Dutta Control Pvt Ltd. Offers Quick Exhaust Valves with 1/4"BSP Connection. Dutta Control Pvt Ltd. Supplies various types of cylinders, valves, FRLs, Connectors and hydro pneumatic pumps. The Quick Exhaust Valves with 1/4"BSP Connection is a unit that makes it possible to achieve increase piston speed on the exhaust stroke with single-acting & double-acting cylinders. The compressed air passes from the control valve to via 1 2 of the quick exhaust valve. Exhaust 3 is closed at this time. If pressure is released from 1, air is vented from 1 to 3 via the built-in silencer. For effective performance the valve must be fitted directly into the port of the cylinder.