Abstract: A bypass valve comprising a valve body, a valve member, and a valve seat. The valve body has a first end, a second end, a central axis therebetween, an inlet formed through the first end, a valve channel, and an outlet channel extending from the valve channel to an outer surface of the valve body. The valve channel has a first end in fluid communication with the inlet, a second end terminating within the valve body, and a central channel axis therebetween which is axially aligned with the central axis. The valve member is substantially-spherical and movably disposed within the valve channel. The valve seat is disposed adjacent the first end of the valve channel. The valve seat has an orifice defined therethrough. The valve member is movable between a first position, engaging the valve seat to substantially seal the orifice, and a second position adjacent the second end of the valve channel to permit fluid to flow through the orifice.

Abstract: A coaxial valve (10) has a valve housing (11) with an inlet port (12) and an outlet port (14) for a medium (15) flowing through the coaxial valve. A control tube is movable in its longitudinal direction in the valve housing (11) and interacts with the inlet port (12) and the outlet port (14) such that with the valve (10) opened medium (15) flows through the control tube. A valve seat within said valve housing has a valve seat face, the control tube interacting with the valve seat face in one of its axial end positions for closing the coaxial valve (10). The valve seat face is formed on a replaceable sealing element (22) which is arranged in an opening (19) of the valve housing (11), said opening (19), running essentially transversely with respect to the longitudinal direction.

Abstract: The check valve (12, 14) of the present invention is a ball-type valve that incorporates multiple annular valve seats (34, 38) of progressively smaller diameters for the specific purpose of providing a series of effective annular valve seats as the larger annular valve seats progressively deteriorate, and as the ball valve elements (24) wear away (decrease in diameter) from use, for example, as abrasive slurry is pumped through the check valves and through the fluid pump. Each of the annular valve seats (34, 38) comprises a flexible or otherwise deformable annular lip defined by a cylindrical section having an annular groove (36, 40) formed therein slightly outboard of the cylindrical section, such that the cylindrical section may deform slightly outwardly into the annular groove, thereby effecting an improved functional sealing engagement with the ball valve element (24) as the tip of the cylindrical section deforms outwardly into the annular groove.

Abstract: The check valve (12, 14) of the present invention is a ball-type valve that incorporates multiple annular valve seats (34, 38) of progressively smaller diameters for the specific purpose of providing a series of effective annular valve seats as the larger annular valve seats progressively deteriorate, and as the ball valve elements (24) wear away (decrease in diameter) from use, for example, as abrasive slurry is pumped through the check valves and through the fluid pump. Each of the annular valve seats (34, 38) comprises a flexible or otherwise deformable annular lip defined by a cylindrical section having an annular groove (36, 40) formed therein slightly outboard of the cylindrical section, such that the cylindrical section may deform slightly outwardly into the annular groove, thereby effecting an improved functional sealing engagement with the ball valve element (24) as the tip of the cylindrical section deforms outwardly into the annular groove.

Abstract: Valves are disclosed including a housing having at least one fluid inlet and at least one fluid outlet, a valve seat for at least one of the fluid inlets and fluid outlets, a diaphragm movable between a first position engaged with the valve seat and a second position disengaged from the valve seat, the diaphragm having a surface area which is greater than the size of the valve seat so that the surface area of the diaphragm is greater than the surface area necessary for abutment against the valve seat, an actuator for actuating the diaphragm between the first and second positions, and an activator for displacing the diaphragm whereby at least partially portions of the surface area of the diaphragm are exposed to the valve seat upon displacement of the diaphragm.