Self sealing valves (Schrader type)

The outlet points from which gases & vacuum are drawn are of self sealing typ e and hav e non-interchangeable outlet fittings. The supply is established simply by inserting the appropriate safet y key plug into the orifice of the outlet point and pressing it home until it locks in position. To break the connection, the milled collar round the orifice is rotated a few degrees to the right, when the safet y key plug is automatically ejected and the gas flow is cut off.