Patent ID: 11905782
Assignee: NATIONAL COUPLING COMPANY, INC.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC E  F | IPC E

Claim 7:
8. An apparatus for a subsea control module used in a subsea environment, the apparatus comprising:
a gate valve having flow connections and having a gate movable between the flow connections;
an actuator connected to the gate valve and being configured to move the gate in response to hydraulic pressure;
a directional control valve having: an input in communication with a hydraulic fluid supply, a vent in communication with the subsea environment, a pilot in communication with a pilot supply, and an output, the directional control valve configured in closed and opened states in response to the pilot supply at the pilot, the directional control valve in the opened state communicating the hydraulic fluid supply at the input with the output, the directional control valve in the closed state communicating the output with the vent; and
a regulator having a supply and an outlet and having a seal arrangement between the supply and the outlet, the supply in communication with the output of the directional control valve, the outlet in communication with the actuator, the regulator being configured to reduce hydraulic fluid pressure of the hydraulic fluid supply communicated from the supply to the outlet, the seal arrangement being configured to prevent communication of the hydraulic fluid pressure on the outlet to the supply, the regulator having a check valve connecting the supply with the outlet, the check valve being configured to permit at least a portion of the hydraulic fluid pressure at the outlet to bypass the seal arrangement from the outlet to the supply of the regulator to the directional control valve.