A remote regulator adjustment tool that can be used to adjust an output pressure of a remote regulator. The remote regulator adjustment tool comprises a housing defining a first bore extending therethrough, an adjustor piston movably disposed within the first bore, and an adjustment knob attached to the adjustor piston.

A pressure regulator for a fuel cell system may include: a housing having an inlet port into which gas is introduced, an outlet port through which gas is discharged, and an regulated pressure chamber connected to an outside through the outlet port; a piston moving up and down in the housing, having a main flow path penetrating through an inside of the housing and a pressure acting portion applying a pressure of gas in the regulated pressure chamber of the housing, and selectively communicating between the inlet port and the regulated pressure chamber of the housing through the main flow path as the piston moves up and down; and a spring provided in the housing to elastically support the pressure acting portion of the piston on an opposite side of the regulated pressure chamber.

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.

A regulator may include a main body portion, a pressure regulating chamber, a valve seat, and a piston pressure regulating valve. The piston pressure regulating valve may include a pressure regulating valve element having an end surface that is adjustable into close contact with at least a portion of the valve seat. The piston pressure regulating valve may also include a piston portion surrounding an outer periphery of the pressure regulating valve element. The piston portion may be slidable in an axial direction of a passage of the main body portion and may be biased via a pressure regulating spring disposed in an atmosphere chamber. The pressure regulating valve element may include a step protruding from a fitting portion to the piston portion at an upstream position disposed displaced from a pressure regulating range at an outer peripheral portion of the pressure regulating valve element.

A step protruding from a fitting portion to a piston portion is provided at an upstream position displaced from a pressure regulating range at an outer peripheral portion of a pressure regulating valve element.

A pressure regulator including a closure resisting mechanism that increases the total closure resisting force of a closure element to prevent the closure element from moving into a closed position until a predetermined pressure set point is reached. The closure resisting mechanism operates automatically and is spring actuated in response to pressure within a fluid pathway of the regulator. The closure resisting mechanism is disposed external to the fluid pathway so as not to impede fluid flow.

A pressure reducing valve with a valve housing, with a valve carrier in the housing interior having a throughflow channel, and with a cup-shaped valve body displaceably guided from an open position into a closed position counter to a restoring force, where the valve body abuts a valve seat on the valve carrier formed as a sealing ring, closing a channel opening. The sealing ring is held in an annular groove of the valve carrier and is axially supported by the groove flanks. The groove flank which faces the valve body ends in front of the inner circumference thereof, which abuts the sealing ring when the pressure reducing valve is closed. A sealing-lip-like circumferential molded-on formation is molded on that end face of the sealing ring which faces the valve body, and this formation moves against the inner circumference of the valve body when the primary pressure on the inlet side of the valve rises.

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.

A pressure regulator valve for regulating pressures within a portion of an irrigation system, can also be used to shut off downstream flow into the portion of the irrigation system in response to an incoming command arriving via an incoming port into the regulator.

A gas regulator includes a valve chamber body that houses two valves of the regulator. Valve elements that move to open and close the two valves are received via a same opening into the valve chamber body, which is closed by a plug. The plug can define a first valve seat as well as a piercing element used to pierce a compressed gas cylinder. A retainer can hold a gasket at a valve seat as well as provide a bore or other support for a valve element and valve element spring.