Patent ID: 7213502

Claim:
A valve assembly comprising: a poppet valve assembly including a poppet valve member and a fluid passage extending between a first port and a second port, and the fluid passage including a valve seat, and the poppet valve assembly having a control chamber disposed therein; and the poppet valve member includes a control hydraulic surface exposed to hydraulic pressure inside the control chamber, and the poppet valve member being movable to a position in contact with the valve seat, and the poppet valve member having a plurality of positions with different flow areas across the valve seat; and a pilot valve assembly fluidly connected to the poppet valve assembly, and having a first configuration wherein the first port is fluidly connected to the control chamber, and having a second configuration wherein the second port is fluidly connected to the control chamber, and having a third configuration wherein the control chamber is fluidly isolated from the first port and the second port.