Abstract: An analysis unit formed by an analysis body housing an analysis chamber and having a sample inlet and a supply channel configured to fluidically connect the sample inlet to the analysis chamber. Dried assay reagents are arranged in the analysis chamber and are contained in an alveolar mass. For instance, the alveolar mass is a lyophilized mass formed by excipients and by assay-specific reagents.

Abstract: A multi-seat bonnet for a valve assembly comprising is disclosed herein. The multi-seat bonnet includes a locking mechanism that is configured to secure the multi-seat bonnet to the valve assembly. Further, the multi-seat bonnet includes a first sealing surface configured to engage a high pressure seat, in addition to a second sealing surface configured to engage a low pressure seat.

Abstract: A liquid dispensing device for use with a flexible bag containing a liquid and having a spigot connected thereto includes a housing, a valve assembly and a member. The housing includes an upper part having a receiver configured to receive the spigot. The valve assembly is housed within the receiver and includes a liquid channel and a valve. The liquid channel has an inner end configured to connect to the spigot, and an outer end opposite the inner end. The valve, which is positioned closer to the outer end than the inner end, includes a closed position, in which a flow of the liquid through the liquid channel is prevented, and an open position for dispensing the liquid through the liquid channel. The member is configured to keep the spigot in a permanent open position when the spigot is connected to the inner end of the liquid channel.

Abstract: A linear actuator includes a stator assembly and a rotor assembly operatively associated with the stator assembly and mounted for rotation with respect to the stator assembly. A shaft is restricted from rotation and is associated with the rotor assembly such that rotation of the rotor assembly causes linear movement of the shaft. A capnut is associated with a distal end of the shaft for movement therewith. A shroud is coupled to the stator assembly and substantially surrounds the capnut. The shroud includes a valve seat, and an inlet communicating with an outlet through a throttle opening adjacent to the valve seat. The shaft and associated capnut are constructed and arranged to move relative to the valve seat to control air flow between the inlet and the outlet.

Abstract: A valve for controlling fluid flow from an inlet of a pipe fitting to at least one outlet of the pipe fitting at an angle to the inlet. The pipe fitting includes an inner collapsible bellows fixed at a position opposite the inlet. The bellows has a support annulus at the other end adjacent the inlet, whereby, in a closed position, the bellows prevents fluid flow from the inlet to the at least one outlet as the fluid is trapped within the bellows. In an open position, the fluid can flow from the inlet to the at least one outlet when the bellows is collapsed.

Abstract: A durable diaphragm valve has a single-layer structure consisting of rubber materials. The single-layer structure has a membrane part deforming and moving up and down with opening and closing of a flow channel and a flange part which is provided around said membrane part and sandwiched between a valve body and a bonnet. The flange part has an annular ridge consisting of an upper ridge protruding upward and a lower ridge protruding downward from a position corresponding to said upper ridge. The upper ridge has an inner upper ridge and an outer upper ridge with its protruding height being lower than the inner upper ridge, which are consecutively formed in a staircase pattern.

Abstract: Valves include a valve body having an inner surface and an outer surface, the inner surface and the outer surface defining an inlet, an outlet, and a body cavity between the inlet and the outlet; a gate movably coupled to the valve body and moveable over a portion of the valve body at least partially between the inlet and the outlet, the gate including a cam stop; and a drive assembly, the drive assembly including a pair of drive lines, each drive line having a drive shaft, a first drive line of the pair of drive lines including a sync cam, the sync cam of the first drive line movably positioned on the drive shaft of the first drive line and positioned relative to the cam stop.

Abstract: The invention relates to an axial valve comprising an actuator (15) and a center tube (19). The actuator comprises a stationary element (16) and a closing element (17), and the center tube (19) is placed axially in relation to an axial extension of the stationary element (16). The center tube (19) is in a fixed position relative to the stationary element (16). Fluid, such as refrigerant, is intended for flowing through the valve and through the center tube. The center tube (19) comprises orifices (22) for fluid passage. The closing element (17) is placed axially to an axial extension of the center tube (19) and is movable axially along the center tube between a first position, where the closing element closes the orifices (22) of the center tube, thereby not allowing fluid to pass the orifices, and a second position, where the orifices (22) are open, thereby allowing fluid to pass the orifices.

Abstract: The present invention features a coke drum de-heading system. The de-header valve is equipped with a valve body, a gate, a transmission system and an actuator. Actuation of the valve closure functions to open and close the de-header valve.

Abstract: A discharge valve assembly includes: a valve casing that has an intake bore, an air chamber communicating with the intake bore, and a discharge aperture communicating with the air chamber; a metal intermediate ring disposed in the air chamber and having a valve hole that communicates with the air chamber, and at least one connecting aperture that communicates with the discharge aperture and the valve hole; a base ring that retains the metal intermediate ring in the air chamber and is mounted on the valve casing; and an adjuster that is disposed in the base ring and movable relative to the base ring to adjust an air flow through the valve hole.

Abstract: A valve device has integrally assembled thereto a valve side housing 2 having a valve seat 1, a motor side housing 4 provided with a motor 3, and a feeder-side housing 5 having a feeder unit, wherein a valve stem 8 provided with a valve 7 for abutting against the valve seat 1 is extended to the interior of the feeder-side housing, a rotation stopper 9 of the valve stem 8 is provided at a predetermined position of the valve stem on its way to the feeder-side housing, a screw section 11 is provided around the portion of the valve stem passing through the center hole 35a of the rotor 35 of the motor 3, the screw section being in mesh with a thread section 10 formed around the surface of the center hole thereof, and a valve position detecting sensor is provided within the feeder-side housing 5.

Abstract: A flow rate control apparatus includes a valve mechanism capable of controlling a flow rate of a pressure fluid that flows from a second port to a first port. Second stopper walls are formed on a seating section of a needle valve constituting the valve mechanism and which is capable of advancing and retracting in an axial direction. In addition, in a total valve-closed state when the seating section of the needle valve is seated on a seat of a first body, the second stopper walls come into abutment and are stopped in a circumferential direction of the needle valve with respect to first stopper walls of the first body.

Abstract: A spindle of a valve includes a frame part, with a bore having a valve spindle arranged in a movable manner within the bore. The valve spindle is fitted to be moved with an adjustment member that is connected to the frame part and can be rotated with respect to the frame part. The adjustment member includes an aperture, through which the valve spindle extends. The adjustment member includes an internal thread part that is fitted to the counterthreads of the spindle part wherein when the adjustment member is rotated the valve spindle moves along with the rise of the threads. Rolling members are fitted between the frame part and the adjustment member. The rolling members are positioned in an aperture or embedded into the first frame part or the adjustment member. A rolling groove is provided in the second frame part or the adjustment member.

Abstract: An actuator for displacing a control device including a valve, a gate valve or the like, in particular for use in oil or gas production systems, said actuator comprising an electric drive and a thread drive displaceable by means of said electric drive. The thread drive comprises at least a threaded spindle and a screw nut. The threaded spindle is displaceable in a substantially axial direction between an advanced position and a retracted position so as to displace the control device. In order to improve an actuator of this kind in such a way that advantages of an already known actuator will be maintained on the basis of a smaller number of components and a more compact structural design and a reduction of the manufacturing costs can simultaneously be accomplished, the electric drive comprises at least one torque motor with a hollow shaft, said hollow shaft being connected to the driven side of a safety clutch unit such that it is secured against rotation relative thereto.

Abstract: A flow amount adjusting valve includes a handle that enables an opening/closing amount of a valve plug to be adjusted. A piston connected to the valve plug is screw-engaged with a first axial portion of the handle. Additionally, along with displacement of the valve plug in the axial direction via the piston under a rotating action of the handle, an indicator element is accommodated in an interior portion of the handle. A first indicator undergoes screw-engagement with respect to the handle, and the indicator element is displaced together with displacement of the valve plug, such that displacement of the valve plug can be confirmed visually from outside the flow amount adjusting valve.

Abstract: A manual valve comprises a valve element, a rod connected to the valve element, and a knob for moving the rod by screw feeding in an opening/closing direction with respect to the valve element. The valve element is moved by rotation of the knob through the rod. The rod includes an external thread portion on an outer periphery thereof and is not connected to the knob and is held against rotation. Further, the manual valve includes a cylindrical sliding nut rotatably held by a body and formed with an internal thread portion to be engaged with the external thread portion of the rod on its inner periphery and a clip fixed to the knob to be elastically deformably engaged with the sliding nut but disengaged when a larger torque than the predetermined value is applied.

Abstract: An idle air control valve (11) for a vehicle includes a stator assembly (12) and a rotor assembly (26) operatively associated with the stator assembly and mounted for rotation with respect to the stator assembly. A shaft (36) is restricted from rotation and is associated with the rotor assembly such that rotation of the rotor assembly causes linear movement of the shaft. A pintle (38) is associated with a distal end of the shaft for linear movement therewith. A journal (28) is associated with the rotor assembly and is constructed and arranged to support and permit rotation of the rotor assembly relative to the stator assembly. Lubricant (30) is provided between a surface of the journal and a surface of the rotor assembly.

Abstract: Assemblies and methods are provided for use in coupling a component to an actuator, where the component includes a stem and a drive nut, and the stem is configured to be rotated by the actuator and to move linearly through an opening in the drive nut. In an embodiment, the assembly includes a coupling mechanism, a drive ring, and a carrier, where the coupling mechanism and the carrier each include slots and the drive ring includes projections that correspond with the slots.

Abstract: A flow control valve includes a valve body defining fluid inlet and outlet sections interconnected by a connecting port. A valve unit is disposed in the valve body and is operably connected to an actuator to be moved thereby for opening and closing the connecting port. The valve unit includes a valve element which has a bleed passage extending therethrough for communicating the fluid inlet and outlet sections with one another. A bleed piston is operably connected to the actuator and is movable thereby relative to the valve element for opening the bleed passage when the valve unit is in a port-closing position. The valve unit also includes a pressure balancing passage which communicates front and rear ends of the valve element with one another and tending to aid in statically and dynamically balancing the fluid pressures acting on the valve element.

Abstract: A valve apparatus, and combined valve-regulator apparatus, for safely regulating the flow of combustible gases such as oxygen.

Abstract: There is disclosed a valve comprising a valve stem threaded with a translator having a flow modulating region, in which rotation of the valve stem about its axis causes the translator to move axially relative to the valve stem. In one aspect, the threads on the translator and the valve stem threads have substantially similar coefficients of thermal expansion. In another aspect, a protrusion limits axial movement of the valve stem in one direction, the valve stem has at least one protuberance, at least one gland is engaged with the valve body, and at least one shim is positioned between the protuberance and the gland so as to limit axial movement of the valve stem relative to the valve body in an opposite direction. There are also disclosed power generating systems including such valves, and methods of constructing such valves.

Abstract: A valve, such as a liquid level sight glass gage valve, has a valve unit and a passageway that extends through the valve unit. The passageway has a stem receiving area, a seal receiving area, and a bonnet receiving area that has a non-circular inner perimeter. A packing assembly is provided to isolate the bonnet receiving area from the fluid path. A bonnet is located within the bonnet receiving areas and has a non-circular outside surface for mating relationship with the non-circular inner perimeter of the valve unit. A valve stem is in sealing relationship with the packing assembly and selectively engages a valve seat. The stem threadably engages the bonnet. A bonnet nut is threadably received on the valve unit for securing the bonnet within the valve unit and allowing axial movement of the bonnet against the packing assembly, thereby effecting compression of the packing.

Abstract: A metering valve assembly is provided with a valve stem having one or more tapered channels formed therein for selective engagement with a valve seat to provide incremental regulation of fluid flow through a valve housing. An adjustment knob provides one manner of reciprocal movement of the valve stem within the valve housing. Alternatively, the valve stem can be directly engaged for rotational reciprocal movement within the valve housing. Different embodiments of the valve stem are provided for alternate fluid flow regulation requirements. The metering valve assembly is comprised of a limited number of component parts for ease of manufacture as well as the replacement and exchange of component parts in the field.

Abstract: A gate valve is disclosed which comprises a valve body which includes a flow bore that extends completely therethrough and a gate cavity that extends partially therethrough and intersects the flow bore, a bonnet which is connected to the valve body over the gate cavity, a gate which is disposed in the gate cavity across the flow bore and includes a transverse opening that extends completely therethrough, a valve stem which includes a first portion that is connected to the gate and a second portion that extends through the gate cavity, a handwheel, and a roller screw assembly which is connected between the handwheel and the second portion of the valve stem and which converts rotation of the handwheel into translation of the valve stem. In this manner, translation of the valve stem raises or lowers the gate to bring the opening into or out of alignment with the flow bore to either open or close the gate valve, respectively.

Abstract: The invention is an improved conduit flow controller for selectively controlling the flow of fluid through an elongated conduit. The conduit has an aperture defined by a continuous peripheral edge in the sidewall of the conduit. An elongated housing surrounds the aperture and is sealingly connected to the conduit. A conduit stopper is movably mounted in the housing and is positionable in the conduit. The conduit stopper includes a deformable sealing element having opposed flat sides and an edge engageable with the conduit. A carrier is sealingly connected with the sealing element. A resilient seal is mounted on a carrier and is engageable with the continuous edge. The sealing element is cooperative with the seal to close a portion of the conduit to regulate the flow of fluid along the elongated conduit.

Abstract: Coaxial valves usually contain only one moving part. It has not been easy, then, to provide for electric motor actuation. Many actuators being proposed involve designs which lead to bulky packages. The key facing those improving coaxial valves is the provision of suitable linear actuation. The valve herein includes a valve housing with a flow channel therethrough. Arranged in the flow channel is a closing body. In alignment with the closing body is a ball screw actuator which includes a ball nut and a cylindrical screw. The ball nut surrounds a threaded portion of the cylindrical screw. The cylindrical screw is provided with a passageway therethrough through which fluid flows. The cylindrical screw is disposed in the flow channel to become a control tube adapted to move toward and away from the valve seat. To rotate the ball nut an actuating drive is employed driven by a stepper motor.

Abstract: A hand drive for shut-off members is described, for example for membrane valves, the hand drive comprises a hand wheel for actuating the valve which is provided with a closure limiter and a valve lift limiter, the hand wheel is provided with two inserts mounted thereon for axial adjustability; and wherein the inserts interact with a threaded spindle coupled with a valve element so as to adjust the valve lift limiter and the closure limiter.

Abstract: This invention relates to a bleed valve of a compressor, in particular a compressor of a bypass aero-engine, with a guiding device provided downstream of a valve body in the bleed duct, said guiding device directing the bleed airflow from a compressor duct to a bypass duct in such a manner that the direction of the flow of the bleed airflow is imparted with a component which is unidirectional with the airflow carried in the bypass duct. The present invention provides a dissipation screen in the bleed duct between the valve body and the guiding device to reduce the energy contained in the bleed airflow, thereby decreasing the loading of the bypass duct. Moreover, the present invention provides for an attenuation chamber downstream of the dissipation screen as viewed in the direction of the bleed airflow.

Abstract: The present invention provides a motor-operated valve having no additional stopper for stopping the rotation of a rotor at fully open and closed states of the valve to allow a reduced number of parts of the valve and to prevent a noise otherwise generated by the abutment of the rotor against a stopper. The motor-operated valve includes a rotor 17 having a shaft 18 formed with an external thread 20. The motor-operated valve also includes a needle valve element 6 having a needle valve head 5 at one end portion thereof and an internal thread 16 engaging with the external thread 20 at another end portion. The valve element has a joining portion 14 for joining the valve head to the internal thread 20. The motor-operated valve also includes a main valve body 1 having a guide portion which stops the rotation of the valve element but allows the axial movement of the valve element.

Abstract: A multiple mode valve assembly including valve actuators equipped with a combination of a shaft (4) and a spindle (5), coaxial and immobilized in an axial direction, but capable of rotating freely one with respect to the other, so that by means of the spindle (5), through a threaded nut assembly (6) and the pertinent motor (9), the longitudinal displacement of the gate (3) is produced in valve opening and shutting operations, whilst by means of direct application of a rotary movement to the shaft (4), which does not affect the spindle (5), from a second motor (23), the gate (3) turns on the valve seat (2), in the shut position, producing a friction effect and consequent self-cleaning of the seal.

Abstract: A stem valve stopper that has a shell (1) intended to be mounted to a faucet (K). An operating stem (8) is mounted for rotation but is axially fixed in the stopper shell (1) and has a lower end that acts as a valve seat surface (12). The stem 8 has an interior section (7) that is threadably engaged with a mobile fitting (6) that is mounted in the shell so that it can be moved axially but cannot be turned or rotated inside the stopper shell. The mobile fitting (6) has an annular lower end surrounding a valve seat (12). A valve sealing member (17) made from elastomeric material is mounted in the lower end of stopper shell (1) and is spring biased downstream toward the valve seat (12). The mobile fitting (6) can be operated to push the sealing member (17) upstream away from valve seat surface (12) and provide flow about the valve seat (12).

Abstract: A dump-valve device for a craft, characterized in that it comprises: a plug valve (13) movable approximately rectilinearly relative to a fixed seat (17) supported by a craft transom plate (3), drive means (9, 10) mobile in rotation along a rotary stroke of limited angular amplitude and able to be activated from inside the craft, and coupling means (11, 19) interposed between the valve (13) and the drive means (9, 10) to convert the rotary stroke of limited angular amplitude of the drive means into a rectilinear stroke of limited linear amplitude of the valve.

Abstract: A valve assembly for controlling the flow of refrigerant and coolant through an HVAC system is provided. The valve assembly includes a refrigerant housing defining a refrigerant conduit with a refrigerant inlet and a refrigerant outlet. A refrigerant valve is disposed within the refrigerant conduit for controlling the flow of refrigerant between the refrigerant inlet and the refrigerant outlet. The assembly also includes a coolant housing defining a coolant conduit with a coolant inlet and a coolant outlet. A coolant valve is disposed within the coolant conduit for controlling the flow of coolant between the coolant inlet and the coolant outlet. An actuator assembly is coupled to the refrigerant and the coolant valves for simultaneously actuating the valves.

Abstract: The invention relates to a valve self-piercing tap for a plastic tube with a plastic housing (1) which has a branch connection member (2) and holds a valve body (3), in which a blocking body (5) engaged with a threaded spindle (6) and carrying a punch ring (9) for forming an opening in the plastic tube is displaceably arranged to be moved into axial engagement with a valve seat (10) to block access to the branch connection member (2). To avoid sealing rings, the valve body has at least one circumferential groove (12) with a side (13) directed towards the outlet (11). The housing is injection-molded around the valve body.

Abstract: The valve operator of the present invention provides an apparatus and method for reducing torque necessary for opening and closing a valve, such as a quarter-turn rotary valve. In the preferred embodiment, an outer handle adaptor has inner curved tracks that drive balls positioned in straight slots of a middle cylinder. As the balls move in the straight slots, they transfer torque energy to a valve shaft adaptor mounted within the middle cylinder and having outer curved threads that mesh with the balls. The pitch of the curved tracks of the outer handle differ from the pitch the curved tracks of the valve shaft adaptor to thereby effect a desired torque reduction ratio. The valve operator has relatively few components, at least three or more relatively rotatable components, preferably arranged in meshing configuration so as to effect a small size operator without the use of a gear box.

Abstract: An improved continuously variable micro control valve and an apparatus and a method employing the same for making semiconductors enable a computer to precisely set a driver of the micro control valve such that the accuracy of the control valve in reproducing a flow value for a given setting of the driver is at least 1/1000 of a maximum flow value for a relatively wide range of flow values which can be provided by the micro control valve. The relatively wide range of flow values is at least 1000 to 1 in a disclosed embodiment with a resolution sensitivity of the micro control valve being at least 1/10,000 of the full scale of the relatively wide range of flow values. The improvement in repeatability and accuracy afforded by the micro control valve can result in higher yields in semiconductor making.

Abstract: A piston valve for use in connection with the fire protection industry is disclosed which includes features for protecting against corrosion. A sacrificial zinc anode is mounted in the body of the valve under the handwheel. A polymeric piston is used which cannot corrode. A grease fitting protects against corrosion at the interface of the spindle and the valve body or bushing within the body.

Abstract: A shut-off valve (1, 101) including a valve housing (2, 102) having a flow passageway (3, 103); a shut-off member (22, 122) displaceably arranged in the housing between an open position and a closed position of the valve flow passageway through an actuator device (15, 115). The actuator device includes a nut member (20, 120) provided with an internal thread (21, 121) having a first thread pitch, and an outer stem member (17, 117) provided with an external thread (19, 119) engaging the internal thread (21, 121) of the nut member, and with an internal thread (18, 118) (21, 121) with a second pitch differing from the first pitch and engaging a corresponding external thread (12, 112) on an inner stem member (6, 106). The threads coacting during the major part of the closing movement of the shut-off member (22, 122) are provided with larger pitch than those coacting during the final part of the closing movement.

Abstract: The invention concerns a tap fitting in which the gap between the tap spindle and the spindle lead-in in the housing is sealed off by means of a bellows-type seal. The end of the seal nearest the housing is connected to a sleeve which is sealingly mounted in the housing.

Abstract: A screw member is screwed into a spool which is axially movably inserted into a housing. The opening of the throttling portion of a variable throttle valve is varied according to the axial shifting of the spool according to the rotation of the screw member. The centerline of the screw member is eccentric to the centerline of the spool. The eccentricity prevents the spool from rotating together with the screw member.

Abstract: The present invention is directed to a dual backseat valve assembly comprising a valve body having an interior valve chamber and a generally horizontal flow passage; a valve gate adapted to reciprocate vertically within said valve chamber; a valve stem adapted to be received in threaded engagement with a gate lift nut mounted in said gate such that rotation of said stem causes vertical movement of said gate and a valve bonnet fixed to said valve body receiving said stem therethrough; wherein the valve stem comprises a radially extending portion defining a downward facing surface, a first enlarged diameter portion proximate the radially extending portion and a reduced diameter portion adjacent the first enlarged diameter portion; a first backseat seal comprising a radially energized seal ring fixed relative to said bonnet and having a first sealing portion for sealing against said bonnet and a second sealing portion which is adapted to be spaced apart from said reduced diameter portion when said valve is in no

Abstract: A noiseless valve includes a leading spiral spindle (4) having a thread (8) at one end by which it is screwed into a spiral (8') of a piston holder (10). The piston holder (10) has a cylindrical shape and is placed into a valve body (1). The leading spiral spindle is secured by the key (13) in axial direction. A piston (12) is attached to an upper part (12) of the holder (10). The piston (16) has an edge rim with two teeth (18) cooperating with grooves (22) furnished on posts (21) of a rubber seal holder (19). The rubber seal holder (19) is attached to the valve body (1) at an end where the piston (16) stands out. The piston (16) is pressed against a rubber seal (23) placed in the rubber seal holder when the valve is closed. Two spiral teeth (6', 10'), disposed diametrically opposed and mutually shifted by 90.degree., are provided on a bottom head surface of the piston holder (10) and on a rim (6) of the leading spiral spindle (4).

Abstract: A valve comprises a body for connecting to a pipe, the body having a passageway therethrough for communicating with the pipe; a member disposed within the passageway, the member being movable between open and closed positions for permitting and stopping flow through the pipe, respectively; a stem secured to the member; a nut operably secured to the stem, the nut being axially stationary relative to the stem and rotatable thereabout; an actuator for rotating the nut such that rotation of the nut causes the stem to move the member between the open and closed positions; a first bearing adapted to radially center the stem within the nut, the first bearing adapted to permit the stem to slide axially relative thereto; and a second bearing operably associated with the first bearing adapted to reduce rotational friction between the nut and the stem.

Abstract: A magnetic security device for preventing unauthorized opening of fire hydrant valves includes an inner cylindrical member which is fixed to a nut on the valve stem and an outer rotatable member which is coupled to the inner cylindrical member by a magnetizable element. The magnetizable element is attracted to move from an uncoupled to a coupling mode by a reaching permanent magnet integral with a special operating wrench. In accordance with one embodiment of the invention, an intermediate sleeve is provided which is coaxial with a nylon sleeve disposed around the outer surface of the inner cylindrical member. In addition, the inner cylindrical member has a knurled portion which engages the surface of a recess surrounding the valve operating nut so that if the outer operating member is tilted with respect to the inner operating member, the inner operating member binds with the wall of the recess, preventing rotation of the inner operating member and of the valve operating nut attached thereto.

Abstract: A stop valve which is in particular constructed as a valve top for a sanitary fitting, contains an actuating member constructed as a rotary spindle. The actuating member, which is held in axially non-displaceable manner, engages with a hexagonal neck in a closing body, whose external thread engages in an internal thread of the valve top. The closing body has a closing face cooperating with a valve seat. The valve seat is displaceable to a limited extent in the axial direction and contains a rubber-elastic member.

Abstract: A tapping fitting for a pipe, preferably a plastic pipe, includes a rotatable blade assembly threaded within a sleeve non-rotatably received within a housing such that rotation of the blade assembly causes it to cut a cylindrical slug from the pipe to which the housing is attached. The opposite faces of the sleeve are exposed to the fluid pressure within the pipe thereby producing a balance of forces substantially eliminating transverse creep. In addition, the attaching section of the fitting is formed with a bore which is engageable by a sealing ring received around the rotatable blade assembly and which is of sufficient length to accommodate any axial creep, thereby enabling the blade assembly also to serve as a valve.

Abstract: A check valve made of plastic for containers of liquids. The check valve includes a valve housing having an inlet connector and an outlet opening. The outlet opening includes a valve seat. A linearly displaceable valve sealing body can be moved toward and away from the valve seat.

Abstract: A resilient seat gate valve is provided with a housing having an opening for receiving the operating stem for the valve and a cover with a seal for the cover to the housing opening comprising a step peripheral surface and an angled surface located interiorly of the valve housing opening; the cover is provided with a locking mechanism for drawing the opening peripheral surface against the angled surface of the housing lip to compress the seal carried by the peripheral surface of the cover and to effect the attachment of the cover in place without bolts or screws; the valve disc is provided with side edges covered by an elastomer and protected with a fully enclosing, replaceable cap to prolong the life of the valve disc by protecting the elastomer coating from abrasion; a dumbbell dirt and fluid pressure seal O-ring arrangement is provided between the cover and lip of the housing to facilitate insertion and positioning of the seal during installation of the cover.

Abstract: An improved valve plug actuator is provided which is substantially impervious to environmental contamination and which provides greater axial transfer of seating force to an associated valve plug. The actuator uses an indexing race formed in an indexing sleeve to support a thrust bearing on one side of an operating screw collar and an enhanced retaining ring to capture an opposing thrust bearing. Lubrication containment and environmental isolation of the interactive surfaces of the actuator is maintained by o-ring seals carried by the retaining ring and by a lowermost movable component of the actuator which also is rigidly affixed to the associated valve plug.

Abstract: A gate valve has a housing for a valve seat, and an attachment which extends outwardly from the housing and constitutes an extension thereof. A cap is secured to the attachment at the end of the latter remote from the housing, and a plate which traverses the attachment is held between the cap and the attachment. An externally threaded, non-rotary valve stem extends between the cap and the housing and passes through the plate. The valve stem meshes with an internally threaded, rotatable sleeve which receives the valve stem and is connected to a handwheel. The sleeve is at least partially confined by the cap and the plate, and both the cap and the plate are provided with bearing locations for the sleeve.