Abstract: A pressure regulating and pressure relief valve, has a valve body defining an inlet port, outlet port, valve seat and pressure relief opening. A pressure regulating plug is displaced during a first portion of a motion from an open position, which provides a continuous flow path from the inlet port to the outlet port, to a closed position in which the plug is closed against the valve seat to obstruct the continuous flow path. A spring biases the plug to the open position. An actuation surface is exposed to a pressure at the outlet port that displaces the plug against the spring bias toward the closed position. Further displacement of the plug beyond the closed position during a second portion of the motion that is beyond a range of the first portion of the motion, opens a relief flow path from the outlet port through the pressure release opening.

Abstract: A pressure regulating and pressure relief valve, has a valve body defining an inlet port, outlet port, valve seat and pressure relief opening. A pressure regulating plug is displaced during a first portion of a motion from an open position, which provides a continuous flow path from the inlet port to the outlet port, to a closed position in which the plug is closed against the valve seat to obstruct the continuous flow path. A spring biases the plug to the open position. An actuation surface is exposed to a pressure at the outlet port that displaces the plug against the spring bias toward the closed position. Further displacement of the plug beyond the closed position during a second portion of the motion that is beyond a range of the first portion of the motion, opens a relief flow path from the outlet port through the pressure release opening.

Abstract: A pressure reducing valve (IOO) includes a displaceable throttling element (51) displaceable between a fully-open position in which fluid flows along a flow path from an inlet (11) to an outlet (45), and a closed position in which the flow path is blocked. A spring (6) acts to displace the displaceable throttling element to the fully-open position while pressure within a control chamber (54) acts on a pressure-actuated surface to displace the displaceable throttling element towards the closed position. A switchable hydraulic control circuit in fluid connection with the inlet, the outlet and the control chamber, is switchable between first state in which a pressure within the control chamber is equalized with the outlet pressure, and a second state in which the pressure within the control chamber is equalized with an inlet pressure.

Abstract: A pressure regulating and pressure relief valve, has a valve body defining an inlet port, outlet port, valve seat and pressure relief opening. A pressure regulating plug is displaced during a first portion of a motion from an open position, which provides a continuous flow path from the inlet port to the outlet port, to a closed position in which the plug is closed against the valve seat to obstruct the continuous flow path. A spring biases the plug to the open position. An actuation surface is exposed to a pressure at the outlet port that displaces the plug against the spring bias toward the closed position. Further displacement of the plug beyond the closed position during a second portion of the motion that is beyond a range of the first portion of the motion, opens a relief flow path from the outlet port through the pressure release opening.

Abstract: A pilot valve assembly (10) includes a cylindrical connector (12) having a first end portion (16) with external threading (18) for engaging a threaded control socket (106) of a hydraulic valve (100), and a second end (20) with an array of teeth (22) arrayed around its edge. A circumferential slot (24) around connector (12) is spaced from second end (20). The assembly also includes a pilot valve (26) with a mechanism for controlling a pressure within the hydraulic control valve actuator chamber. Pilot valve (26) is formed with a recess (28) having a complementary teeth (30) for engaging teeth (22) of connector (12) in a range of angular orientations. A clamping arrangement engages slot (24) and clamps pilot valve (26) to second end (20) of connector (12), thereby fixing an angular orientation of the pilot valve.

Abstract: A valve (10) for sealing and selectively opening a flow path from a water-filled inlet (210) to a dry outlet (220) includes a valve body (100) having a valve opening (230) surrounded by first and second annular valve seat regions (110, 120). A drainage channel (510, 512)) connects to a space between the first and second annular valve seat regions (110, 120). A plug (300) is displaceable between an open state and a closed state for closing the valve opening (230). The plug has a first annular seal (310) for sealing against first annular valve seat region (110) and a second annular seal (350) for sealing against the second annular valve seat region (120). The second annular seal (350) is a flexible seal deployed so that it closes prior to closure of the first annular seal (310). Second annular seal (350) is elastically deformed so as to be pressed into contact with the second annular valve seat (120) when the plug (300) reaches its closed state.

Abstract: A hydraulic control valve actuated by a diaphragm's integral spring whose thicker part acts with greater force to close the diaphragm and plug unit of the valve and whose thinner part may complete the closing motion so that the integral spring may weaken faster than linearly in relation to displacement of the diaphragm and plug unit. A snap seat supporting the plug may include a seat portion and a grip skirt portion integrally joined at an acute angle. A bracket and sliding guide may guide a helical rotor touching an indicator. Movement of the diaphragm and plug unit may rotate the helical rotor and the indicator without the indicator rising out of the valve. The cover may have an internal control passage in communication with a base of the valve to allow the cover to be installed horizontally and vertically conveniently and without disconnecting the control tubing above the valve.

Abstract: An air release vent valve used to vent air from a liquid filled pipeline, the air release vent valve having a float valve deployed in a float valve housing extending from the pipeline and a surge suppressing shutter valve deployed in a vent passageway extending from said float valve housing such that said surge suppressing shutter valve is downstream from said float valve. The surge suppressing shutter valve includes an elastic shutter element that is pre-shaped to a normally open position and is configured to gradually deform to a closed position as a velocity of air flowing through said vent passageway increase so as to dampen the force of the closure of air release vent valve and prevent a pressure surge within the pipeline. Once a liquid level in the pipeline reaches the float valve, a float is raised so as to fully closes the vent passageway.

Abstract: A hydraulic control valve actuated by a diaphragm's integral spring whose thicker part acts with greater force to close the diaphragm and plug unit of the valve and whose thinner part may complete the closing motion so that the integral spring may weaken faster than linearly in relation to displacement of the diaphragm and plug unit. A snap seat supporting the plug may include a seat portion and a grip skirt portion integrally joined at an acute angle. A bracket and sliding guide may guide a helical rotor touching an indicator. Movement of the diaphragm and plug unit may rotate the helical rotor and the indicator without the indicator rising out of the valve. The cover may have an internal control passage in communication with a base of the valve to allow the cover to be installed horizontally and vertically conveniently and without disconnecting the control tubing above the valve.

Abstract: Disclosed are a method and device for modulating the downstream pressure output of a pressure reducing hydraulic control valve in response to the flow demand fluctuation the method comprising. Included is an adjustable pressure pilot valve mechanism having a drive element extending from the control valve. The drive element is displaceable in response to a flow capacity through the hydraulic control valve. Also included is an adjustable pressure pilot valve deployed along a control tube connecting an upstream pressure port to a downstream pressure port, the adjustable pressure pilot valve associated with the drive element such that adjustable settings of the adjustable pressure pilot valve are responsive to displacement of the drive element.

Abstract: A hydraulic control valve actuated by a diaphragm's integral spring whose thicker part acts with greater force to close the diaphragm and plug unit of the valve and whose thinner part may complete the closing motion so that the integral spring may weaken faster than linearly in relation to displacement of the diaphragm and plug unit. A snap seat supporting the plug may include a seat portion and a grip skirt portion integrally joined at an acute angle. A bracket and sliding guide may guide a helical rotor touching an indicator. Movement of the diaphragm and plug unit may rotate the helical rotor and the indicator without the indicator rising out of the valve. The cover may have an internal control passage in communication with a base of the valve to allow the cover to be installed horizontally and vertically conveniently and without disconnecting the control tubing above the valve.

Abstract: An air release vent valve having a valve body with an inlet port and a venting orifice; a direct float configured with an axial passageway; and a displaceable orifice closure rod deployed in at least a portion of the axial passageway, the displaceable orifice closure rod being longitudinally displaceable therein, wherein at least of portion of the displaceable orifice closure rod extends above the direct float and at least a portion of the displaceable orifice closure rod is configured to close the venting orifice when the water level in the valve body reaches a predetermined level. Also disclosed is a suspended surge prevention element that is suspended within the valve body at an adjustable distance from the venting orifice and configured to seal the initial vent orifice in response to a velocity of the flow of air through the valve body.

Abstract: An air release vent valve having a valve body with an inlet port and a venting orifice; a direct float configured with an axial passageway; and a displaceable orifice closure rod deployed in at least a portion of the axial passageway, the displaceable orifice closure rod being longitudinally displaceable therein, wherein at least of portion of the displaceable orifice closure rod extends above the direct float and at least a portion of the displaceable orifice closure rod is configured to close the venting orifice when the water level in the valve body reaches a predetermined level. Also disclosed is a suspended surge prevention element that is suspended within the valve body at an adjustable distance from the venting orifice and configured to seal the initial vent orifice in response to a velocity of the flow of air through the valve body.