Control for interlinking of multistage vacuum pumps - has connection channel between pump stages with stroke valve, coupled to discharge valve

摘要

The connection channel (13) between the pump stages, or one of its ends, carries a valve (18). The sealing part (19) of the valve is coupled in opposite active direction, with the sealing part (14,15) of the neighbouring discharge valve (11). It may be coupled to the sealing part of the valve, located in the intake tube of the second pump stage, or to both sealing parts. The valve is formed as a stroke valve, and is located near the discharge valve of the first pump stage. Its sealing part consists of a piston (19), moving in a bore (17) at right angles to the connection channel. USE/ADVANTAGE - Control for interlinking multistage vacuum pumps, giving improved intake performance and ultimate pressure.