Abstract: The present disclosure pertains to a system configured to protect flows in piping systems using minimal spare components. Some embodiments may provide: a first piping subsystem configured to receive a portion of the input flow; a second piping subsystem configured to receive the portion of the input flow by substituting for the first subsystem; a test subsystem configured to detect whether each of the first and second subsystems is able to vent when at least one, in the each subsystem, of a respective pressure and a respective pressure rate satisfies first and second criteria, respectively; and first and second pilots configured to detect a maximum pressure and a maximum pressure rate, respectively, of the portion of the first and second subsystems.

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 valve assembly for an anti-ice system of an aircraft. The valve assembly comprises: a valve body; a first piston; and a regulating piston. The valve body defines a valve inlet, a valve outlet, a fluid passage between the valve inlet and the valve outlet, and a core portion defining a first chamber by cooperation with the first piston and a regulating chamber by cooperation with the regulating piston. The first piston is moveable between a first position and a second position, and the regulating piston is movable between a first position and a second position. The first piston overlaps the regulating piston when the first piston is its first position and the regulating piston is in its second position.

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 valve includes a valve axis extending in an axial direction, a valve housing, a ring that surrounds the valve axis, a seal, a spring for exerting a spring force, and a piston arranged in the valve housing. The valve housing includes a first valve housing opening through which a flow medium can pass. The ring is secured to the first valve housing opening. The seal is held on the valve housing by the ring. The piston is coaxial to the valve housing on the valve axis and axially faces the first valve housing opening. The piston is axially movable in the valve housing against the spring force, and the first valve housing opening can be closed by the piston.

Abstract: A sleeve valve includes an inlet port and an outlet port. A sleeve is movable to close flow from the inlet port to the outlet port. The sleeve valve has a sleeve biased to an open position at which it allows flow from the inlet port to the outlet port by a spring. Pressure in a pressure chamber urges the sleeve to a closed position at which it blocks flow from the inlet port to the outlet port. A line pressure conduit communicates the fluid chamber into the pressure chamber. Pressurized air is supplied to the pressure chamber through a selectively closed valve. The selectively closed valve is opened to allow the flow of high pressure air from a pressure source into the pressure chamber to move the sleeve to a closed position. A bleed air system for a gas turbine engine is also disclosed.

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: The present invention relates to an axial valve with a modular concept for the regulation of fluid flow and prevention of fluid reverse flow consisting of a single-piece and two-piece outer valve body (1; 99) that can be installed within the pipeline, the outer valve body (1; 99) of which contains a coaxially situated inlet and outlet fluid flow opening; a central valve body (2) which is connected to the outer valve body (1; 99) by means of a plurality of ribs (1.1), wherein a channels (7) are situated between the outer valve body (1; 99) and the central valve body (2), and said channels allow for an undisturbed flow of the flow fluid when said axial valve is open; an actuator (4a; 4-b; 4c; 4-SC; 4-SH; 4-SFMO) located axially within the central valve body (2; 100), the actuator of which contains an actuator piston (5-a; 5-b; 5-c; 90; 112; 106-SH) and an actuator piston rod (5.1-a; 5.1-b; 5.1-c; 86.1-a; 106.

Abstract: This invention relates to an universal thermal actuation imbedded in Hybrid High Integrity Pressure Protection System (H-HIPPS) for critical services in pipelines, refiners, power plants and subsea, the hybrid system includes a quick isolation subsystem between an overpressure zone and a normal pressure zone and a quick releasing subsystem between the overpressure zone and a lower pressure zone with quadruple redundancies, more particularly, the universal thermal actuation subsystem based on thermodynamics has a thermal system (pressure sources, volume vessel like air return reservoir and heat source) and a control chamber and shutter valves, the isolation subsystem system controlled by the actuation system has one normal open valve, the releasing subsystem system controlled by the actuation system has one normal closed valve, the actuation systems can be used for both linear and rotary actuation applications anywhere either remote locations or subsea.

Abstract: A compressed air conduit can have a cross-sectional area, and a valve, the valve having at least one arm being deployable laterally into the cross-sectional area of the conduit to restrict flow within the conduit.

Abstract: A valve apparatus includes a base member having a hollow support element extending from the base member. A housing is attached to the hollow support element, and the housing includes at least one aperture. A moveable element is located within the housing and is slideably attached to the hollow support element. The hollow support element allows the moveable element to selectively travel toward and away from the base member.

Abstract: The present disclosure pertains to a system configured to protect flows in piping systems using minimal spare components. Some embodiments may provide: a first piping subsystem configured to receive a portion of the input flow; a second piping subsystem configured to receive the portion of the input flow by substituting for the first subsystem; a test subsystem configured to detect whether each of the first and second subsystems is able to vent when at least one, in the each subsystem, of a respective pressure and a respective pressure rate satisfies first and second criteria, respectively; and first and second pilots configured to detect a maximum pressure and a maximum pressure rate, respectively, of the portion of the first and second subsystems.

Abstract: A valve system includes a bellows-type pressure relief valve and an attachment assembly. The bellows-type pressure relief valve includes a main housing defining a main chamber, an inlet opening, and an outlet opening, a bonnet housing defining a bonnet chamber and a bonnet vent in the bonnet housing, and a bellows structure defining a bellows chamber fluidly connected to the bonnet chamber. The attachment assembly is coupled to the bonnet vent to selectively plug the bonnet vent. The attachment assembly include a coupling to couple to the bonnet vent, a pressure sensor to detect a pressure in the bonnet chamber, and a vent structure including a vent valve to selectively open in response to an applied force or in response to the pressure sensor detecting a pressure in the bonnet chamber reaching a pressure threshold.

Abstract: An anti-ice system includes a duct that extends from a hot air bleed source to an anti-ice manifold and a direct-acting valve coupled to the duct. The duct may be configured to route hot air from the hot air bleed source to the anti-ice manifold at a regulated pressure and the direct-acting valve may include an inlet portion, a reference chamber, a force-type torque motor, an outlet portion, and a modulating sleeve. The inlet portion may be configured to be in hot air receiving communication with hot air from the hot air bleed source, the reference chamber may be configured to be in hot air receiving communication with the inlet portion, the force-type torque motor may be configured to control a reference pressure of hot air in the reference chamber, and the outlet portion may be configured in hot air receiving communication with the inlet portion via the modulating sleeve.

Abstract: 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.

Abstract: Aspects herein include a valve to provide regulated fluid flow. The valve comprises a valve housing having an inlet and an outlet. The valve further comprises a valve seat disposed between the inlet and the outlet of the valve. The valve seat has a seat opening defined by a seat opening dimension and is fixed in relation to the valve housing. The valve further comprises a poppet disposed between the valve seat and the outlet of the valve, the poppet having a seat face opposing the valve seat. The seat face tapers from a poppet large dimension larger than the seat-opening dimension disposed toward the inlet end to a poppet small dimension smaller than the seat-opening dimension disposed toward the outlet end. The valve further comprises a plunger operatively coupled with the poppet as well as a solenoid within the valve chamber operatively coupled with the plunger.

Abstract: A hydrant valve with an internal automatic shut-off valve. The internal valve blocks communication between a piston chamber and a hydrant chamber when in a closed position. An upper valve opens the internal valve against its biasing force permitting the flow of fluid between the hydrant chamber and the piston chamber. The internal valve closes in response to a disconnection of the upper valve.

Abstract: A fluid coupling includes an inlet housing member, an outlet housing member rotatably connected with the inlet housing member to define a chamber, a regulator assembly disposed in the chamber and connected to the outlet housing member, a main poppet configured to control fluid flow between the inlet housing member and the outlet housing member, and/or a pilot poppet configured to selectively permit fluid flow through the main poppet. The outlet housing member may be configured to mate with and at least partially receive a nozzle. The regulator assembly may include a regulator housing and a regulator.

Abstract: A piston fuel pump for an internal combustion engine includes a pump housing, a piston, and a non-return discharge valve. The non-return discharge valve has a valve element and a guide element configured to guide the movement of the valve element. The guide element is at least indirectly pressed in a radial manner into an opening in the pump housing.

Abstract: A device for controlling the flow of a fluid through a conduit from an upstream side of the device to a downstream side of the device. The device includes a valve aperture (30), a cylindrical mounting member (24) on the downstream side of the valve aperture, a valve member (26) on the outside of the cylindrical mounting member that moves reciprocally to open and close the valve aperture, a control volume (44) defined between the cylindrical mounting member and the valve member, an arrangement (8) for introducing a control pressure into the control volume, and a seal (34) between the outer surface of the cylindrical mounting member and the inner surface of the valve member that substantially seals the control volume. The valve member is acted on by the pressure of the upstream side (PI) and the control pressure (P4) so as to be moved by the difference between these pressures.

Abstract: A high-pressure fuel supply pump including an electromagnetically driven intake valve is configured such that a pressure equalizing hole is provided in the valve stopper positioned between the valve and a pressurizing chamber. The pressure equalization hole connects a spring storage space, provided between a valve and a valve stopper, with a surrounding fluid passage. The high-pressure fuel supply pump is further configured such that an opening of the pressure equalizing hole at the spring storage chamber side is open at a position at the inner side of a diameter of the spring. Since the pressure in the pressurizing chamber can be introduced into the inner side of the spring without traversing the spring, the unstable behavior of the spring or the valve due to the introduced pressure eliminated. Since the force applied to the valve when the valve closes is stabilized, the closing timing of the valve is stable.

Abstract: A starter air valve comprising: a housing comprising an inlet at a first end, an outlet at a second end opposite the first end, and a center portion between first end and second end, the outlet being fluidly connected to the inlet through a fluid passage; a first piston located within the housing between the first end and center portion, the first piston comprising: a first cupped portion configured to form a first chamber with the housing proximate the first end; and a second piston located within the housing between the second end and center portion, the second piston comprising: a third cupped portion configured to form a third chamber with the housing proximate the second end; wherein the pistons are configured to regulate airflow through the fluid passage by adjusting at least one of a first pressure within the first chamber and a third pressure within the third chamber.

Abstract: A valve assembly includes a piston housing inside a flow duct between an inlet and an outlet so as to form an annular flow passage between the flow duct and the piston housing. The piston housing is axially aligned with a center axis of the flow duct. A piston is inside the piston housing and is configured to extend downstream of the piston housing in a closed position. A spring biases the piston to the open position. A fluid chamber is between the piston and an upstream end of the piston housing. A control opening extends through the upstream end of the piston housing and fluidically communicates with the flow duct and the fluid chamber. A control piston and a control spring are inside the piston housing. The control spring biases the control piston toward a first position that obstructs the control opening.

Abstract: A passive in-line valve configured to be actuated without an external control includes a valve housing defining an inlet, an outlet, and a flow path between the inlet and the outlet and a piston housing extending inwardly from the housing. The valve includes a valve piston movably disposed within the piston housing, the valve piston including an upstream side and a downstream side. The valve also includes a control mechanism disposed at least partially within the housing and configured to port outlet static pressure to the upstream cavity in a first state such that pressure is equalized on the valve piston.

Abstract: An inlet pressure valve regulation system to provide a regulated fluid flow includes a housing, first piston assembly, regulating valve, and inlet pressure conduit. The housing has an inlet at an inlet end which receives a pressurized fluid and an outlet at an outlet end which provides the regulated fluid flow. The piston assembly is arranged in the housing and has a first cavity and a control orifice to fluidly connect the inlet to the first cavity. The first piston assembly is configured to regulate the fluid flow. The regulating valve has a first valve chamber, a second valve chamber fluidly connected to a vent, a floating valve seat disposed between the first valve chamber and the second valve chamber, and a valve component. The floating valve seat includes a diaphragm and a seat having a passageway to fluidly connect the first valve chamber and the second valve chamber.

Abstract: The present invention relates to a pressure-reducing valve (1) having a valve housing (2), in the housing interior of which is provided a valve carrier (4) which has at least one through-flow channel (5), and having a pot-shaped valve body (3) which is guided displaceably from an open position into a closed position in opposition to a restoring force, in which closed position the valve body (3) abuts by way of the circumferential edge (6) of its pot shape in such a manner against a valve seat (7), which is provided on the valve carrier (4), that the valve body (3) closes at least one channel opening (8) of the at least one through-flow channel (5).

Abstract: A fluid flow control device serving as an inflow port from a fluid reservoir (R) to the interior of a production pipe (S) is in the form of a housing (3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l). The housing has a primary flow path (18) and a secondary flow path (19). The secondary flow path is in fluid communication with a chamber (B) in which is arranged an actuator (5) for a valve device (4), the valve device arranged to open and close the primary flow path. At least one flow restrictor (1,2) is arranged in the secondary flow path, the flow restrictor arranged to provide a pressure to chamber (B) sufficient to actuate the valve to an open position when the fluid flowing through the secondary flow path is oil, and a pressure sufficient to actuate the valve to a closed position when the fluid has a viscosity and/or density less than oil.

Abstract: This invention relates to a Hybrid High Integrity Pressure Protection System (H-HIPPS) for severe services, the hybrid system includes a quick isolation subsystem between an overpressure zone and a normal pressure zone and a quick releasing subsystem between the overpressure zone and a lower pressure zone with quadruple redundancies for 30 year service without repair more particularly, the hybrid system has a novel valve and a novel pilot, each with two independent plugs with metal to metal seal—(buckling seal) B ring assemblies and a novel (attachable)) A seal ring assembly to block or release over pressurize fluids without actuators for protecting the pipelines or the pressures vessels from surge pressure at the highest level of a system reliability with a fast block off time, redundant sensing valves, redundant releasing methods, redundant pressure protections, and cavitations and erosion suppressor.

Abstract: A hydrant valve with an internal automatic shut-off valve. The internal valve blocks communication between a piston chamber and a hydrant chamber when in a closed position. An upper valve opens the internal valve against its biasing force permitting the flow of fluid between the hydrant chamber and the piston chamber. The internal valve closes in response to a disconnection of the upper valve.

Abstract: A check valve assembly having a reduced net impact upon hemolysis, where the valve assembly has an elongated valve body including an inlet port, an outlet port, and an internal channel communicating between the ports, with each port disposed about and generally aligned with a central longitudinal axis of the body. The inlet port includes an umbrella-type check valve, and the internal channel is defined by three annular wall portions: a first annular wall portion aligned generally perpendicularly to the longitudinal axis to form a valve seat, a second annular wall portion that is generally concave, and a third annular wall portion that is generally convex, with the first, second and third annular wall portions forming an adjoining and essentially continuously curved, contiguous interior surface which smoothly redirects fluid flow toward the central longitudinal axis of the body and the outlet port.

Abstract: A shut-off valve for controllable fluid flow may include a closing member that substantially has the structure of a hollow, round pipe, and which closing member may be pushed axially along the axis of the closing member within the valve body in order to shut off the flow of medium. The closing member may be pressed on an end face against a seat in order to shut off the flow of medium. The closing member may be directly operated with an electromagnetic lift drive.

Abstract: A pressure relief device for a double isolation valve comprises a body with a valve cavity. The valve body has a pocket formed therein. A disc is disposed in the central section of the pocket. The disc is interposed between two spring-actuated seats. Each of the seats is in fluid communication with opposing valve sides. The pocket central section is in fluid communication with the valve body cavity. Each of the seats is provided with two different types of gaskets in series. In operation, reverse pressure causes retraction of the seats, thereby relieving valve body cavity overpressure.

Abstract: High Integrity Pressure Protecting Systems (HIPPS), wherein the HIPPS has an ON/OFF valve with a housing, wherein the housing has an inlet and an outlet, and a conduit for passage of a fluid from the inlet to the outlet, and with a closure element, wherein in an open position the closure element opens the conduit for allowing the passage, and in a closing position the closure element closes the conduit for inhibiting the passage, and a hydraulic actuator, having a control element that is fixated at the closure element, and a switchable hydraulic supply unit, which in an active state supplies a control face of the control element with a control pressure, and in a passive state releases the control pressure from the control face, a sensor measuring a pressure of the fluid downstream from the outlet, and a logic solver that compares the downstream pressure to a critical value.

Abstract: A pilot valve arrangement including a first and second pilot valve parts. The second pilot valve part including a second pilot valve body including a compartment, a low pressure fluid inlet for receiving fluid from the first pilot valve part, and a high pressure fluid inlet, and a fluid outlet for receiving fluid from the low pressure and high pressure inlets via said compartment and providing fluid to a piloted valve. In a first state, the second pilot valve of the pilot valve arrangement provides for a first fluid flow path within the compartment to enable the low pressure fluid inlet to be in fluid communication with the fluid outlet via the first fluid flow path. In a second state, a second fluid flow path within the compartment to enable the high pressure fluid inlet to be in fluid communication with the fluid outlet via the second fluid flow path.

Abstract: A device having pressure independent control and balancing valves, suitable for use in a hydronic system, comprises a seat, a plug having an upstream surface and a downstream surface, and a piston, wherein the seat, plug and piston are aligned coaxially, a controller determines the size of a first flow restriction between the upstream surface of the plug and the seat, the piston is operable to move in response to differential pressure across the first restriction and a predetermined force, the position of the piston relative to the downstream surface of the plug determining the size of a second flow restriction thereby in use maintaining a substantially constant differential pressure across the first restriction.

Abstract: A system is disclosed wherein a pressure pulse dampener is in fluid communication with a compressed fluid. The pulse dampener being operable for reducing pressure pulsations within the fluid. In some embodiments a check valve can be in fluid communication with the pulse dampener to prevent reverse flow of the compressed fluid.

Abstract: A combined balancing and control valve suitable for use in a hydronic system is provided, including a chamber enclosing a plug (6, 10, 16, 15), a seat (13) and a cam and pinion mechanism (20-28) for adjusting the separation of the plug (6, 10, 16, 15) and the seat (13). Pressure ports (42, 43) are included for monitoring the rate of fluid flow across the separation. The cam and pinion mechanism provides a motion transformation (20-27) operable by an actuator (28) to control the motion of the valve plug (6, 10, 16, 15). The valve plug motion provides a favorable change in conductance of the valve for a given change in the actuator position. The actuator (28) is calibrated in increments which correspond to incremental changes in the conductance.

Abstract: The present invention refers to a dual pressure regulation system to ensure a proper pressure regulation during the Aerial REFUELING operations with Hose and Drogue systems. More specifically is directed to dual redundant fuel pressure regulation systems. The pressure regulator system comprises two pressure regulators (10, 20) located in series and a control element (30) for controlling the movement of both regulators operatively connected downstream (34) the second pressure regulator (20) such that the movement of the pressure regulators (10, 20) is independently controlled by the control element (30) according to the delivery pressure downstream the second regulator (20).

Abstract: A first valve member has an axis and a first seat surface with a tapered contour facing axially downstream. A second valve member has a second seat surface with a tapered contour facing axially upstream. The second valve member has a closed position in which the second seat surface abuts the first seat surface, and has an open position in which the second seat surface is spaced axially downstream from the first seat surface. The second valve member further has a terminal end portion configured as a nose cone. The nose cone may be located entirely downstream of the second seat surface, and may have a cavity with a drain opening.

Abstract: A gas charging check valve uses a first elastic element and a second elastic element, which respectively provide elastic force on a top valve and a bottom valve. The top valve and the bottom valve correspond to each other as a set. When the gas charging device is moved to apply an external force on a movement control portion of the gas charging check valve, the second elastic element removes the elastic force applied on the bottom valve to reduce the required gas inject force for a valve formed by the top valve and the bottom valve, so that the gas can more easily enter the valve.

Abstract: An internal combustion engine having an air intake section (2) which has an air intake line (3), having an exhaust section (4) which has an exhaust line (5), and having at least one exhaust-gas turbocharger (6) which has a compressor (7) in the air intake line (3) and a turbine (8) arranged in the exhaust line (5), characterized by a controllable bypass arrangement (9) which has an air supply line (10) which, as viewed in the flow direction (R) of the intake air, opens into the air intake line (3) down-stream of the compressor (7).

Abstract: The present invention applies to the hydraulic axial piston regulating valve with a linear position sensor, consisting of the valve body (1) and the central part (2), around which the fluid flows when the valve is opened, the hydraulic cylinder (3) with the piston (4) and the piston rod (5), to which the valve regulating piston (12) is firmly fastened. The linear position sensor (8) is placed inside the hydraulic cylinder, and in the electric version of the valve, the sensor with the magnetostrictive waveguide (20) is used. The present invention applies also to the utilization of the linear response of such valves for the regulation purpose using various driving aids; as e.g. electro-hydraulic drive, pneumatic drive or autonomous drive using the energy of the fluid flowing in the pipeline.

Abstract: A valve assembly is provided and includes a poppet disposed to regulate a pressure of a fluid flowing through a pathway defined between the poppet and a valve body, a drive element configured to modulate a pressure of a servo fluid to thereby control a position of the poppet relative to the valve body and an actuator body coupled to the poppet and configured to deliver a supply fluid to the drive element from a first cavity defined between the poppet and the actuator body and to deliver the servo fluid from the drive element to a second cavity defined between the actuator body and the poppet. The poppet defines a filter through which fluid flows from the pathway into the first cavity as the supply fluid.

Abstract: A metering valve includes a valve body, a flow tube, an orifice plate, a central flow body, and a mover. The valve body has an inlet and an outlet. The flow tube is carried for axial movement in slidable and sealing engagement with the valve body at an inlet end and an outlet end. The orifice plate has an outlet. The central flow body is provided on an upstream end of the orifice plate and has an annular seal configured to seat into engagement with the outlet end of the flow tube when the flow tube is moved to a downstream position. The central flow body also includes a central, protruding flow diverter upstream and central of the annular seal. The mover is provided in the valve body and is configured to carry the flow tube for displacement of the output end toward and away from the central flow body.

Abstract: In accordance with one embodiment of the present invention, a seal for a surge relief valve includes a) a valve housing having a flow inlet and a flow outlet; b) an annular retainer for coupling a plug to an interior of the valve housing, the retainer having a first end oriented toward the flow inlet and a second end remote therefrom; c) the plug having a first end oriented toward the flow inlet and a second end remote therefrom, the plug having a mating junction for coupling with the second end of the retainer, the plug having a first countersink, a second countersink, a first lip defined between the first and second countersinks and a second lip adjacent the second countersink; and d) an annular plug seal having a first end oriented toward the flow inlet and a second end remote from the first end for mating with the second countersink and a lip that abuts the second end of the retainer.

Abstract: A water-hammer proof and silent check valve comprises a shell (1), a spring (9), a flow guide body (10) and a cowl (11). The flow guide body (10) is provided with flow blocking boards (4, 6) which project from the outer surface of the flow guide body (10) and are capable of rotating around installation shafts (3, 7). A plurality of flow blocking boards are arranged in the flow passage in the axial direction of the valve, so that most part of pressure energy and kinetic energy are undertaken by the flow blocking boards by grading when liquid flows back to the valve, thus ensuring that the water hammer with large energy is divided into multiple water hammers with relatively smaller energy so as to greatly reduce the inner stress of valve bearing parts.

Abstract: A check valve (1) includes a casing (2) having a valve seat (10) formed in a flow path and a valving element assembly (21) disposed in the casing. A top (23) of a valving element (22) is received in a large-diameter portion (38) of a through-hole (37) in a support member (35) of the valving element assembly. A narrow flow path portion (68) is formed between an arcuate portion (46) of an outer periphery (45) of the support member and a second enlarged-diameter portion (11) of the casing. The narrow flow path portion (a first portion of an intermediate flow path) is communicated with a back-pressure chamber (50) defined in the support member at the rear of the top of the valving element through a communicating passage (67) including a gap (66) between the outer periphery of the valving element and the inner periphery of the large-diameter portion and grooves (27) on the rear surface of the top of the valving element.

Abstract: Minimum pressure valve having a housing (13) with an inlet (14) and an outlet (15) and in which has been provided a valve body (21) which is pushed against a seating (30) round the inlet (14) in a closed position, and whereby the valve body (21) is situated at a distance from the above-mentioned seating (30) in an open position, such that the inlet (14) is connected to the outlet (15), whereby the valve body (21) is provided in a sliding manner in a valve casing (17) confining, together with the valve body (21) an inner space (36) that is connected to the inlet (14) via a duct (35).

Abstract: A dry valve is provided for a sprinkler system, including a housing including a valve body having an inlet end and a valve cover having an outlet end. A prime chamber housing is disposed within the housing and defines a prime chamber. A prime piston is disposed within the prime chamber and is movable between a closed position seated against a valve seat and an open position received within the prime chamber. A check valve diaphragm assembly is disposed within the housing and disposed against the prime chamber housing in a closed position and spaced from the prime chamber housing in an open position.

Abstract: Axial flow control valves are described herein. An example axial flow control valve described herein includes a valve body defining a passageway between an inlet and an outlet that is substantially parallel to a fluid flow path at the inlet and the outlet of the valve body. The example control valve includes a cartridge assembly removably coupled to the valve body and disposed within the passageway of the valve body between the inlet and the outlet. The cartridge assembly is substantially axially aligned with the passageway and includes a motor to operate the axial flow control valve between a first position to prevent the flow of fluid between the inlet and the outlet and a second position to allow the flow of fluid between the inlet and the outlet.