Vacuum Check Valves

The Vacuum Check Valve is designed to prevent the reverse flow of ambient air into a vacuum system. Vacuum Check Valves are used to hold vacuum downstream whenever the vacuum source is removed or lost. Internally, a normally closed valve allows vacuum flow in the pump direction but seals off when vacuum flow ceases. When a Vacuum Check Valve is used in a system, some provision must be made to release the trapped vacuum in order to release the work piece. The RC18A and RC18-040A Release Check Valves are designed for this purpose.

One application for the Vacuum Check Valves is for energy saver circuits using a vacuum storage tank to accumulate and store vacuum for high-volume, short duration flow rate requirements.

More commonly, a Vacuum Check Valve with Release Check Valve would be used with a single vacuum cup so a non-porous, high value work piece would not be immediately dropped if the system's vacuum source is lost.

VC18

The VC18 should be used with cup diameters of 50 mm and smaller.

Weight: .15 lbs (68 g)

VC12

The VC12 should be used with cup diameters of 75 mm and larger that are available with G 1/2" NPS female fittings.

Weight: .19 lbs (86 g)