The present disclosure discloses a multi-component valve system for use in pumps such as fracking pumps for use in subterranean resource production. The assembly includes a retaining pin having a retaining cap on its upper end. Located on the retaining pin are an insert retainer, an insert beneath the insert retainer, a valve beneath the insert, and a guide beneath the valve. The guide has a generally truncated pyramid shape, and a central portion on its upper end. The central portion is centered on the retaining pin. The retaining pin has an expanded lower end to secure the valve assembly together.

The present disclosure relates to an improved pilot valve assembly for a hydrant pit valve. The pilot valve assembly includes a poppet that is movable between an open position and a closed position. The poppet has a molded seal with an interlock feature to hold the seal rigidly. The pilot valve assembly also includes a manually reset mechanism. The reset mechanism can be horizontally positioned and can function to reset the pilot actuator for the next refueling operation. A lanyard can be connected to the poppet to be used a deactuation mechanism.

To avoid formation of surface sag formed when an internal flow path of a valve element is processed and to ensure a maximum flow rate in a fluid control valve where a seating surface of the valve element is formed of a resin layer, in a fluid control valve that includes a valve seat, and a valve element including resin layers provided in concave grooves formed on a facing surface facing the valve seat, the valve element further includes internal flow paths whose inflow ports are opened in a back surface facing away from the facing surface and whose outflow ports are opened in portions around the concave grooves on the facing surface, and counterbored portions are formed on sides of the inflow ports of the internal flow paths.

A corrosion-resistant ball valve (15) comprising a housing (1; 2), in which a spherical sealing member (3) provided with a passage duct is rotatably arranged and an operating spindle (4) which is detachably coupled to the sealing member (3), in which the sealing member (3) is provided with an uninterrupted corrosion-resistant coating layer (16a), in which said coating layer comprises a tubular part (16b) which surrounds at least a part of the operating spindle (4) and a method for producing such a ball valve (15).

A blast gate for a vacuum system includes a chassis connectable to a duct and defining a flow passage therethrough, and a gate connected to the chassis and rotatable about a central axis. The gate includes a first portion, an intermediate portion and a second portion spaced apart circumferentially about the central axis. The first portion defines a flow aperture, the intermediate portion defines an auxiliary flow aperture, and the second portion includes a partition. Each of the first portion, second portion and third portion is selectively rotatable into fluid alignment with the flow passage. The blast gate further includes a motor connected to the gate and selectively operable to rotate the gate about the central axis.

An apparatus to allow or stop an air flow into an enclosed environment or piping system comprises (a) a housing, (b) a first valve seat, (c) a first sealing member, (d) a second valve seat, (e) a second sealing member, (f) at least one locking mechanism configured to limit a movement of the first sealing member and/or the second sealing member; wherein the first sealing member moves away from the first valve seat when the second pressure is greater than the first pressure in a predetermined pressure difference; wherein the second sealing member moves away from the first valve seat when the third pressure is greater than the second pressure in a predetermined pressure difference; wherein the first pressure communicates with a system pressure in the piping system; and wherein the third pressure communicates with an ambient air pressure.

An apparatus to allow or stop an air flow into an enclosed environment or piping system comprises (a) a housing, (b) a first valve seat, (c) a first sealing member, (d) a second valve seat, (e) a second sealing member, (f) at least one locking mechanism configured to limit a movement of the first sealing member and/or the second sealing member; wherein the first sealing member moves away from the first valve seat when the second pressure is greater than the first pressure in a predetermined pressure difference; wherein the second sealing member moves away from the first valve seat when the third pressure is greater than the second pressure in a predetermined pressure difference; wherein the first pressure communicates with a system pressure in the piping system; and wherein the third pressure communicates with an ambient air pressure.

A valve includes a valve body with an annular valve seat having a first central axis, and a valve closure subassembly assembled with the valve body and including an axially movable valve stem and a stem tip attached to the valve stem by a stem connector and including an annular seal portion having a second central axis. When the first central axis is misaligned with the second central axis, the stem tip is pivotable about the valve stem to effect angular adjustment of the annular seal portion of the stem tip into uniform sealing engagement with the annular valve seat when a closing force is applied to the valve stem. The stem connector is configured to resist pivoting movement of the stem tip when the valve stem is in the open position.

A resilient seal includes an annular body portion and a seating surface defined by the annular body portion and configured to interface with a seat of a subsurface safety valve. The resilient seal further includes a plurality of sealing surfaces defined by the annular body portion. Each sealing surface of the plurality of sealing surfaces is positioned to interface with a flapper of the subsurface safety valve in a closed position of the flapper of the subsurface safety valve. Additionally, the resilient seal includes at least one annular channel defined by the annular body portion between adjacent sealing surfaces of the plurality of sealing surfaces.

A resilient seal includes an annular body portion and a seating surface defined by the annular body portion and configured to interface with a seat of a subsurface safety valve. The resilient seal further includes a plurality of sealing surfaces defined by the annular body portion. Each sealing surface of the plurality of sealing surfaces is positioned to interface with a flapper of the subsurface safety valve in a closed position of the flapper of the subsurface safety valve. Additionally, the resilient seal includes at least one annular channel defined by the annular body portion between adjacent sealing surfaces of the plurality of sealing surfaces.