Abstract: A modular valve system includes a modular valve body having an inlet, an outlet, a through-hole, and a fluid flow path between the inlet and the outlet. The modular valve body is used to assemble any one of a pressure regulating valve, a slam-shut valve, or a flow control valve, and the through-hole is configured to receive a component of any one of the pressure regulating valve, the slam-shut valve, and the flow control valve.

Abstract: A regulator includes a valve body and a control element movable between a closed position, in which the control element engages a valve seat, and an open position, in which the control element is spaced away from the valve seat. A stem is operatively coupled to the control element and is axially aligned with a longitudinal axis of the valve body. An indicator assembly is at least partially disposed in the valve body and is operatively coupled to the stem. The indicator assembly includes a rod operatively coupled to the stem and an indicator operatively coupled to the rod. The indicator is arranged to display a position of the control element. The rod of the indicator assembly is movable by the stem between a first position when the control element is in the closed position, and a second position when the control element is in the open position.

Abstract: A fluid regulator includes an actuator assembly disposed in a valve body. A sleeve includes a cylindrical wall, a first plate, and a second plate. Each of the first plate and the second plate is disposed in a cavity of the sleeve. A stem extends through the sleeve and is axially aligned with a longitudinal axis of the body, and includes a passage extending partially through the stem. The actuator assembly includes first and second pistons. First, second, third, and fourth chambers are separately disposed between the sleeve, the first or second plate, or the first or second piston. The first and third chambers are in fluid communication, and the second and fourth chambers are in fluid communication via the passage of the stem. The actuator assembly actuates a control element in response to a fluid pressure receivable in the first, second, third, and/or fourth chambers.

Abstract: A fluid control device includes a body having an inlet, an outlet, and a fluid flow path between the inlet and the outlet, a seat, and a control element that is coupled to a stem. The control element and the stem are movable along a first axis and biased toward a closed position in which the control element engages the seat. The fluid control device includes an actuator assembly including a shaft that is operatively coupled to the stem via a Scotch yoke mechanism such that rotation of the shaft in a first rotational direction causes movement of the stem and control element along the first axis in a first translational direction. The actuator assembly includes a trigger mechanism that is responsive to fluid pressure and prevents rotation of the shaft in a first mode of operation and releases the shaft to allow rotation in a second mode of operation.

Abstract: A flow control device includes a valve body defining an inlet, an outlet, and a flow path. A valve seat assembly includes a fitting coupled to the valve body, a seat ring coupled to the fitting and defining a valve seat. The seat ring includes an inner groove formed on an interior surface of the seat ring. A control element is movable relative to the valve body between a closed position, in which the control element engages the valve seat, and an open position, in which the control element is spaced away from the valve seat. The seat ring is coupled to the fitting by snap-fit connection such that a portion of the fitting is disposed in the inner groove of the seat ring.

Abstract: A fluid regulator includes an actuator assembly disposed in a valve body. A sleeve includes a cylindrical wall, a first plate, and a second plate. Each of the first plate and the second plate is disposed in a cavity of the sleeve. A stem extends through the sleeve and is axially aligned with a longitudinal axis of the body, and includes a passage extending partially through the stem. The actuator assembly includes first and second pistons. First, second, third, and fourth chambers are separately disposed between the sleeve, the first or second plate, or the first or second piston. The first and third chambers are in fluid communication, and the second and fourth chambers are in fluid communication via the passage of the stem. The actuator assembly actuates a control element in response to a fluid pressure receivable in the first, second, third, and/or fourth chambers.

Abstract: A fluid control device comprising including a body having an inlet, an outlet, and a fluid flow path between the inlet and the outlet, a seat, and a control element that is coupled to a stem. The control element and the stem are movable relative to a longitudinal axis and biased toward a closed position, in which the control element engages the seat. An actuator assembly is operatively coupled to the stem and includes a planetary gear transmission mechanism configured to receive a first rotational velocity and to deliver a second rotational velocity different than the first rotational velocity. A shaft has a first end coupled to the transmission mechanism and a second end coupled to valve stem. The second rotational velocity is transmitted to the valve stem to move the control element between the closed position and an open position.

Abstract: A fluid control device includes a body having an inlet, an outlet, and a fluid flow path between the inlet and the outlet, a seat, and a control element that is coupled to a stem. The control element and the stem are movable along a first axis and biased toward a closed position in which the control element engages the seat. The fluid control device includes an actuator assembly including a shaft that is operatively coupled to the stem via a Scotch yoke mechanism such that rotation of the shaft in a first rotational direction causes movement of the stem and control element along the first axis in a first translational direction. The actuator assembly includes a trigger mechanism that is responsive to fluid pressure and prevents rotation of the shaft in a first mode of operation and releases the shaft to allow rotation in a second mode of operation.

Abstract: A regulator is disclosed that controls fluid flow through a control valve via a linkage including a lever that is acted upon by a spring cylinder acting in a direction perpendicular to the direction of fluid flow through pipes connected to the control valve. The closure performance of the control valve of the regulator is optimized by the direction the spring cylinder acts and the mechanical advantage the lever provides. The regulator further includes a diaphragm and diaphragm cover, and the regulator is configured to allow the diaphragm cover to be stamped rather than cast.

Abstract: An assembly for and part of a slam-shut safety device. The assembly includes a reset pin and a valve disc operatively connected to the reset pin, the reset pin and the valve disc being movable between a first position, in which the valve disc is adapted to be spaced from a slam-shut valve seat of the slam-shut safety device, and a second position, in which the valve disc is adapted to engage the slam-shut valve seat of the slam-shut safety device. The assembly also includes a reset pin assembly including a reset rod operatively connected to the reset pin, and a reset sleeve arranged to support an end of the reset rod. The assembly further includes a feedback system arranged proximate the reset pin assembly and configured to provide data indicative of whether the reset pin and the valve disc are in the first position or the second position.

Abstract: An actuator of a regulator is connected to one end of a valve rod. The actuator includes a shell, a limiting component, a diaphragm assembly, and an elastic element. The diaphragm assembly is movably sleeved on the valve rod. Further, the elastic element is coupled to the diaphragm assembly and is movably sleeved between the diaphragm assembly and a tip of one end of the valve rod, in a compressed state. An inner diameter of a portion of the limiting component is smaller than an outer diameter of an upper portion of the diaphragm assembly. The limiting component is located above the diaphragm assembly.

Abstract: An assembly for and part of a slam-shut safety device. The assembly includes a reset pin and a valve disc operatively connected to the reset pin, the reset pin and the valve disc being movable between a first position, in which the valve disc is adapted to be spaced from a slam-shut valve seat of the slam-shut safety device, and a second position, in which the valve disc is adapted to engage the slam-shut valve seat of the slam-shut safety device. The assembly also includes a reset pin assembly including a reset rod operatively connected to the reset pin, and a reset sleeve arranged to support an end of the reset rod. The assembly further includes a feedback system arranged proximate the reset pin assembly and configured to provide data indicative of whether the reset pin and the valve disc are in the first position or the second position.

Abstract: A pressure regulating valve including an actuator and a valve body. Communicating passages are arranged between a chamber of the valve body and a chamber of the actuator. Further, a pressure tapping tube is disposed in the chamber of the valve body. One end of the pressure tapping tube is connected to the communicating passage and the other end of the pressure tapping tube is suspended. By adopting this pressure tapping structure in the pressure regulating valve, the performance of the pressure regulating valve in a flow accuracy range is improved.

Abstract: A balancing valve spool and a pressure regulating valve including the balancing valve spool. The balancing valve spool includes a valve rod having a first end and a second end. The valve rod defines a longitudinal axis that extends between the first end and the second end. The balancing valve spool also includes a piston sleeve fixed to the valve rod between the first end and the second end. The balancing spool valve further includes a fixing member arranged between the valve rod and the piston sleeve. The fixing member extends in a direction parallel to the longitudinal axis of the valve rod. Connecting the fixing piece to an actuator of the valve and arranging the fixing piece between the valve rod and the piston sleeve along the axial direction of the valve rod, guides the valve rod and simultaneously isolates inlet pressure and outlet pressure.

Abstract: A horizontal gas leak trap is provided to remove entrained gases from an industrial liquid circulation system, such as a closed water circulation system of a heat exchanger for heating natural gas in an LNG power plant. The horizontal gas leak trap includes a tank having an inlet and an outlet configured to be connected in-line to a liquid circulation system, a gas-water separator disposed inside the tank between the inlet and the outlet, a gas reservoir at the top of the tank, and a vent valve coupled to the gas reservoir and configured to vent gases out of the reservoir. The inlet and the outlet are spaced apart horizontally from each other so that liquid flowing through the tank passes across and/or through the gas-water separator.

Abstract: A regulator is disclosed that controls fluid flow through a control valve via a linkage including a lever that is acted upon by a spring cylinder acting in a direction perpendicular to the direction of fluid flow through pipes connected to the control valve. The closure performance of the control valve of the regulator is optimized by the direction the spring cylinder acts and the mechanical advantage the lever provides. The regulator further includes a diaphragm and diaphragm cover, and the regulator is configured to allow the diaphragm cover to be stamped rather than cast.

Abstract: The present invention discloses a pressure regulating valve, which comprises an actuator and a valve body, wherein communicating passages are arranged between a chamber of the valve body and a chamber of the actuator, a pressure tapping pipe is further arranged in the chamber of the valve body, one end of the pressure tapping pipe is connected with the communicating passage and the other end of the pressure tapping pipe is suspended. By adopting the embodiment of the pressure tapping structure in the pressure regulating valve provided by the present invention, the performance of the pressure regulating valve in a flow accuracy range is improved.

Abstract: An actuator of a regulator is provided. The actuator is connected to one end of a valve rod (212/312). The actuator comprises a shell (203/303); a limiting component (205/305), the limiting component (205/305) being disposed on an inner wall of the shell (203/303); a diaphragm assembly (204/304), the diaphragm assembly (204/304) being accommodated in the shell (203/303), and the diaphragm assembly (204/304) being movably sleeved on the valve rod (212/312); and an elastic element (226/326), the elastic element (226/326) being accommodated in the shell (203/303), and the elastic element (226/326) being coupled to the diaphragm assembly (204/304), and being movably sleeved, between the diaphragm assembly (204/304) and a tip of one end of the valve rod (212/312), on the valve rod (212/312) in a compressed mode.

Abstract: The present invention relates to a balancing valve spool and a pressure regulating valve comprising the balancing valve spool. The balancing valve spool comprises a valve rod; a piston sleeve fixed on the valve rod; and a fixing piece sleeved between the valve rod and the piston sleeve and arranged along a direction in parallel with an axis of the valve rod. In one embodiment of the present invention, by connecting the fixing piece onto an actuator of the valve and arranging the fixing piece between the valve rod and the piston sleeve along the direction of the axis of the valve rod, an effect of guiding the valve rod is achieved and a sealing effect of isolating inlet pressure and outlet pressure is simultaneously achieved. Compared with the related arts, this design has the advantage of simple structure.

Abstract: The present invention relates to a valve assembly, the valve assembly comprising: a valve body having a first pressure chamber and a second pressure chamber, wherein the pressure of the first pressure chamber is lower than that of the second pressure chamber, and the pressure of the second pressure chamber is discharged to the first pressure chamber in response to the change of the pressure of the first pressure chamber; a blocking device arranged between the first pressure chamber and the second pressure chamber; and a valve stem arranged in the valve body with one end movably contacting the blocking device; and a diaphragm connected to the valve stem and adjacent to or arranged above the first pressure chamber; wherein when the pressure of the first pressure chamber is changed, the diaphragm forces the valve stem to move by sensing the pressure change of the first pressure chamber.