code of rotation

三、Spectrogram: 
四、Application field: 
Power industry: condenser vacuum, negative pressure transport, desulphurization circulation device gypsum dehydration.
Coal industry: washing and selection vacuum dewatering, mine gas emissions, filtering equipment.
Paper industry: vacuum dehydration, degassing, pressure blower.
Food and beverage: vacuum packaging of food, vacuum freeze drying, beverage vacuum cans.
Plastic machinery: extrusion, vacuum molding.
Mining metallurgy: cleaning and vacuum dehydration, filter matching.
Tobacco industry: cigarette machine negative pressure system, vacuum moisture return system.
Petrochemical industry: filtration, pressure swing adsorption, decarbonization, hydrogen extraction, oxygen production, purification, vacuum distillation, vacuum crystallization, pressure transmission flammable, explosive gas.
Textile industry: yarn steam stereotyped, colored carpet drainage and drying.
Wood processing industry: wood drying, wood preservation, wood impregnating.
Medical industry: vacuum sterilization, sewage discharge, saliva suction device and so on.
Oilfield production: water injection deoxygenating.
Sugar industry: pressure delivery of CO2 gas.
Aerial testing: upper-air simulation.