Combination Valve Seal-Vent

Valve mounted above the Vacuumpump.
.
Open valve.
When the solenoid valve is energized (simultaneously with the vacuum pump), the atmospheric vent port
is closed, and the channel of the body and the top of the piston are opened. If the pressure at the vacuum pump
side decreases, the pressure at the top of the piston also decreases via the channels of the shaft and the body. The
pressure difference generated at that time makes the piston move upward. If the pressure decreases more, the
channel of the shaft is closed, but the pressure at the top of the piston decreases much more via the channel of the
body, and it opens the valve.
.
Close valve.
When energizing to the solenoid valve is stopped (simultaneously with the vacuum pump), the channel of
the body is closed, and the atmospheric vent port and the top of the piston are opened. As the top of the piston
gets atmospheric pressure via the atmospheric vent port, the valve is closed as the piston moves downward with the
built-in spring. When the piston moves downward further, the channel of the shaft is opened, and it leads
atmosphere to the vacuum pump side.

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