What is a Rotary Vane Vacuum Pump?
The rotary vane vacuum pump, or rotary vane pump for short, is a kind of oil-sealed mechanical vacuum pump and also a kind of positive displacement pump. Belonging to coarse vacuum pump, its working pressure is from 101325Pa to 1.33×10-2Pa. With the help of the continuous operation of rotary vane in the pump cavity, the pump cavity is divided into two different areas and their volumes expands and shrinks periodically. The gas can be sucked, compressed and discharged so that the container can be vacuumed.
How does a Rotary Vane Vacuum Pump Work?
A rotor is arranged in the pump chamber, and a rotary vane is arranged in the rotor slot. When the rotor drives the rotary vane to rotate, the rotary vane is closely attached to the chamber wall, and the inlet and exhaust ports are separated. The volume of the intake manifold is periodically expanded to inhale, and the volume of the exhaust chamber is periodically reduced to compress the gas. The exhaust valve is exhausted to obtain a vacuum. Its working performance consists of two parts: high pressure stage and low pressure stage. Its suction port is connected with vacuum equipment. When operating, the gas in the container is inhaled and discharged in large quantities. When the equipment is vacuumed, the high pressure stage exhaust valve is closed and the high pressure is closed. The gas at the stage inlet will be transferred to the second stage, and a certain vacuum can be obtained by inhaling and discharging the vacuum device through the second stage.
What is the Use of a Rotary Vane Pump?
The rotary vane vacuum pump is a basic equipment used to extract gas from sealed containers to obtain vacuum. It can be used alone and can also be used as the front stage pump and pre-pump of various high vacuum systems.
The pumps have the advantages of low noise, no return of oil when stopping, easy start-up and other merits. The pump is equipped with a gas ballast valve, which can remove a small amount of condensable steam. The pump can not be used to remove gas containing too much oxygen, corrosive, explosive or poisonous gas (except for explosion-proof 2XZ series), and gas containing particle dust, and it can not be used as compression pumps or gas delivering pumps.
The pumps are suitable for industrial sectors, scientific research institutes and universities and colleges, which are indispensable basic equipment for various vacuum operating systems. The explosion-proof series are applicable for laboratory, chemical plant, oil depot and other inflammable and explosive special occasions.