Abstract:
A control stop for a flush valve for a urinal or toilet fixture includes a housing defining a flow chamber divided by a valve seat into inlet and outlet sections. A valve structure is biased toward the valve seat by a spring applying a valve closing spring force. The housing is sealed by a diaphragm, and the diaphragm covers the movable valve structure, isolating it from water flowing through the housing. The diaphragm does not impede valve structure movement, and the closing spring force establishes a threshold water supply pressure for opening the control stop during increasing pressure following a no or low supply pressure condition. A plurality of control stops may supply a bank of flush valves and fixtures, and open in a cascading sequence during increasing pressure as a result of having springs with different closing spring forces.
Abstract:
Precision metering valves include a body (12) having a fluid inlet port (14), a fluid outlet port (16), a fluid chamber (18) interposed therebetween, and an orifice (38) disposed within the fluid chamber. The orifice has an opening that extends a length along the fluid chamber. A movable element (26) is disposed within the fluid chamber, and includes a stem that is at least partially disposed within the orifice to control the flow of fluid through the valve. The stem and/or the orifice includes an outside surface feature configured to adjust the flow rate of fluid through the valve as a function of stem insertion depth within the orifice. A thin- walled section extends from the stem and extends axially therefrom. The thin- walled section has a sufficient length to facilitate axial stem movement of the stem by rolling transfer. A flange (50) projects from the thin- walled section and extends circumferentially therearound.
Abstract:
Ein Brennstoffeinspritzventil (1), insbesondere ein Einspritzventil für Brennstoffeinspritzanlagen von Brennkraftmaschinen, weist eine Membran (10) auf, welche so um ein abspritzseitiges Ende eines Ventilschließkörper (17) geführt ist, daß ein Eindringen von Brennstoff in einen Aktorraum (11) unterbunden ist.
Abstract:
A valve for sampling a process from a tank or conduit includes an internal cavity (11) in communication with at least one inlet (20) and an outlet (32). A valve actuating rod (130) includes a sealing tip (62) attached to one end thereof. The valve actuating rod (130) is movable to open and close the inlet (20) to the internal cavity (11). Furthermore, a seal (56) is formed on the process side of the bottom wall of the internal cavity (11) in order to ensure that the process material, cleaning material, steam, etc. drains completely out of the internal cavity (11) of the valve.
Abstract:
An apparatus for inoculating a sample to or withdrawing a sample from a vessel or conduit includes a body (3) with an internal collection chamber (24) formed therein. A valve operating rod (37) is movable to open and close an orifice (73) in the collection chamber (74). Furthermore, a drain passage (39) having an opening (73) in communication with the collection chamber (74) is located adjacent to or below the opening of the orifice (73). An inlet passage (25) having an opening in communication with the collection chamber (74) is located above the opening of the drain passage (39). A seal is formed between the movable valve operating rod (37) and the body (3), thereby separating and isolating certain mechanical parts of the valve from certain other process-contact parts of the valve. The seal is formed by one of seal glands, o-rings, flexible diaphragms or other device. Finally, a insulating jacket (33) is provided to insulate the inside chambers (23) of the valve from its surroundings.
Abstract:
An apparatus for inoculating a sample to or withdrawing a sample from a vessel or conduit includes a body (3) with an internal collection chamber (24) formed therein. A valve operating rod (37) is movable to open and close an orifice (73) in the collection chamber (74). Furthermore, a drain passage (39) having an opening (73) in communication with the collection chamber (74) is located adjacent to or below the opening of the orifice (73). An inlet passage (25) having an opening in communication with the collection chamber (74) is located above the opening of the drain passage (39). A seal is formed between the movable valve operating rod (37) and the body (3), thereby separating and isolating certain mechanical parts of the valve from certain other process-contact parts of the valve. The seal is formed by one of seal glands, o-rings, flexible diaphragms or other device. Finally, a insulating jacket (33) is provided to insulate the inside chambers (23) of the valve from its surroundings.
Abstract:
A valve apparatus (20) includes a relatively simple yet effective way to monitor leakage in the valve apparatus (20) in accordance with one embodiment of the invention. The valve apparatus (20) comprises a housing (25) defining a product flow path therethrough. The housing (25) has at least one electrically conductive portion. The valve apparatus (20) also comprises a valve assembly (30) for controlling the flow of a product through the product flow path. The valve assembly (30) has at least one electrically conductive component that is electrically insulated (45) from at least one electrically conductive portion (45) of the valve assembly (30) during normal operation of the valve apparatus (30). A hygienic sealing member (40) is provided that is disposed between the housing (25) and the valve assembly (30). A continuity monitoring circuit (155) is provided for monitoring the status of the electrical conduction between the at least one conductive portion (45) of the housing (25) and the at least one electrically conductive portion (45) of the valve assembly (30).
Abstract:
A high purity valve (10) includes a valve body (12) having an inlet (40) and an outlet (42) separated by a valve seat (32), and a diaphragm (22) having a central stem (23) that has a first end coupled to a piston (20) for actuating the valve, and a poppet (28) for engaging the valve seat to close the valve. The poppet forms a dual point seal (50/52, 50'/52') with the valve seat having at least two points of contact between an annular surface (30) of the poppet and the valve seat. The annular surface of the poppet may be either a concave surface or a convex surface that provides the dual point seal. The valve has a retainer (14) adjacent the diaphragm, and the diaphragm has a flexible web (26) that extends radially outward from the central stem. The retainer has a surface (60) adjacent the web, and the surface is spaced apart from the web such that the web does not contact the surface when the valve is pressurized.