A valve component utilized in a fluid end assembly of a reciprocating pump may contain a multi-piece construction. The valve component may include a valve body portion, a leg assembly portion, a sealing element, and an insert at least partially captured between the valve body portion and the leg assembly portion. The insert may be constructed from a carbide or a ceramic material, and, when the valve component is fully assembled, may be compressed between the valve body portion and the leg assembly portion. The insert may at least partially form the strike surface of the valve component. The valve body portion and the leg assembly portion may both be constructed from a metallic material, and the valve body portion may define a sealing seat. The sealing element may be constructed from an elastomeric material that may be pre-formed and then compression molded onto the seat of the valve body.

One or more techniques and/or systems are disclosed for a flap valve in a diaphragm pump. The flap valve includes a body and a self-centering hinge portion. A front portion of the body includes a front surface having a raised portion and a recessed portion. The front surface is configured to form a seal with a surface of the pump when the body is in a closed position, the surface of the pump being at an inlet or an outlet of a pumping chamber. The body is configured to allow a downstream flow of a fluid when the flap valve is in an open position. The self-centering hinge portion is operably connected to the body. The self-centering hinge portion has a dynamically changing longitudinal axis. The body is configured to simultaneously translate and rotate about the dynamically changing longitudinal axis to form the seal.

A filtration and purification processing method includes following steps: (1) providing a filtration and purification device; (2) performing a gas introduction, filtration, and detection procedure; (3) performing a detection and determination procedure to the purified gas; (4) performing a circulating filtration and detection procedure to the purified gas; and (5) repeating filtration and purification procedures to the purified gas several times and guiding out the purified gas.

Devices for sealing and inflating inflatable objects, in particular for sealing and inflating motor vehicle tires, wherein the devices have as a source of compressed gas a compressor unit, which is formed as a reciprocating piston compressor driven by a slider crank mechanism and has a piston moved in an oscillating manner in a cylinder, and wherein the piston and the cylinder delimit a compression chamber and the cylinder is closed on the output side by a cylinder head with an outlet valve.

A portable inflation device of the present application includes an inflation pump body, an upper casing, a middle casing, a lower casing, a resilient component, and a resilient ventilation plug. The upper casing and the middle casing respectively seal two ends of the inflation pump body, and an air chamber is defined thereamong. An accommodating chamber is defined between the middle casing and the lower casing disposed outside the air chamber. An intake hole, a first ventilation hole and an exhaustion hole are respectively formed on the upper casing, the middle casing and the lower casing. The resilient ventilation plug disposed inside the accommodating chamber includes a perforated foam positioned between the first ventilation hole and the exhaustion hole and an sealing layer covering a surface of the perforated foam facing towards the first ventilation hole. The inflation device is small in volume, collapsible, portable, and easy to operate.

A valve component utilized in a fluid end assembly of a reciprocating pump may contain a multi-piece construction. The valve component may include a valve body portion, a leg assembly portion, a sealing element, and an insert at least partially captured between the valve body portion and the leg assembly portion. The insert may be constructed from a carbide or a ceramic material, and, when the valve component is fully assembled, may be compressed between the valve body portion and the leg assembly portion. The insert may at least partially form the strike surface of the valve component. The valve body portion and the leg assembly portion may both be constructed from a metallic material, and the valve body portion may define a sealing seat. The sealing element may be constructed from an elastomeric material that may be pre-formed and then compression molded onto the seat of the valve body.

A device for choking a fluid flow includes a pot-like base body, in the base of which a first passage opening is arranged, and a closing body guided axially moveably in the pot-like base body against a spring force of a spring element and having a second passage opening that forms a static choke point with a predefined fixed opening cross section. The closing body in combination with the spring element and the first passage opening forms a dynamic choke point with a dynamic opening cross section that is variably adjustable depending on a pressure difference.

Disclosed are techniques such as roll to roll processing to produce inlet valves for controlling entry of fluid into a compartment of a device. The valve includes a body having a compartment and an inlet into the compartment, with the inlet being bifurcated by a pair of spaced wall portions of the body that form a confining region and which pair of spaced wall portions together with wall portions of the body provide a pair of spaced inlet portions into the compartment and a valve member having a first portion that is position-able within a portion of the compartment, an intermediate portion, and a second portion coupled to the first portion by the intermediate portion, with the second portion position-able within the confining region and with the second portion having an obstruction portion.

A fluid end is formed from a first body attached to a separate second body. Each body includes an external surface. When the bodies are attached, their respective external surfaces are in flush engagement. A plurality of bores are formed in the second body that are alignable with a plurality of corresponding bores formed in the first body. The fluid end may be used with seals disposed within recesses within each bore to seal against corresponding sealing surfaces. Further, retaining closures may be bolted to the fluid end bodies, such that the closures have a threadless connection to the fluid end bodies. Various combinations of such components may be utilized.

A valve for use in a fluid end. The valve has a solid body with a sealing surface. The valve may move into a position wherein the valve when contacts a valve seat. When in contact, the sealing surfaces prevent flow of fluid through the valve. The sealing surface has three regions. The outer region has an elastomeric seal insert disposed on the surface. The inner region has a shock absorbing insert disposed on the surface. Intermediate these inserts is a metallic surface for metal-to-metal sealing with the valve seat.