Abstract: A valve for controlling flow of abrasive media from a blast tank to a nozzle, utilizes rollers for constricting a straight-through tube. In this way the valve meters the flow of the abrasive media into a blast hose through which air is directed under pressure as a carrier for the media. Contact with the media within the valve is limited to a radially constrictable tube adapted for ready replacement as the only component subject to the destructive characteristics of media such as mineral grit, sand, or the like. In association with the pinch tube housing, means is provided permitting ready interchange of manual and automatic tube-constricting assemblies. In the automatic configuration, the size of the valve orifice through which the media passes can be accurately and swiftly regulated by varying the pressure on a diaphragm.

Abstract: An improved butterfly valve in which the body flow passageway receives a pair of seat ring retainers, each retainer having a cylindrical sidewall with planar rearward faces and with planar rearward faces which are at an acute angle to the plane of the rearward end faces, the forward end faces having a groove therein. When the retainers are assembled within the valve body a toroidal seat ring can be received in the groove between the retainers. A disc having a circumferential sealing surface is rotatably supported in the valve body to close against the seat ring.

Abstract: A valve mechanism for low temperature applications comprising an outlet for a low temperature fluid, valve means for opening and closing said outlet, an axially movable rod having one end secured to said valve means and the other end extending outwardly to a normal temperature zone, means for holding said rod, resilient means located in said normal temperature zone for urging said rod toward a position wherein said outlet is closed by said valve means, and means for selectively applying a pressurized fluid to said rod to exert a force counter to said resilient means, whereby said rod and valve means may be displaced and said outlet opened.

Abstract: A butterfly valve resistant to corrosive gases. The valve body carries a valve seat ring having an elastic layer and an inner lining layer composed of polyvinylidene difluoride. The moisture permeability of the elastic layer is higher than that of the lining layer. On the outer surface of the valve seat ring facing the valve body, annular grooves are formed. Through the wall of the valve body, there are formed vents for moisture. These annular grooves and vents for moisture are communicated with each other. When the moisture contained in corrosive gases permeates through the lining and elastic layers, such moisture will easily be drained through the vents. Thereby, moisture permeated through the valve seat ring will not accumulate between the valve seat ring and the valve body. This prevents deformation of the valve seat ring, and extends valve use.

Abstract: An automatic hose winding apparatus includes a reel rotatably coupled between first and second side members of a frame. A clutch is coupled between a motor and the reel for selectively imparting rotary motion thereto. A guide assembly including a traversing screw, a follower mounted on the traversing screw, and a guide bar, guide the hose onto the reel. A lever assembly coupled to the frame and responsive to rotation of the guide bar disengages the clutch just prior to turning the motor off.

Abstract: A non-stick glass stopcock includes a sleeve interposed between a stem tapered body and a tapered valve seat. The sleeve permits operation of the stopcock while eliminating the need for any grease to be located between the stem and valve seat tapered portions. The adjustment mechanism maintains adjustment when the stopcock moves between open and closed positions.

Abstract: An exhaust air valve for placement in a ventilation conduit through which air is exhausted from a space to be ventilated. The valve has a casing with a concave seat surface facing upstream of the flow through the conduit and having a central valve orifice. A convex valve element cooperates with the seat surface and when the valve is closed engages the seat surface along a line of contact surrounding the seat. The curvature of the respective surfaces is the same, at least along the line of contact to ensure a tight closure of the orifice by the valve body. When opening, the valve body slides along the curved surface and the upstream surface of the valve body exposed to the flow is also convex to guide the flow toward the center of the orifice. Several embodiments are illustrated including valves with cords for remotely controlling the valve and heat-sensitive tripping mechanisms which automatically close the valve in the event of a rise in temperature above a preset level.

Abstract: An externally actuated valve assembly especially suitable for use in liquid chromatography is disclosed herein. This assembly is designed to control the flow rate of a fluid through an elastomeric conduit by acting on a relatively long section of the conduit in a way which varies the cross-sectional configuration of its passageway, preferably in a uniform manner along the entire length of the passageway, in order to vary the flow rate of fluid therethrough a corresponding amount.

Abstract: Disclosed is a slide valve in which the valve internals, the valve seat, guides and slide valve are maintained in position by a clamping action of an abutment in the valve body and on the valve liner secured in the body by a quick make-up connection. The slide valve is suited for all sizes of valves, both large and small and no screws or other fasteners are needed to maintain the valve internals in position. Advantageously, the guides and slides of the slide valve are maintained out of the flow path, and the valve internals including the orifice assembly with its valve seat and guides, and slide valve with its slides are readily removable through the bonnet area.

Abstract: An improved glandless plug valve of the type in which a tapered plug fits into a tapered bore in a valve body is provided wherein the tapers formed on the plug and in the body coact to form a body seal. A stem seal is also provided. The stem seal comprises a ring-like sealing member confined within mating grooves in the top of the plug and in a floating seal member. The floating seal member is biased downwardly to effect the seal between itself and the ring-like seal member. The bias force is transmitted to the plug valve urging it into engagement with the body of the valve, to provide a good body seal. In a preferred embodiment, the valve and plug are lined such that the valve is suitable for use in connection with corrosive liquids or slurries. The floating seal provides automatic compensation for temperature induced dimensional changes and for wear.

Abstract: A valve includes a molded plastic body portion having an internal chamber with upper and lower portions. Fittings connect the valve to conduits of a piping system. A valve seat surrounds inlet and outlet openings in the chamber lower portion. A plastic plug member is rotatably positioned in the valve seat. The plug member is a molded unitary element. The valve body portion and plug member have a substantially uniform wall thickness throughout. The plug member includes an integral plug portion and an actuator portion which facilitates ease of disassembly of the valve for repair. The plug portion has a flow passage which communicates with the inlet and outlet openings in the valve seat and is rotatable between open and closed valve positions. Seals retained on the plug portion engage the valve seat in the closed position. The actuator portion includes shearable stops which permit 360.degree. rotational operation of the plug member upon failure of the stops under excessive torque.

Abstract: An improved annular blowout preventer having a body with a central bore, an annular packer chamber facing the bore, an improved annular packer in said chamber and means for axially loading said annular packer to actuate it to closed position, said improved annular packer including a resilient annulus including an upper set of insert plates embedded in said annulus, a reaction ring embedded in the outer periphery of said annulus and means for moving said reaction ring toward said upper set of insert plates responsive to actuation of said packer loading means to ensure inward movement of said insert plates to their desired supporting position for said annulus when closed. The improved packer may have both upper and lower insert plates and upper and lower rings and a sleeve within the rings to ensure proper movement of both sets of insert plates.

Abstract: There is disclosed a blowout preventer having rams with cutting edges for shearing a pipe within which carry means for gripping opposite sides of the pipe above the cutting edges of the rams, as the rams move toward one another to shear the pipe, and lifting the upper sheared end of the gripped pipe out of the path of means for sealing between the inner ends of the rams, as the rams continue to move toward one another.

Abstract: A garden hose storage apparatus is particularly adapted for mounting on a substantially vertical surface and includes a side mount. The side mount has a base adapted for attachment to a substantially vertical surface and a cantilever journal is formed integral with the base. An elongated pipe is fixed in the cantilever journal and extends outwardly from the journal. A hose reel is rotatably mounted on the journal and has its axis of rotation substantially coincidental with the longitudinal axis of the pipe. An out tube is releasably connected to the pipe and has a connector adapted for connecting the out tube to a garden hose. A lock releasably connects the reel to the longitudinal pipe to retain the reel on the journal. Release of the lock allows the reel to be removed from the journal.

Abstract: A seating assembly for use in a rotary valve comprising a metallic seat ring having a radially inner metallic sealing section and a polymeric seat ring having a polymeric sealing section for sealing engagement with a valve element, each of said rings having a radially outer retaining section for mounting the respective rings in a valve body, both of said rings having an intermediate spacer section interconnecting the radially inner sealing and radially outer retaining sections. The spacer sections have convoluted runs forming interlocking formations to prevent relative radial movement of the seat rings, and there are a multiplicity of circumferential windings of strands in surrounding relation to the metallic sealing section.

Abstract: A lockout device for a consumer gas supply includes a swivel pipe having an intermediate angulated section having a swivel connector at one end and a threaded connection at the opposite end. The swivel pipe is connected to the gas meter. An expandable plug unit includes a rubber plug with hardened washers abutting the opposite ends. A nut is fixedly attached to one washer and an expanding bolt of a hardened metal extends through washers and plugs with a threaded connection to the nut. The head has a screw driver slot which permits rotating the bolt only to expand the plug. The washers and bolt are formed of a case hardened steel so as to require special shop drill to destroy plug unit for removal and reopening the swivel pipe.

Abstract: A rotating blowout preventor having only one moving part which cooperates with an upper bushing to provide resistance to upthrust and downthrust. The apparatus includes provisions for interaction to occur between the rubber of the stripper and the inside peripheral wall surface of the main body in a manner to provide a radial bearing member which resists lateral movement of a driving member received axially through the rotating stripper rubber. The stripper rubber rotates in low friction relationship respective to the remainder of the rotating blowout preventor. The apparatus includes a minimum of moving parts, and therefore is much easier to manufacture, maintain, and operate.

Abstract: An improvement in ball-type check valve arrangements including a valve body in which is formed a fluid passageway and a valve chamber communicating through a valve seat in the chamber, a ball in the chamber seated in the valve seat, and a reciprocal retaining member having a head engaging the ball in opposition to the valve seat and a stem extending from the head through the chamber wall opposite the valve seat, the ball and retaining member being reciprocably movable toward and away from the seat.

Abstract: A ventilator for a coldroom with pressure responsive valves wherein a first valve plate becomes free from a partition wall so as to open a first valve port when internal pressure is increased, and a second valve plate becomes free from said partition wall so as to open a second valve port when internal pressure is reduced. Electric heaters are disposed at supporting rib portions between said respective valve ports and at outer peripheral portions of said valve ports or in the vicinity of those portions, thereby to heat contact portions of said valve plates with said partition wall. The ventilator can be precisely and susceptively operated in response to changes of internal pressure without fear of malfunction due to freezing.

Abstract: Valve for adjusting the rate of flow of a gaseous fluid, comprising a valve body (1) having a side inlet (2) and an outlet (3), an obturator (10) movable in translation within a housing (4) and bearing on a seat (18) when the outlet (3) is shut off, said housing (4) being fastened within the body (1) by means (5) located externally of the fluid flow path. The mobile obturator (10) has a front part (9) in the form of a hollow cylinder surrounding with limited clearance a nose-piece (7) attached to the housing (4) by rigid arms within the housing (4). The front surface (17) of the nose-piece (7) extended by the front surface (16) of the obturator (10) and the front part (6) of the housing (4) are of an aerodynamic shape. Reduction of the effects of unsteady forces on the obturator across the full range of openings without head losses when fully open.