What should be paid attention to when checking the oil level and vacuum degree of the direct coupled vacuum pump?

The direct connection vacuum pump is a kind of positive displacement pump. With the help of the sliding vane, it continuously operates in the pump chamber, so that the volume of the pump chamber divided into two different areas by the sliding vane periodically expands and contracts. The gas is inhaled, compressed and discharged, so that the container is evacuated. The utility model has the advantages of low noise, no oil return when the pump is stopped, easy starting, etc. The pump is equipped with a ballast valve to pump out the specified condensable steam. This kind of pump cannot pump out the gas with excessive oxygen content, corrosiveness, explosive or toxic, and dust, nor can it be used as a compression pump or gas pump.

Direct coupled vacuum pump of main features

Simple structure, no need for suction and exhaust valves, stable and reliable operation, no mutual friction between metal surfaces in the pump, suitable for filtering, vacuum drying, sterilization, pneumatic conveying, etc. It is also used for single-stage or multi-stage fire pump or marine pump to inject water into vane pump as a vacuum pump. The water pump has single chamber and double chamber structure.

There is no metal friction surface in the pump chamber, so there is no need to lubricate the pump. The sealing between the rotating part and the fixed part can be directly completed through the water seal. The temperature change of gas during compression in the pump chamber is very small, which can be considered as isothermal compression, so flammable and explosive gas can be extracted. The pump with compact structure and high speed can be directly connected with the motor without reducer. Therefore, with small structure size, large displacement can be obtained and the occupied area is small.

Direct coupled vacuum pump of check the oil level and vacuum

When the pump stops, check the oil level and add oil to the center of the oil pointer. Too low exhaust valve can not play the role of oil seal, affecting the vacuum degree. If it is too high, fuel injection may occur when starting in the atmosphere. During operation, the oil level rises, which is normal. The oil for direct connection vacuum pump shall be clean vacuum pump oil of designated brand, which shall be added from the oil filling hole. After refueling, screw on the plug. The oil shall be filtered to prevent impurities from entering and blocking the oil hole.

Check the limit vacuum of the vacuum pump with a compression vacuum gauge. If the pressure gauge has been fully pre pumped and calibrated, the pump temperature is stable, and the port of the direct rotary vane vacuum pump is directly connected to the pressure gauge, the limit vacuum will be reached within 30 minutes of operation. The value measured by the total pressure gauge is related to the error of pump oil, vacuum gauge and pressure gauge. Sometimes, the error can be very large and can only be used as a reference.

The direct connected vacuum pump provides vacuum conditions for evaporation, distillation, crystallization, drying, sublimation, filtration and decompression, degassing, solvent recovery, extraction of various highly toxic, flammable and explosive, strong acid and strong alkali. In addition to the application of circulating water vacuum pump and rotary vane vacuum pump, it is also used in medical and pharmaceutical product analysis, fine chemical industry, biochemical pharmacy, food inspection and other fields. It is a supporting product for its precision chromatographic instruments, and is also one of the necessary equipment for the laboratory.