A valve with a body having a through bore for fluid passage. The body has a plurality of passages transverse to the through bore. At least two of the transverse passages each have a gate disposed therein configured for motion along the passage between a position to permit fluid flow along the through bore and a position to restrict fluid flow along the through bore. Each gate is configured for motion along the transverse passage in one direction in response to a first force acting on the gate and in another direction in response to a second force acting on the gate.

A gas turbine engine valve assembly having an oil shut-off valve and a compensating valve fluidly connected thereto. The compensating valve, in a first position, restricts access to a pressure-reducing oil flow path leading to an oil reservoir, and in a second position, provides access to the pressure-reducing oil flow path. The pressure-reducing oil flow path is defined by fluid flow between housing apertures, a laminar hole and an orifice. The valve assembly is operable between a first configuration, wherein the oil shut-off valve is in a fluid transfer position and a piston of the compensating valve is in a closed position to direct oil toward the engine component, and a second configuration, wherein the oil shut-off valve is in the shut-off position and the piston is in a open position to direct oil toward the oil reservoir via the pressure-reducing oil flow path.

A damping valve includes a valve body has at least one through-flow channel for each flow direction of a damping medium through the valve body. Each through-flow channel connects an inlet to an outlet. a valve disk covers the through-flow channels at the outlet opening the valve disk has a first volume flow of the damping medium through the valve body, at least one pre-orifice in the valve disk and at least one pre-orifice throttle arrangement is arranged at least indirectly adjoining the valve disk and adapted to at least partially cover or open the pre-orifice depending on the flow direction of a damping medium. The pre-orifice throttle arrangement includes multiple structural component parts arranged coaxial to one another, at least two of the structural component parts are inseparably connected to one another.

Embodiments of gate valves and methods for using same are provided herein. In some embodiments, a gate valve for processing a continuous substrate includes: a body; a plurality of seals disposed within the body and configured to move between a closed position and an open position; a plurality of volumes disposed between adjacent ones of the plurality of seals and defined by the plurality of seals and the body; a gas inlet disposed through a first side of the body and fluidly coupled to an innermost one of the plurality of volumes; and a gas outlet disposed through a second side of the body opposite the first side and fluidly coupled to other ones of the plurality of volumes disposed on either side of the innermost one of the plurality of volumes.

An adjustment device includes a body, an adjustment inner gear ring, and an adjustment shaft. The body has a cavity therein, has a first end provided with a first hole and a second hole, and has a peripheral wall provided with a third hole. The first hole, the second hole, and the third hole are connected with the cavity. The adjustment inner gear ring is fitted in the cavity, and has a peripheral wall provided with adjustment holes. The adjustment holes have different cross-sectional areas. A second end of the adjustment shaft has an adjustment gear and passes through the second hole into the cavity. The adjustment gear meshes with the adjustment inner gear ring. The adjustment shaft is rotatable to drive rotation of the adjustment inner gear ring so as to enable the third hole to be connected with the cavity through one of the adjustment holes.

A plant or refinery may include equipment such as condensers, regenerators, distillation columns, pumps, slide valves, or the like. Different operating methods may impact deterioration in equipment condition, thereby prolonging equipment life, extending production operating time, or providing other benefits. Mechanical or digital sensors may be used for monitoring equipment to determine whether problems are developing. Specifically, sensors may be used in conjunction with one or more system components to predict and detect slide valve sticking. A shielded, tube skin thermocouple assembly may provide a temperature profile for a slide valve. Tomography may be used to image a slide valve. An operating condition of the plant or refinery may be adjusted to prolong equipment life or avoid equipment failure.

The invention relates to a port plate 10, 11 that is used as a valve plate or a bearing plate. The port plate 10, 11 comprises a fluid blocking surface section 15 and a fluid passage surface section 13, 14 that is arranged within said at least one fluid blocking surface section 15. Structural reinforcement elements 12, 19 are arranged within the fluid passage orifice of the fluid passage surface section 13, 14.

Disclosed is a valve mechanical linkage system. A valve comprises a main valve and a secondary valve; the system comprises a first transmission mechanism and a second transmission mechanism; the first transmission mechanism is connected with the main valve and used for converting the up-and-down reciprocating motion of the main valve into a rotational reciprocating motion; the first transmission mechanism and the second transmission mechanism are connected by means of a coupling (4), and the rotational force of the rotational reciprocating motion is transferred to the second transmission mechanism by means of the coupling (4); the second transmission mechanism is connected with the secondary valve, and achieves on-off control on the secondary valve by converting the rotational reciprocating motion into the up-and-down reciprocating motion.

Vacuum valve having a valve housing with first and second valve openings, and a closure unit having first and second plates, a roller support arranged between the plates, multiple roller pairs, each formed from first and second spreading rollers, and a spring. The plates are carried together with the roller support when it moves parallel to a movement direction from the open position into an intermediate position, and an additional movement of the plates in the movement direction is blocked when the roller support moves from the intermediate position into a closed position, during which the spreading rollers move along rising flanks of recesses, and the plates are thus spread apart. Rotational axes of the spreading rollers of each roller pair are offset relative to each other and are spaced apart in the spreading direction by a distance smaller than a sum of the radiuses of the spreading rollers.

A sectional control device (12) controls the flow of particulate material from a meter (28) assembly to a primary manifold (24) of an air seeding system. The sectional control device (12) includes a plate assembly (56) having particulate openings (36A, 36C, 36) extending between the meter (28) assembly and the primary manifold (24) and a shut-off mechanism configured to control the flow of the particulate material through the particulate openings (36A, 36C, 36). The shut-off mechanism includes a gate (44A, 44) configured to slide between an open position, where particulate material can flow through the particulate opening (36, 38), and a closed position, where particulate material is prevented from flowing through the particulate opening (36, 38). The shut-off mechanism also includes an actuator (40A, 40) configured to drive the gate (44A, 44) between the open position and the closed position. A sectional control device (12) controls the flow of particulate material from a meter (28) assembly to a primary manifold (24) of an air seeding system. The sectional control device (12) includes a plate assembly (56) having particulate openings (36A, 36C, 36) extending between the meter (28) assembly and the primary manifold (24) and a shut-off mechanism configured to control the flow of the particulate material through the particulate openings (36A, 36C, 36). The shut-off mechanism includes a gate (44A, 44) configured to slide between an open position, where particulate material can flow through the particulate opening (36, 38), and a closed position, where particulate material is prevented from flowing through the particulate opening (36, 38). The shut-off mechanism also includes an actuator (40A, 40) configured to drive the gate (44A, 44) between the open position and the closed position.