A pressurization and evacuation system is provided, including a top 3-way valve including a first port, a second port and a third port, a bottom 3-way valve including an first port, a second outlet port and a third port, and an educator including a pressure inlet, a suction inlet, and a discharge outlet. Wherein: a first conduit fluidically connects the top 3-way valve third port with the educator pressure inlet; a second conduit fluidically connects the top 3-way valve second port with the bottom 3-way valve first port; a third conduit fluidically connects the bottom 3-way valve third port with the educator suction inlet; and a fourth conduit fluidically connects the bottom 3-way valve second port with a customer apparatus.

A valve includes a lower valve housing, a diaphragm, and an upper valve housing. A top surface of a piezoelectric pump is bonded to a bottom surface of the lower valve housing. A circular hole portion is provided in a central portion of a region of the diaphragm that opposes a projecting portion of the lower valve housing. The diaphragm is bonded to the upper valve housing and the lower valve housing, and a divided interior of a valve housing configures a first lower valve chamber, a second lower valve chamber, a first upper valve chamber, and a second upper valve chamber. A groove is located in a wall portion of the upper valve housing that opposes the diaphragm in the first upper valve chamber.

A fluid routing plug for use with a fluid end section. The fluid end section being one of a plurality of fluid end sections making up a fluid end side of a high pressure pump. The fluid routing plug is installed within a horizontal bore formed in a fluid end section and is configured to route fluid throughout the fluid end section.

A fluid end assembly having a plurality of fluid end sections positioned in a side-by-side relationship. Each fluid end section has a housing made of multiple-piece construction. One or more pieces of the housing are configured to have a plurality of stay rods attached thereto. The stay rods interconnect the fluid end assembly and a power end assembly.

A valve with a shuttle for use in a flow management system is capable of bypassing a backflow.

[Object] An electric valve control device capable of preventing a start delay of an electric valve control (an opening degree control) by shortening a waiting period of a system control device and an electric valve device including the same are provided.

[Solving Means] An electric valve control device 11 outputs a signal indicating an end or an interruption of an initialization operation to an air conditioner ECU 16 after the initialization operation of the electric valve 9 ends or is interrupted.

A pressure reducing valve and a pressure reducing system are provided. The pressure reducing valve includes a main valve body in which a valve chamber is formed; the main valve body is provided with a valve outlet and a valve inlet communicating with the valve chamber; and at least two pressure reducing devices adapted between the valve inlet and the valve outlet to depressurize the fluid at the valve inlet and discharge to the valve outlet. The pressure reducing valve occupies a small space, low cost and low pressure leakage point. Each pressure reducing device shares a main valve body, independent of each other, do not interfere with each other, and can be flexible to switch or use at the same time. The pressure reducing system is provided with at least one regulating member, which comprising an adjustment medium outlet section which communicates with the valve chamber through the valve body and the valve seat. Through the regulating member to reduce erosion and wear caused by the cavitation effect, and adjust the fluid flow flexibly.

The invention relates to a sanitary change-over valve (1) having a valve housing (2) which has one valve inlet (3) and two selectively actuatable valve outlets (4, 5), having a valve piston (6) which is movable from a first switch-over position in which the fluid is guided by way of a flow path that is routed through a first valve outlet (4) to a second switch-over position in which the fluid is guided by way of a flow path that is routed by way of a second valve outlet (5) as soon as that portion of the second flow path that is routed beyond the change-over valve (1) has been released, wherein the valve piston (6) is configured as a hollow body through which the fluid in the course of at least one of the flow paths is routed by way of at least one piston inlet (9) that is disposed on the piston circumference. The change-over valve according to the invention is characterized in that the fluid that is routed by way of the at least one piston inlet (9) in the course of the second flow path is routed by way of a first piston outlet that is provided on that piston end side that faces away from the piston base (10), and in that a flow throttle (12), a flow regulator (11), or a return flow preventer is provided in the first piston outlet (cf. FIG. 1).

A valve device, in particular a double stop-check valve, preferably of the two-way valve type, has at least three fluid connections (1, 2, 3) provided in a valve housing (51). Two valve elements (65, 67) can slide in the valve housing (51). One control device (71) controls the valve elements (65, 67). At least one of the valve elements (65, 67) forms, together with parts (59/61) of the valve housing (51), a seat leak-tight closure part for the associated fluid connections (1, 2, 3).

A valve comprising a valve body including an inlet, an outlet and a mounting surface. A first valve actuator is connected to the valve body. A plurality of mounting holes are formed in the mounting surface. The plurality of mounting holes are asymmetric relative to the mounting surface.