Apparatus and method for capturing and combusting all vented natural gas and control natural gases from pneumatic controllers for oil field equipment are described. After an oil or gas well is drilled and completed, separators or treaters, as an example of oil field equipment, are installed on the surface to separate the liquids (oil/condensate and water) and gases (natural gas/methane). Pressure control valves, liquid control valves, temperature control valves, and the like, are pneumatically operated by the natural gas/methane that the separator is processing for sale, when electricity is not available to provide power for these operations. Presently, the pneumatic controllers discharge the pneumatic gas/methane to the atmosphere.

Apparatus and method for capturing and combusting all vented natural gas and control natural gases from pneumatic controllers for oil field equipment are described. After an oil or gas well is drilled and completed, separators or treaters, as an example of oil field equipment, are installed on the surface to separate the liquids (oil/condensate and water) and gases (natural gas/methane). Pressure control valves, liquid control valves, temperature control valves, and the like, are pneumatically operated by the natural gas/methane that the separator is processing for sale, when electricity is not available to provide power for these operations. Presently, the pneumatic controllers discharge the pneumatic gas/methane to the atmosphere.

A fluid shut-off device has a valve body delimiting an inlet duct and an outlet duct and having an intermediate portion delimiting an intermediate chamber that provides fluid connection between the inlet and outlet ducts. The inlet duct has an inlet duct connection edge. The intermediate chamber has a sealing surface and accommodates a diaphragm having a diaphragm sealing portion that in a closing position of the inlet duct, cooperates, by a diaphragm support surface, with the sealing surface to occlude the inlet duct. The diaphragm has a diaphragm bending portion permanently connecting the diaphragm sealing portion to the valve body to exclusively operate under bending. The diaphragm sealing portion delimits a diaphragm seat. A control element has a control stem with predetermined transverse control stem dimension and integrally received in the diaphragm seat, which transmits movement to the diaphragm sealing portion at least between the closing position and an opening position of the inlet duct.

A fluid shut-off device has a valve body delimiting an inlet duct and an outlet duct and having an intermediate portion delimiting an intermediate chamber that provides fluid connection between the inlet and outlet ducts. The inlet duct has an inlet duct connection edge. The intermediate chamber has a sealing surface and accommodates a diaphragm having a diaphragm sealing portion that in a closing position of the inlet duct, cooperates, by a diaphragm support surface, with the sealing surface to occlude the inlet duct. The diaphragm has a diaphragm bending portion permanently connecting the diaphragm sealing portion to the valve body to exclusively operate under bending. The diaphragm sealing portion delimits a diaphragm seat. A control element has a control stem with predetermined transverse control stem dimension and integrally received in the diaphragm seat, which transmits movement to the diaphragm sealing portion at least between the closing position and an opening position of the inlet duct.

A valve block includes a fluid-transfer plate with multiple inlet bores connecting to a common inlet channel, and multiple outlet bores connecting to a common outlet channel. The inlet bores and the outlet bores are arranged in a curved shape. The valve block also includes a pressure plate and diaphragm aligned and connected to the fluid-transfer plate in a way that allows pressurized material in the pressure plate to control the state of the channels formed by the inlet and outlet bores.

The disclosure provides a method for testing a solenoid valve for triggering a safety valve having a single-acting fluidic drive and a positioner. The drive fluid pressure is increased by a first pressure difference. An attempt is made to switch the solenoid valve to the safety position. The drive fluid pressure is measured at a specified point in time that is selected such that the pressure in the drive fluid lowers at most by the first pressure difference. If the pressure in the drive fluid is higher than a reference pressure at the specified point in time, the functionality test of the solenoid valve is failed. The lowering of the pressure in the drive fluid is monitored over a defined period of time to make conclusions regarding the pressure generating system. The pressure does not fall below the operating pressure so the position of the valve member remains constant.

Flow control systems and methods for controlling the flow of liquid into and out of a tubular member comprising a perforated portion that is configured to distribute a flow of liquid having a predefined fixed liquid pressure through the perforated portion to pressurize an intestine that is suspended on the tubular member is disclosed. The flow control system comprises a flow regulating valve having a slidably arranged valve structure arranged in a pressurized liquid filled water chamber and an elastic water-side diaphragm arranged in the water chamber and connected to the valve structure such that the water-side diaphragm allows the valve structure to be moved in a first direction along the longitudinal axis of the valve structure to increase the volume in the water chamber and be moved in the opposite direction to decrease the volume in the water chamber.

Pressure regulators together with associated methods and systems are provided. An embodiment of a pressure regulator includes a chamber having an inlet port for receiving a fluid and an outlet port for delivering the fluid at a regulated pressure. The pressure regulator includes a diaphragm defining at least part of the chamber, and the diaphragm defining a first orifice therethrough. The pressure regulator includes a spring configured to interact with the diaphragm. The pressure regulator includes an interface operatively disposed between the spring and the diaphragm. The interface includes a contact surface for contacting the diaphragm, and the contact surface is convex toward the diaphragm. The interface defines a second orifice therethrough that is in fluid communication with the first orifice in the diaphragm. The first and second orifices define a relief port for venting the chamber to an ambient environment external to the chamber.

A capacity control valve includes: a valve body (10) including first communication passages (11), second communication passages (12), third communication passages (13), and a main valve seat (15a); a valve element (21) including an intermediate communication passage (29), a main valve portion (21b), and an auxiliary valve portion 21c; a solenoid (30) that drives a rod (36) provided with an auxiliary valve seat (23c); a first biasing member (43) that biases in a valve closing direction of the main valve portion (21b); and a second biasing member (44) that biases in a valve closing direction of the auxiliary valve portion (21c), wherein the rod (36) moves relative to the valve element (21) to open and close the auxiliary valve portion (21c). The capacity control valve allows a liquid refrigerant to be efficiently discharged and allows a driving force of a compressor to be decreased.

A capacity control valve includes: a valve body (10) including first communication passages (11), second communication passages (12), third communication passages (13), and a main valve seat (15a); a valve element (21) including an intermediate communication passage (29), a main valve portion (21b), and an auxiliary valve portion 21c; a solenoid (30) that drives a rod (36) provided with an auxiliary valve seat (23c); a first biasing member (43) that biases in a valve closing direction of the main valve portion (21b); and a second biasing member (44) that biases in a valve closing direction of the auxiliary valve portion (21c), wherein the rod (36) moves relative to the valve element (21) to open and close the auxiliary valve portion (21c). The capacity control valve allows a liquid refrigerant to be efficiently discharged and allows a driving force of a compressor to be decreased.