The ME990 Series internal valves are intended for use on bobtails, transport trucks, and storage tanks in directional or bi-directional flow applications. Can be equipped with manual latch, pneumatic, or rotary actuator devices.

Marshall Excelsior manufactures a variety of sizes and configurations of flanged internal valves for use on bobtail delivery trucks, transport trucks, and large storage tanks. All valve models are equipped with a break-away feature in the cast body which permits the pump or piping to shear off in the event of side impact, leaving the valve poppet intact and protecting the tank from catastrophic product loss.