摘要:
A fluid regulating device includes a regulator valve, an actuator and a pilot regulator valve assembly. The pilot regulator valve assembly provides a pressure load to a surface of a diaphragm of the actuator in response to changes in downstream pressure being applied to the opposite surface of the diaphragm. An upper cavity of the pilot regulator valve assembly is in fluid communication with a control cavity of the actuator, allowing both the actuator diaphragm and the pilot regulator valve assembly diaphragm to simultaneously sense pressure variations within the cavities. As the downstream pressure varies, the diaphragms of both the actuator and the pilot regulator valve assembly displace to regulate the downstream pressure and the pilot regulator valve assembly maintains a load pressure. The regulator further includes a balanced regulator valve applying a balancing force to offset a force of upstream pressure on a balanced valve plug.
摘要:
A high flow pressure regulator valve is disclosed having an integral pilot valve. The disclosed valve includes a pressure regulating portion including inlet and outlet ports, a valve seat, valve disc and a spring for biasing the valve disc into engagement with the valve seat. The valve also includes a pilot valve portion positioned on the flow regulating portion. The pilot valve portion includes a pilot spring, a diaphragm and a pusher post. One end of the pusher post is positioned toward the diaphragm and a second end is disposed within an annulus region. The valve further includes a pressure path that enables selective fluid communication between the outlet port, the annulus, an inner chamber region disposed beneath the diaphragm, and an intermediate chamber disposed above the valve disc. Other embodiments are disclosed and claimed
摘要:
A system for hydraulically managing fluid pressure between selected set points includes a pilot control system operably coupled to a main valve. The pilot control system includes at least one fluid conduit, a variable orifice assembly, and a control pilot valve apparatus. Fluid is passed through a fixed orifice and into a first chamber of the control pilot valve apparatus. Fluid is passed through the variable orifice of the variable orifice assembly and into a second chamber of the control pilot valve apparatus. The main valve is hydraulically opened or closed in response to a pressure differential between the first and second chambers of the control pilot valve apparatus so as to manage fluid pressure downstream of the main valve between the selected upper and lower set points.
摘要:
A pilot valve (2) for controlling operation of a hydraulically-actuated pressure reducing valve, the pilot valve including a housing (4), and a first valve member (15) mounted in the housing for longitudinal movement along an axis relative to the housing and to a second valve member (22) in response to the outlet pressure of the pressure reducing valve. The first valve member is provided with an aperture (20) and the second valve member comprises a closure portion which varies the effective flow cross section of the aperture in accordance with relative longitudinal movement between the first and second valve members. An adjuster (26) controls the relative rotational position of the first and second valve members, the closure portion having a profile such that relative rotation between the first and second valve members causes the closure portion to vary the effective flow cross section of the aperture (20).
摘要:
A device for controlling the delivery of a combustible gas to a burner apparatus comprises a main gas-delivery duct (2) in which there is at least one servo-assisted diaphragm valve (5) including a valve seat (5a) associated with a corresponding closure member (5b) with diaphragm control (6) for opening the seat against the action of a resilient biasing means (7), the diaphragm valve (5) comprising a respective control solenoid valve (8) with an electromagnetic operator for controlling the opening/closure of the corresponding valve (5), the solenoid valve being arranged to bring about the opening/closure of a duct (9) of a respective servo-assisted control circuit so as to operate the closure member (5b) of the valve (5) indirectly, by means of the diaphragm control, the duct of the control circuit putting a portion of the main duct (2) that is disposed upstream of the valve seat (5a) with respect to the direction of the gas-flow into flow communication with a respective control chamber (10) of the diaphragm valve, a first side (6a) of the diaphragm (6) of the diaphragm control being subjected to the pressure existing in the respective control chamber (10). The second, opposite side (6b) of the diaphragm (6) delimits a space (21) which is separated from the portion of the main duct (2)_that-" extends downstream of the valve seat so that the second side (6b) of the diaphragm is not subjected to the delivery pressure of the gas that is present in the said duct portion, downstream of the valve seat (5a).
摘要:
A fluid control valve having a valve body (12, 116), a cage (20, 84, 124), and a flexible elastomeric diaphragm (38, 88, 144) with a formed convolution to fully open the cage opening. An elastomeric diaphragm regulator with a flow diverter in the fluid flow path to reduce fluid flow separation and thereby reduce the required flow recovery area before pressure throttling. A raised knife edge seat (134) located on the cage top (130) in a position of stagnant fluid flow to reduce the build-up of contaminants on the seat. An elastomeric diaphragm regulator with a valve actuator coupled to a guided valve stem (188, 198) attached to the regulator diaphragm.
摘要:
A fuel control valve construction comprising a housing (21, 21A) having an inlet (22, 22A) and an outlet (24, 24A) interconnected together by a main valve seat (25, 25A), a movable main valve member (26, 26A) carried by the housing (21, 21A) for opening and closing the main valve seat (25, 25A), a flexible diaphragm (27, 27A) carried by the housing (21, 21A) and defining two chambers (32, 33; 32A, 33A) therewith that are disposed on opposite sides of the diaphragm (27, 27A), the main valve member (26, 26A) being interconnected to the diaphragm to be movable thereby, a main spring (38, 38A) operatively associated with the main valve member (26, 26A) to tend to move the main valve member in a direction to close the main valve seat (25, 25A), whereby pressure in the inlet (22, 22A) and, in one chamber (33, 32A; 32, 33A) will generate an additional seating force on the main valve member (26, 26A) to ensure a tight closure of the main valve seat (25, 25A).
摘要:
Some embodiments include a flow regulator with a main body dimensioned to be received within a flow passageway that includes an inlet and an adjustable outlet. Further, some embodiments include an inner chamber positioned in the main body extending from at least proximate the inlet of the main body along at least a partial length of the main body and positioned as an upstream section. Some embodiments include a compressible or expandable extending vane extending from the main body and extending around the inner chamber. Some further embodiments include an adjustable fluid flow space extending around or over at least a portion of the extended vane that is configured to receive at least some fluid from at least a portion of the flow passageway, where the fluid comprises a fluid flow rate and a fluid pressure.
摘要:
A balanced valve trim, a regulator valve with a balanced valve trim, and methods for modifying a regulator valve with a balanced valve trim assembly to accommodate different volume flow rates through the regulator valve are disclosed.