manual valve / shut-off / for compressed air / 3-way

This shut-off valve is utilized to make the circuit independent from the air supply. It is a 3-way valve that is particularly useful for servicing operations as it cuts off the air supply when its in a closed position and also discharges the downstream circuit. To ensure that it is only opened by someone with the right key, the hand-operated version can be padlocked to lock the knob in a closed position. For low pressure operation, an interlocked version is available.

When the V3V is mounted upstream of the regulator for size 400, it is essential that the pilot regulator is piloted at a pressure taken upstream of the V3V. If this is not adhered to, the air downstream will be relieved by the regulator as opposed to the relief port.