Ported Vacuum Switches: Description

The Ported Vacuum Switches (PVS) are temperature sensitive vacuum controlling devices. The two port and three port PVS valves have three temperature ranges. Green PVS is calibrated at 68°F (20°C), Black PVS is calibrated at 100°F (38°C), and plain or Blue PVS are calibrated at 133°F (57°C).

The electric PVS is a combination vacuum switching and electric signalling device. There are two versions of the electric PVS valve, one with normally closed contacts and one with normally open contacts.