Single stage water ring pump, two stage water ring pump, single stage rotary vane pump, two stage rotary vane pump.
The two-stage rotary vane pump with the highest vacuum degree among these four pumps has an ultimate vacuum degree of -2pa and a pumping speed of 70 L/s.
The second is the stand-alone film selection pump. The ultimate vacuum of the X series can reach 2 Pa, and the pumping speed is 150 L/S.
The pumping speed of water ring pump is higher than that of rotary vane pump, but the vacuum degree is not as high as that of rotary vane pump, 3 000 to 4000 Pa.
There is a round hole in front of the exhaust hole of the pump disc, and the round hole is closed by a rubber (rubber) ball valve when the pressure gas between the impeller blades reaches exhaust pressure. , the gas is automatically released in front of the exhaust portappement. Reduce power consumption due to excessive gas pressure.
In the water ring pump, the auxiliary exhaust valve is a special structure. , usually using a rubber ball valve. Its function is to eliminate the phenomenon of overcompression and undercompression during pump operation, because the water ring pump does not have a direct exhaust valve and exhaust. The pressure is always fixed, the water ring pump. The pump compression ratio is determined by the final position of the air inlet and the starting position of the exhaust port. However, these two positions are fixed and therefore cannot adapt to changes in suction. In order to solve this problem, the exhaust port is usually installed. A rubber ball valve is installed under the port so that when exhaust pressure is reached prematurely in the chambermber of the pump, the ball valve opens automatically and the gas is discharged, eliminating the pressure. Overcompression phenomenon. Generally, when designing a water ring pump, the compression ratio is determined based on the lowest suction pressure. This is used to determine the starting position of the exhaust port, thereby solving the phenomenon of insufficient compression. >