How to use solenoid valve with vacuum pump
You can't use that solenoid valve on a vacuum system.



Figure 1. Details printed on the valve body.


It requires at least 0.15 MPa to operate. Vacuum will be negative.
It is pilot operated. The internal spool is moved by compressed air. You'll have rarified air.
The solenoid opens the pilot to allow air to move the spool.
It's spring return.
It has air assist on the return.


You need a direct acting 3/2 (3-port, 2-way) direct solenoid valve.