A filter-included energy-saving large-capacity direct-acting precision pressure regulation valve includes a main body that is formed of a pressure regulation seat, a pressure regulation filter valve, and a protective cap arranged in sequence from top to bottom. The pressure regulation filter valve includes a main channel through which a primary side pressure and a secondary side pressure may flow. The main channel includes a primary valve port and a secondary valve port arranged therein for controlling and regulating the secondary side pressure and flow in a stage-wise manner. A flowrate straight rod assembly includes a straight rod fit to a pressure plunger ring. A straight rod spherical seat and a straight rod holder are coupled to an upper section of the straight rod and a secondary valve port spring supports a lower section of the straight rod. The pressure plunger ring is supported on a primary valve port the spring.

A pressure regulating valve including a seal seat that defines an opening. A seat stem is moveable between a closed position in which the seat stem engages the seal seat and prevents fluid flow through the opening, and an open position in which the seat stem is spaced from the seal seat and permits fluid flow through the opening. A biasing element biases the seat stem in the closed position. A housing defines a passage that extends between an inlet and an outlet. The seal seat, seat stem and biasing element are positioned in the passage such that movement of the seat stem between the closed and open positions controls flow of the fluid between the inlet and outlet. The housing has an outer wall including a coupling mechanism for fixing the housing inside a channel of a primary regulator body.

A first valve mechanism is a valve mechanism provided in a flow path coupled to a liquid ejecting head that ejects a liquid, and including a valve that opens/closes the flow path, a first communication liquid chamber that communicates with the flow path, and a first pressure receiving body that converts a pressure difference between a pressure of the first communication liquid chamber and a reference pressure into an operating force of the valve, in which a threshold pressure of the first communication liquid chamber for determining opening/closing of the valve is variable.

Actuating device for process valves (2) comprising a housing (22), comprising two housing parts (24, 26) and an actuating membrane member (20) sealingly mounted between housing parts (24, 26) and moveable in strokes which, on the one hand, forms together with the housing a pressurizeable working chamber (28) and, on the other hand, is loaded by at least one return spring (32) such that, in the unpressurized state, the actuating membrane member (20) is brought into a predefined position by means of the pre-tension of the return spring (32), wherein the actuating membrane member (20) is adapted to be connected to a valve shaft (18) connected to the valve body (16) of the process valve (2). A coupling installation (64) is provided having coupling parts (66, 68) arranged on both sides in the direction of the lifting movement of the actuating membrane member (20), which coupling parts are adapted to a connection (70) an the valve shaft (18) such that the connection of the valve shaft (18) with the actuating membrane member (20) is carried out by a one-sided mounting, wherein the valve shaft (18) is adapted to be connected to each of the coupling parts (66, 68) of the coupling installation (64). On the actuating device (2) a distance measuring system (48) is arranged, which comprises a connection (72) which is adapted to be connected to each of the coupling parts (66, 68) of the coupling installation (64) by means of a one-sided mounting, wherein the coupling parts (66, 68) are constructed in analogy to the corresponding connections (70, 72) for selectively fastening of the valve shaft (18) or the distance measuring system (48) to the coupling installation (64).

A pressure regulating valve including a seal seat that defines an opening. A seat stem is moveable between a closed position in which the seat stem engages the seal seat and prevents fluid flow through the opening, and an open position in which the seat stem is spaced from the seal seat and permits fluid flow through the opening. A biasing element biases the seat stem in the closed position. A housing defines a passage that extends between an inlet and an outlet. The seal seat, seat stem and biasing element are positioned in the passage such that movement of the seat stem between the closed and open positions controls flow of the fluid between the inlet and outlet. The housing has an outer wall including a coupling mechanism for fixing the housing inside a channel of a primary regulator body.

An air pressure control device includes first and second housings, a diaphragm partitioning an inner space of the housings into a first air chamber (one air chamber) and a second air chamber (the other air chamber), a valve seat supported by the diaphragm, a valve member arranged in the first air chamber and closing or opening a through-hole in the valve seat, a pressure adjusting mechanism (including a pressure adjusting bolt and an upper seat) that adjusts a force applied to the diaphragm from a side including the second air chamber, and a main spring (compression coil spring) disposed in the second air chamber and applying a spring force to a lower seat (spring receiving member) disposed on the valve seat. A bearing is interposed between the valve seat and the lower seat.

An integrated tire inflation valve comprises an inlet configured to receive air from an air tank, a pressure protection assembly configured to control air flow into the tire inflation system when an air pressure reaches a pre-set pressure level, a valve assembly in fluid communication with the pressure protection assembly, a pressure regulator configured to be adjusted to a desired pressure to thereby allow air through the pressure regulator at a desired level, a flow switch configured to selectively allow air therethrough, and an outlet configured to provide air from the flow switch to one or more tires of a vehicle. The inlet, pressure protection assembly, valve assembly, pressure regulator, flow switch, and outlet are all positioned within a single housing.

What is disclosed is a pressure regulator having a mechanism to turn fluid flow through the pressure regulator on or off. The pressure regulator incorporates an actuator by which fluid flow to a pressure chamber that controls the linear movement of a flow tube is selectively actuated from one of a downstream supply and a pressurized fluid supply, such as an upstream supply. The actuator can be a manual, electromechanical, hydraulic or other form of actuator.

What is disclosed is a pressure regulator having a mechanism to turn fluid flow through the pressure regulator on or off. The pressure regulator incorporates an actuator by which fluid flow to a pressure chamber that controls the linear movement of a flow tube is selectively actuated from one of a downstream supply and a pressurized fluid supply, such as an upstream supply. The actuator can be a manual, electromechanical, hydraulic or other form of actuator.

A pressure regulating valve includes a casing, a holder, a fixed valve, a movable valve, a spring member, a diaphragm, and a filter. The filter is configured to filter fluid flowing from a flow inlet of the casing into a pressure chamber. The filter includes a filtering part for filtering fluid and a holding part including a frame part for holding an outer periphery of the filtering part. An alignment structure configured to align the holding part at a predetermined position is provided between the holding part of the filter and the holder, or between the holding part of the filter and the casing.