A pressure regulator vent guard configured to be in fluid communication with a non-working fluid chamber of a pressure regulator diaphragm. The pressure regulator vent guard includes a housing defining a compartment and a vent diaphragm configured to separate the housing compartment into a first vent chamber and a second vent chamber, the first vent chamber adapted to be in fluid communication with the non-working fluid chamber, and the second vent chamber in fluid communication with the atmosphere. The vent diaphragm seals the non-working fluid chamber from fluid communication with the atmosphere.

An axial differential pressure control valve (DPCV) having an annular body, a tubular body, a coaxial closing member for closing an outlet aperture for exit of the fluid from the tubular body, sealing separation means arranged between first and second chambers containing the return fluid and the delivery fluid, respectively, said separation means being movable axially upon activation of a thrust due to a pressure differential P=P1P2 and to the spring, wherein the closing member is fixed, and further comprising pins axially arranged between the ring nut and the abutment flange of the spring, wherein the pins pass through the pipefitting so as to come into contact with the said abutment flange and are designed to be displaced axially upon operation of the ring nut independently of the fixed closing member, so as to vary the compression of the spring.

A pressure reducer assembly (100) includes a pressure reducer body (110) defining at least one pressure reducer chamber (120) along a central axis (X-X). The pressure reducer chamber (120) includes an inlet section (122) and an outlet section (124) fluidly coupled with the inlet section (122). The pressure reducer assembly (100) further includes a spring-operated hollow piston rod (121) having a center (X) along the central axis (X-X), a cylindrical inner peripheral surface comprising an inner diameter (A), and a cylindrical outer peripheral surface comprising an outer diameter (B). A diaphragm (128) made of elastic material is adapted to be operatively coupled with the piston rod (121). The diaphragm (128) includes a central hole (150) having a center (Y) along a central axis (W-W) and a diameter (C). The pressure reducer assembly (100) is characterized in that, in an unmounted state, the outer diameter (B) of the piston rod (121) is greater than the diameter (C) of the central hole (150) of the diaphragm (128), whereas in a mounted state, the outer diameter (B) of the piston rod (121) is the same as the diameter (C) of the central hole (150) of the diaphragm (128), and the diaphragm (128) is assembled over the piston rod (121) so that the central axis (X-X) of the piston rod (121) coincides with the central axis (W-W) of the diaphragm (128).

Pressure holding and regulating valve characterized by a cylindrical valve housing (1) with an upper side (2), in which a central inlet bore (3) is provided with a diameter d1, and with a lower side (4), in which an inner bore (5) is, whose diameter d2 is greater than that of the diameter of the inlet bore (3) and which forms an outlet of the pressure holding and regulating valve, a closure piston (8) with an upper part (9) whose diameter d3 smaller than the diameter d2 of the inner bore (5) and larger than the diameter d1 of the inlet bore (3) is a freely movable, circular sealing disc (7) made of an elastomer between the closure piston (8) and an inner sealing surface (6) between the inner bore (5) and the inlet bore (3) on an inner side of the valve housing (1) is formed, and by a compression spring (12) which is supported in the inner bore (5) and presses trough the closure piston (8) the sealing washer (7) against the inner sealing surface (6).

A valve seat assembly for use in a fluid control valve. The valve seat assembly includes a pad holder and a support ring. The pad holder includes a support body configured to support a seat pad and a plurality of alignment struts projecting radially outwardly from the support body. The support ring extends around the radially outer perimeter of the alignment struts. The pad holder slides into and out of an operative position in the support ring.

A pressure limiter (1) such as may be used, in particular, in sanitary water supply systems. So that the pressure limiter (1) may also be reliably used in water-carrying systems in which contamination of the water flow from particles, for example from sand grains, is likely, the pressure limiter (1) has guide faces (8), which have a cross-sectional taper (9) in at least one direction of a displacement movement of a sleeve (4) of the pressure limiter (1).

A pressure regulator including a housing including an inlet flow passage and an outlet flow passage; a plunger reciprocally mounted in the housing and including a plunger flow passage having an axis offset from an axis of the inlet flow passage, and a stationary valve seat fixed to the housing and positioned between the inlet flow passage and an inlet to the flow passage of the plunger, wherein the valve seat is configured to receive and abut the inlet to the flow passage of the plunger.

An axial flow regulator includes a lateral access port through a portion of the valve body that provides access to a valve seat assembly and/or other portions of the valve trim without having to remove or uncouple the outlet flange or the inlet flange from the adjacent pipe sections. The lateral access port may extend through an outlet flange portion of the valve body and is configured to allow a valve seat assembly to be laterally inserted into and removed from the outlet flange. A valve seat assembly which may be configured for installation in the axial flow regulator includes a pad holder and a support ring for the pad holder that is separable from the pad holder. The pad holder may have alignment struts projecting radially outwardly from a pad support body. The support ring may include strut receivers that slidably receive the alignment struts of the pad holder.

A flow control apparatus includes a pressure regulator fluidly coupled to an inlet region and an outlet region and configured to reduce a pressure from a first value in the inlet region to a second value in the outlet region, where the second value is lower than the first value; and a variable area orifice disposed between the outlet region and an outlet opening of the apparatus, wherein a flow rate of a gas is controlled by the variable area orifice and is discharged from the apparatus to a gas supply line. A free area of the variable area orifice that is disposed between a movable element and a surface of the variable area orifice is configured to change linearly in response to a translation of the movable element relative to the surface.

A flow control apparatus includes an adjustable pressure regulator fluidly coupled to an inlet region and an outlet region and configured to reduce a pressure from a first value in the inlet region to a second value in the outlet region, where the second value is lower than the first value; and a fixed area orifice disposed between the outlet region and an outlet opening of the apparatus, wherein a flow rate of a gas is controlled by the fixed area orifice and is discharged from the apparatus to a gas supply line. The second value is based on a setting of the adjustable pressure regulator.