Abstract: A drilling or tapping machine includes a housing having a front end through which a drill mounting stub projects; a drill shaft having an inner drill tube carrying a splined bush at a rear thereof and carrying the drill mounting stub at a front thereof, a support tube coaxial with the drill tube, having front and rear bearing nuts mounting the support tube on the drill tube for relative rotation; a spline shaft extending from rear to front through the drill tube, and slidably engaged within the splined bush whereby rotation thereof rotates the drill tube; a moving plate fixed to the rear bearing nut and moveable axially relative to the spline shaft, the moving plate engaging the drill tube to axially move the drill tube relative to the housing; a first drive rotating the spline shaft; and a second drive causing the moving plate to move axially.

Abstract: A clutch mechanism for a slurry valve, wherein the slurry valve has a valve seat for seating a valve closure member carried on a valve stem, a drive member threadably engaged with the valve stem, the drive member being rotatable relative to the valve stem to axially move the valve stem and closure member relative to the valve seat to open and close the slurry valve, and a driving means for rotating the drive member, the clutch mechanism comprising: a clutch body having an internally threaded bore for threadably receiving the valve stem; and clamping means actuable with the clutch body for clamping the clutch body to the driving means so as to lock the valve stem and drive member together and allow them to rotate in unison to grind scale from the valve seat and valve closure member when they are positioned against each other.

Abstract: A valve apparatus has a valve (1), an actuator (2) and a leakage sensor (3). A body (4) of the valve has first and second valve chambers (6, 8) connected to respective valve ports (10 & 12, 14 & 16) and joined by an intermediate passage (18). The valve can be set by the actuator to any one of three valve configurations. In an ‘open’ configuration the intermediate passage is open to interconnect the first and second chambers. In a ‘closed’ configuration, the intermediate passage is closed by first and second seals (24, 26) seated at respective locations in the passage to seal respectively between the first and second chambers and a leakage chamber (28) at the portion of the intermediate passage between the two seals. In a ‘cleaning’ configuration one of the seals is unseated to connect a respective one of the first and second chambers to the leakage chamber, while the other seal remains seated.

Abstract: An emergency isolation valve has a valve plug in a valve body connected to a pipeline. The valve plug is connected to a valve shaft around which a sector gear is provided and engaged with a rack of a piston rod in a cylinder. The piston rod has a piston at one end and is connected to a compression spring at the other end. The piston is moved by air supplied into a cylinder from a compressed air source via a fluid control and a solenoid selector valve. Air supply stops and a discharge hole of the cylinder is opened, so that air is discharged to the outside. The piston is returned by the compression spring to close the discharge hole. At the same time stop of the piston rod is detected by a sensor thereby checking whether to actuate the valve plug normally even during operation.

Abstract: A clutch mechanism for a slurry valve, wherein the slurry valve has a valve seat for seating a valve closure member carried on a valve stem, a drive member threadably engaged with the valve stem, the drive member being rotatable relative to the valve stem to axially move the valve stem and closure member relative to the valve seat to open and close the slurry valve, and a driving means for rotating the drive member, the clutch mechanism comprising: a clutch body having an internally threaded bore for threadably receiving the valve stem; and clamping means actuable with the clutch body for clamping the clutch body to the driving means so as to lock the valve stem and drive member together and allow them to rotate in unison to grind scale from the valve seat and valve closure member when they are positioned against each other.

Abstract: A drilling or tapping machine includes a housing having a front end through which a drill mounting stub projects; a drill shaft having an inner drill tube carrying a splined bush at a rear thereof and carrying the drill mounting stub at a front thereof, a support tube coaxial with the drill tube, having front and rear bearing nuts mounting the support tube on the drill tube for relative rotation; a spline shaft extending from rear to front through the drill tube, and slidably engaged within the splined bush whereby rotation thereof rotates the drill tube; a moving plate fixed to the rear bearing nut and moveable axially relative to the spline shaft, the moving plate engaging the drill tube to axially move the drill tube relative to the housing; a first drive rotating the spline shaft; and a second drive causing the moving plate to move axially.

Abstract: A valve apparatus has a valve (1), an actuator (2) and a leakage sensor (3). A body (4) of the valve has first and second valve chambers (6, 8) connected to respective valve ports (10 & 12, 14 & 16) and joined by an intermediate passage (18). The valve can be set by the actuator to any one of three valve configurations. In an ‘open’ configuration the intermediate passage is open to interconnect the first and second chambers. In a ‘closed’ configuration, the intermediate passage is closed by first and second seals (24, 26) seated at respective locations in the passage to seal respectively between the first and second chambers and a leakage chamber (28) at the portion of the intermediate passage between the two seals. In a ‘cleaning’ configuration one of the seals is unseated to connect a respective one of the first and second chambers to the leakage chamber, while the other seal remains seated.

Abstract: A field replaceable sensor module having a housing, that is capable of being ready connected and disconnected to a multipurpose device The housing includes one or more input ports and one or more electtical interface connectors. One or more sensors are operatively connected to the one or more input ports and attached to a surface of the housing. An electrical subsystem capable of receiving one or more signals from the one or more sensors provides one or more digitized output signals. A computer readable memory is also included to store sensor calibration data.

Abstract: A gate valve having a polymeric monolithic liner, the liner having cylindrical flange portions projecting from either side to form a fluid passageway through the liner, first and second housing portions forming a liner cavity, the liner being disposed in the liner cavity, a first face ring having a first cylindrical tubular portion and a first radially outwardly projecting, annularly extending face ring flange, the first tubular portion being received in the first annular flange portion of the liner, a second face ring having a second cylindrical tubular portion and a second radially outwardly projecting, annularly extending face ring flange, the second tubular portion being received in the second annular flange portion and a gate valve element slidably received in a valve element cavity formed in the liner.

Abstract: A field replaceable sensor module. The field replaceable sensor module of this invention comprises a housing, the housing being configured such that the housing is capable of being ready connected and disconnected to a multipurpose device and including one or more input ports, and one or more electrical interface connectors, one or more sensors operatively connected to the one or more input ports and attached to a surface of the housing, an electrical subsystem capable of receiving one or more signals from the one or more sensors and capable of providing one or more digitized output signals, and a computer readable memory having data stored therein, the data comprising sensor calibration data.

Abstract: A fault detection circuit in a boiler-water level system includes a dual-frequency signal generator which develops two AC components with no associated DC component. The two frequencies are mixed and sent through an impedance matching circuit to match the impedance of the signal generating portion of the system with the impedance of the boiler water under measurement. The impedance-matched signal is then directed to two legs, one leg directed through one of a plurality of electrode probes and then to a first filter circuit, and the other leg is directed a second set of filters. In combination, the filters pass either the higher or the lower of the two frequencies to determine an open or short condition in the level sensing circuitry, as well as a steam vs. water condition.

Abstract: An actuator assembly comprising at least one prime mover, a shaft having a first end and a second end, the shaft being operatively connected to the prime mover for reciprocal movement, a frame, the shaft being reciprocably movable in the frame, and linkage attached to the frame and operatively connected to the shaft, the linkage being movable between a first position and a second position in response to reciprocal movement of the shaft and a selectively engageable stroke-limiting assembly operatively connected to the shaft for controlling movement of the shaft, either by preventing any movement of the shaft or limiting its stroke a predetermined amount.

Abstract: A pilot operated safety relief valve (14) having a main piston valve member (26). A dome chamber (42) is provided in the valve body (18) over piston valve member (26) and a cap (44) forms a closure for dome chamber (42). A pilot valve (46) is mounted on the cap (44) and has a diaphragm actuated fluid inlet sensing tube (60) received within a bore (30) of the piston valve member (26). Inlet fluid pressure is communicated through bore (61) of sensing tube (60) to the inlet fluid sensing chamber (84) on the outer side of diaphragm (65). Exhaust chamber (56) is positioned between dome chamber (42) and inlet sensing chamber (84). Adjustment spring (67) continuously urges O-ring (72) in dome chamber (42) to a seated position on seat (70). An annular clearance (78) is provided between sensing tube (60) and piston (26) for providing a restricted fluid flow between dome chamber (42) and the inlet (20).

Abstract: A switch valve 10 is provided with an upper body 14 having a plurality of outlet ports 20A, 20B, and 20C and a lower body housing 16 with inlet port 18. The switch valve includes a ball member 22 which is rotatable within the switch valve body 12 for selective fluid communication between the inlet port 18 and the selected one of the plurality of outlet ports. The ball 22 is rotated by a stem 28, which may be powered by an actuator unit. The upper body 14 includes a substantially dome-shaped seating surface 40 for sealing engagement with the outer surface 38 of the ball. The biasing member 48 biases the ball radially in a direction opposite the ball inlet port 24 to obtain the desired sealing engagement. The biasing member is preferably a Belleville spring 48 having a single wrap design.

Abstract: A pilot operated safety relief valve (14) in which a pilot valve (32) controls the opening and closing of the main valve member (26). The pilot valve (32) has a spindle valve member (70) between an intermediate dome fluid chamber (52) and an exhaust chamber (54) communicating with exhaust port (52) and exhaust line (38). Spindle valve member (70) has an annular sealing member or membrane (104) having a relatively thin body (105) with opposed beads (106, 108) along inner and outer peripheries of body (105) for sealing between spindle valve member (70) and the adjacent retainer sleeve (94). Any positive backpressure forces from exhaust line (38) are balanced against spindle valve member (70) by annular seal (80) and membrane (104).

Abstract: A pilot operator and a relief valve are provided in the same housing. The pilot-operating mechanism is contained partially within the main closure element of the valve and partially within the valve cap. Inlet pressure to the valve is communicated to the pilot via an access passage extending through the main closure element. In response to high-pressure flow from the inlet, a pilot piston moves a spacer rod through the passage and into engagement with a spring-loaded vent closure. The piston-induced movement of the rod opens the vent to relieve the pressure behind the main closure element, which in turn permits the main closure element to open and relieve the inlet pressure through the valve outlet. Opening of the main closure element terminates flow through the access passage. When the inlet pressure is sufficiently reduced, the pilot piston is unseated by the spring force re-opening the access passage to allow the pressure behind the main closure element to increase and close the main closure element.

Abstract: A valve body with a diverted flow passage extending between the inlet and the outlet is provided with a closure element that is mounted between the inlet and outlet and movable between first and second lift points for regulating fluid flow through the passage. A baffle disposed in the flow passage intermediate the first and second lift points alters one or more flow characteristics of the fluid to improve the efficiency of fluid flow through the valve. In a right angle body valve, the baffle takes the form of a plate with an aperture positioned concentrically with the inlet passage and the valve closure element. A top plane surface of the baffle plate is positioned below the centerline of the outlet and is perpendicular to the centerline of the inlet. The baffle separates turbulent areas of flow in the passage so that the pressure and flow of fluid exiting the valve are more uniformly distributed over the entire outlet.

Abstract: A rotary valve is provided including a valve element mounted within the flow path of a valve body and rotatable about a stem axis. A peripheral seating surface on the valve body surrounds the flow path through the valve body and is spaced from the stem axis for sealing engagement with the valve element when rotated to its closed position. The peripheral seating surface on the valve body is preferably annular, and more preferably has an arcuate cross-sectional configuration and includes a central annular seating line spaced closer to the center point of the valve than adjoining upstream and downstream portions of the seating surface. The valve element includes a rigid body with a peripheral resilient overlay. The resilient overlay has a peripheral pressure-responsive sealing member for flexing in response to fluid pressure into sealing engagement with the seating surface.

Abstract: A valve manifold having a manifold body with a first face, an opposed, substantially planar second face, and a peripheral wall, a first inlet, a second inlet, a first drain port, and a second drain port being formed in the first face, a first outlet and a second outlet being formed in the second face, there being a first, fluid communication pathway/valve for controlling fluid flow between the first outlet and the second outlet, a second, fluid communication pathway/valve for controlling fluid flow between the first inlet and the first outlet, a third, fluid communication pathway/valve for controlling fluid flow between said first drain port and said first outlet, a fourth, fluid communication pathway/valve for controlling fluid flow between the second inlet and the second outlet, a fifth, fluid communication pathway/valve for controlling fluid flow between the second drain port and the second outlet, flow paths opening into the outlets sloping away from said second face.