A control valve includes a piston-housing having a hollow portion. The hollow portion has a first end, an open end, first and second internal chambers, and a fluid port configured to allow fluid to exit the second chamber. The first chamber is nearer the first end, and the second chamber is nearer the open end. A piston is located within the housing and is adapted for reciprocal motion. The piston includes a first and second seal-engaging portions. The first seal-engaging portion has a diameter that is less than the diameter of the second seal-engaging portion.

A selector valve assembly for use in conjunction with an eductor dispensing system which reduces the incidence of product carry-over when the valve is moved from one position to another. The selector valve assembly also reduces the incidence of improper dispensing. In a preferred manner, the selector valve assembly has a single valve member and accommodates four product inlet lines for selectively passing chemical concentrate to two eductors. The selector valve assembly is composed of a minimum of ports, thereby reducing maintenance and cost.

A relief valve includes a first chamber with an inlet that includes an inlet valve seat and an outlet. A second chamber is spaced apart from the first chamber. A chamber wall is positioned between the first chamber and the second chamber. A closure member is movably positioned within the first chamber and is configured to be closable on the inlet valve seat. A first magnet is coupled to the closure member. The first magnet is movably positioned within the second chamber and is configured to generate a first magnetic field of a first polarity. A second magnet is positioned within the second chamber and is configured to generate a second magnetic field of a second polarity. The first magnetic field and the second magnet field interact to bias the closure member to rest on the inlet valve seat with a set force.

A check valve unit 1 includes: a container body 2 including a valve body housing portion 21, a valve seat 22, and a protruding portion 23, the valve body housing portion 21 having a cylindrical shape, the valve seat 22 being formed at one end portion of the valve body housing portion 21 and protruding from an inner peripheral surface of the valve body housing portion 21, the protruding portion 23 being formed at the other end portion of the valve body housing portion 21 and protruding from the inner peripheral surface of the valve body housing portion 21; and a valve body 3 including a valve portion 31 and a guide portion 32 and disposed in the container body 2, the valve portion 31 coming into contact with the valve seat 22 at a time of preventing backflow of refrigerant, the guide portion 32 including a plurality of blades.

Venturi devices for producing vacuum are disclosed that include a housing defining a motive port, a suction port, a discharge port, a first flow passage between the motive port and the discharge port, and a second flow passage into and through the suction port and into fluid communication with the first flow passage, a first check valve incorporated into the housing and positioned to control fluid flow through the suction port, and a sound attenuating wrap about the outer surface of the housing. The Venturi devices may also include a sound attenuating member disposed in the first flow passage downstream of the intersection of the second flow passage and the first flow passage, in the portion of the second flow passage leading into the suction port, in the first check valve, or combinations thereof.

The valve device includes a main member for installing on a toy gun and connecting to a high-pressure gas source. Inside the main member, there is a first chamber, a second chamber connected to the first chamber, and an inlet channel. A valve member is movably housed in the main member. The valve member includes a valve channel, a through hole, an inlet blocking element, and an outlet blocking element. The valve member selectively blocks the connection between the first chamber and the inlet channel. As such, the pressure difference between the second chamber and the high-pressure gas source drives the valve member to selectively block the inlet channel, without using a spring to control the valve member. The valve device therefore has enhanced operation life and reduced cost.

The valve device includes a main member for installing on a toy gun and connecting to a high-pressure gas source. Inside the main member, there is a first chamber, a second chamber connected to the first chamber, and an inlet channel. A valve member is movably housed in the main member. The valve member includes a valve channel, a through hole, an inlet blocking element, and an outlet blocking element. The valve member selectively blocks the connection between the first chamber and the inlet channel. As such, the pressure difference between the second chamber and the high-pressure gas source drives the valve member to selectively block the inlet channel, without using a spring to control the valve member. The valve device therefore has enhanced operation life and reduced cost.

A check valve includes a container body and a valve body. The container body includes a cylindrical valve-body housing portion, an inlet portion, an outlet portion, and a valve seat. The inlet portion is formed at one end portion of the valve-body housing portion, and the outlet portion is formed at the other end portion of the valve-body hosing portion. The valve seat is protruded at an inner circumferential surface of the valve-body housing portion. The valve body is provided in the container body and movable in the axial direction thereof.

An oil separating module for an internal combustion engine, including: an oil separator, an oil return arranged such that separated oil can flow through the oil return to an oil sump, a mounting, and a non-return valve having: a valve housing having a throughbore with a first end opening and a second end opening, and a valve body movably mounted in the valve housing such that the valve body transitions between an open position and a closed position. When the first end opening is above the second end opening, the valve body automatically transitions to, or remains in, the closed position when a second end opening pressure is greater than a first end opening pressure by at least a threshold pressure difference, and the valve body automatically transitions to, or remains in, the open position when the second pressure is not greater than the first pressure by at least the threshold pressure difference.

In some embodiments, an apparatus includes a housing and a purge valve. The housing defines a cavity and a lumen extending from a volume of the cavity to a volume outside the cavity. The purge valve is disposed within the lumen and includes an occlusion member. A portion of the occlusion member has a width substantially equal to a width of an end portion of the lumen such that the portion of the occlusion member is disposed within the end portion of the lumen when the purge valve is in a first configuration. The portion of the occlusion member being disposed outside the end portion of the lumen when the purge valve is in a second configuration.