A valve, controlling pressure differential by regulating fluid flow between a tank and a canister, includes: a valve opening; a first moving element carrying a first sealing device making a leaktight seal and movable relative to the valve opening between a closed and an opened position allowing a first flow between the tank and the canister, through a first passageway with a first size; a second moving element carrying a second sealing device making a leaktight seal and movable relative to the valve opening between a closed and an opened position allowing a second flow between the tank and the canister, through a second passageway with a second size. The second moving element includes a central hole having a frustoconical surface partly defining the first passageway. The first sealing device has a complementary frustoconical surface cooperating with the frustoconical surface of the central hole of the second moving element.

A valve, controlling pressure differential by regulating fluid flow between a tank and a canister, includes: a valve opening; a first moving element carrying a first sealing device making a leaktight seal and movable relative to the valve opening between a closed and an opened position allowing a first flow between the tank and the canister, through a first passageway with a first size; a second moving element carrying a second sealing device making a leaktight seal and movable relative to the valve opening between a closed and an opened position allowing a second flow between the tank and the canister, through a second passageway with a second size. The second moving element includes a central hole having a frustoconical surface partly defining the first passageway. The first sealing device has a complementary frustoconical surface cooperating with the frustoconical surface of the central hole of the second moving element.

A drive that is drivable by a pressure medium is described. The drive is used for a valve that can be used in hygienic applications. The drive includes a drive housing, in which a main piston is movable along a stroke direction by the action of the pressure medium and can be coupled to a rod, and a stop for limiting a movement of the main piston. To improve the drive, it is proposed that an additional piston is provided, which is movable by the action of the pressure medium. The stop can be carried along by the additional piston. The disclosure also describes a double-seat valve comprising such a drive and to a method for operating such a drive.

An improved deflator valve for reducing deflation time. The deflator valve has a main body with one or more ports, one or more vents, or port or vent slots for introducing air into or relieving pressure from within the main body in a vortex, circular flow. The deflator valve also includes a piston having an O-ring disposed around an outer circumference of the piston. The O-ring of the piston and the ports and vents are effective for reducing noise and deflation time and improving accuracy and ease of adjusting a pressure setting. The deflator valve can further include a dual or variable rate spring that can achieve an extensive destination pressure range. The deflator valve can also include a threadless lead in, fewer valve stem threads, or a lock chuck for enhanced valve stem attachment methods.

An improved deflator valve for reducing deflation time. The deflator valve has a main body with one or more ports, one or more vents, or port or vent slots for introducing air into or relieving pressure from within the main body in a vortex, circular flow. The deflator valve also includes a piston having an O-ring disposed around an outer circumference of the piston. The O-ring of the piston and the ports and vents are effective for reducing noise and deflation time and improving accuracy and ease of adjusting a pressure setting. The deflator valve can further include a dual or variable rate spring that can achieve an extensive destination pressure range. The deflator valve can also include a threadless lead in, fewer valve stem threads, or a lock chuck for enhanced valve stem attachment methods.

An actuator system for an injection molding system includes a double acting pressurized fluid actuator having a piston drive movable in a cylinder space, a flow control valve for regulating a flow rate of pressurized fluid to and/or from the cylinder space, a flow sensor for detecting the flow rate of pressurized fluid to and/or from the cylinder space, and an electronic controller for controlling the flow control valve to regulate the flow rate of pressurized fluid to and/or from the cylinder space depending on the flow rate detected by the flow sensor.

An actuator system for an injection molding system includes a double acting pressurized fluid actuator having a piston drive movable in a cylinder space, a flow control valve for regulating a flow rate of pressurized fluid to and/or from the cylinder space, a flow sensor for detecting the flow rate of pressurized fluid to and/or from the cylinder space, and an electronic controller for controlling the flow control valve to regulate the flow rate of pressurized fluid to and/or from the cylinder space depending on the flow rate detected by the flow sensor.

Aspects of the present disclosure relate to actuator assemblies and related methods for valve systems. In one implementation, an actuator assembly for valves includes an outer housing. The outer housing includes a first internal volume and an inner shoulder portion. The actuator assembly includes an inner housing disposed at least partially in the outer housing. The inner housing includes a second internal volume. The actuator assembly includes one or more first pistons disposed in the first internal volume of the outer housing, and one or more second pistons disposed in the second internal volume of the inner housing. The one or more first pistons are disposed between the one or more second pistons and the inner shoulder portion of the outer housing. The actuator assembly includes an actuator stem disposed through at least a portion of the outer housing and coupled to the one or more second pistons.

A regulating valve device for a fluid cylinder includes a shut off valve having a ball tappet that actuates the shut off valve. A lever has a cam surface that interacts with the ball tappet as the lever is rotated to translate the ball tappet linearly and actuate the shut off valve. The lever is rotatable from a first valve closed position through a valve open position to a second valve closed position such that the valve open position is intermediate of the first and second valve closed positions. A pressure or flow regulating valve is downstream of the shut off valve. A handwheel is operatively connected to the pressure or flow regulating valve to adjust an outlet pressure of the pressure or flow regulating valve. The handwheel has an axis of operation that is offset from a longitudinal axis of the fluid cylinder by an acute angle.

A damping adjuster is disclosed herein. The damping adjuster includes an adjuster housing and an adjuster shaft. The adjuster shaft rotatable within the adjuster housing, the adjuster shaft comprising a variable flow area feature, the variable flow area feature formed annularly about a portion of the adjuster shaft, the variable flow area feature comprising a plurality of different flow area values therealong. The damping adjuster also includes a fluid flow path through the adjuster housing, wherein the fluid flow path includes the variable flow area feature of the adjuster shaft.