Control valve

A control valve, comprising:

• a split valve body, the split valve body including a first body portion, a second body portion, an inlet port, an outlet port, and an input port, the first body portion including a first bore, the second body portion including a second bore and a chamber, the first bore, the second bore, and the chamber being coaxial;
• a valve seat;
• a valve plug that is movable within the first and second bores and relative to the valve seat, the valve plug movable between a closed position, in which the valve plug sealingly engages the valve seat, and an open position, in which the valve plug is spaced from the valve seat;
• a valve stem coupled to the valve plug;
• a spring seat movably disposed in the chamber;
• a spring disposed within the chamber and having a first end seated against the spring seat;
• a piston coupled to the valve stem via the spring seat, the piston being movable within the chamber;
• wherein, in response to an input received at the input port, the piston moves the spring seat and the spring seat compresses the spring and moves the valve plug, via the valve stem, between a closed position and an open position,
• wherein the valve plug comprises a first retaining ring positioned in a first groove upstream of the valve seat and a second retaining ring positioned in a second groove downstream of the valve seat, and wherein the first and second retaining rings prevent first and second seals, respectively, from moving out of the first and second bores, respectively.

A control valve, comprising:

• a split valve body, the split valve body including a first body portion and a second body portion, an inlet port, an outlet port, an input port, and a flow path, the flow path being disposed between the inlet port and the outlet port;
• the first body portion including a first bore, and the second body portion including a second bore;
• a valve seat;
• a valve plug that is movable within the first and second bores and relative to the valve seat, the valve plug movable along a longitudinal axis of the split valve body between a closed position, in which the valve plug sealingly engages the valve seat, and an open position, in which the valve plug is spaced from the valve seat;
• a valve stem coupled to the valve plug;
• a piston coupled to the valve stem, the piston movable within the second body portion,
• wherein in response to an input received at the input port, the piston moves the valve plug via the valve stem between the closed position and the open position, and
• wherein the valve plug comprises a first retaining ring positioned in a first groove upstream of the valve seat and a second retaining ring positioned in a second groove downstream of the valve seat, and wherein the first and second retaining rings prevent first and second seals, respectively, from moving out of the first and second bores, respectively.