Differences Between Laboratory Vacuum Pump and Ordinary Vacuum Pumps

The laboratory vacuum pump is a vacuum pump product specially designed for use in the laboratory, which can be used with various experimental equipment, such as a vacuum drying oven, rotary evaporator, centrifugal concentrator, vacuum filtration system, solid phase extraction instrument, etc. Due to the highly targeted special purpose, the material, structure, principle, accessory configuration, product vacuum degree, and pumping speed performance of gas contact are very different from general vacuum pump products. Hawach provided Standard Diaphragm Vacuum Pumps and Anti-Corrosion Diaphragm Vacuum Pump for your choice.

Differences between laboratory vacuum pumps and ordinary vacuum pumps

The vacuum pump for laboratory suction filtration refers to a vacuum pump specially used with a filter device. Its function is to draw out the air inside the filter system so that a pressure difference is formed inside and outside the system so that the outside air can push the filtrate through the filter membrane. Due to the particularity of the application field, the vacuum pump for laboratory filtration is quite different from the ordinary vacuum pump in terms of structure, material, performance, and accessory configuration, mainly including the following aspects:

SLVPGM050A-Standard-Diaphragm-Vaccum-Pumps SLVPGM100A-T-Anti-Corrosion-Diaphragm-Vaccum-Pumps SLVPGM050B-Standard-Diaphragm-Vaccum-Pumps

a. Dry-running, the oil-free structure is required:
Since the traditional rotary vane vacuum oil pump needs to add pump oil before use, the circulating water vacuum pump needs to add tap water to the water tank, and all need to rely on other media to operate, which will cause two inconveniences in use: the oil tank or the water tank. The pump oil is sucked back into the filter bottle under unbalanced internal and external pressure, contaminating the filtered liquid; the use site is limited, for example, it cannot be used in the cell room with high cleanliness requirements. Therefore, the suction filter pump used with the filter equipment must first adopt an oil-free dry design.

b. With buffer bottle to prevent backflow:
Waste liquid sucking back is a common problem in vacuum filtration operations. The reasons for sucking back are more complicated, mainly because the liquid level of the waste liquid bottle is too full, the upper liquid overflows or is carried out by the gas, a small amount of liquid is carried into the pump by the airflow, and the air The water in the pump is sucked into the pump and liquefied due to temperature changes. If the suction protection is not carried out, the suction liquid will accumulate in the pump for a long time or suck too much liquid at one time, which will cause direct damage to the equipment.

c. Observable and adjustable pressure:
Some national standards and user test methods will have clear requirements for specific suction filtration pressure. At the same time, some filters and filter membranes also need to be pressure adjusted due to material reasons, so as not to damage the filter membrane and explode the filter bottle.

Features of Laboratory Vacuum Pumps

(1) Working principle: An elastic diaphragm installed on the eccentric shaft makes a linear reciprocating motion driven by the motor so that the cavity is deformed, and the medium is drawn and discharged. The pump is completely transferred evacuation and compression. It is oil-free, to achieve pollution-free transmission.
(2) Structure: The design of the internal structure is compact, it will not occupy the space of the laboratory, the volume is small, it is easy to carry, and the loading and unloading operation is simple and easy to learn.
(3) Material: all PTFE material, resistant to strong acid and alkali gas and steam medium.
(4) Function: It can work continuously for 24 hours. HAWACH introduced that there is no need to worry about the pump itself terminating the test due to overheating; non-polluting medium transmission, vacuum extraction, and pressure compression, and finally to ensure dry operation, no oil mist pollution, less maintenance, lower use cost, improve work efficiency, designed self-cooling exhaust system, which can work for a long time to make the laboratory cleaner. Its functional advantages are as follows:

a. High-strength corrosion resistance: The full Teflon diaphragm vacuum pump can resist any strong chemical corrosion, such as hydrochloric acid, nitric acid, HF, chlorine, bromine water, dichloromethane, benzene, toluene, and other chemical corrosion;
b. Ultra-high vacuum, and easy to control accurately and stably, even high-boiling solvents such as DMSO and DMF can be quickly evaporated, thus greatly improving work efficiency
c. The diaphragm vacuum pump can also realize the complete recovery of solvents, efficiently eliminate toxic and harmful organic solvents, reduce environmental pollution, and harm the health of operators and nearby personnel, even if the mixed solvent can be highly recycled and utilized;
d. The vacuum pump is a dry pump without water and oil, which can make the laboratory cleaner and quieter, and the operator does not need to regularly clean, change pipes, change the water, and other maintenance work, and the diaphragm vacuum pump is 100% maintenance-free.