NGT’s D4A000V is a dual pneumatic check valve that maintains cylinder position by locking air in both cylinder ports. NGT’s dual pneumatic locking valves perform the work of two PO check valves but in one valve package. Dual pneumatic check valves work well in horizontal applications by ensuring precise stopping. The D4A000V also works well in the vertical position by reducing bounce compared to a standard pneumatic PO check valve. The D4A000V has 1/4 NPTF in/out ports, high temperature seals, and no manual release. The D4A000V also can accommodate as low as 40 psi pilot pressure.