A valve with an internal member is disclosed which allows exhaled carbon dioxide to escape from a breathing circuit when the circuit gas pressure drops below a threshold pressure. The valve operates by occluding one or more ports under a relatively high pressure and opening the one or more ports under a relatively low pressure. The internal member is attached to the body of the valve at two or more locations on the internal member. The internal member moves in a direction perpendicular to the gas flow through the valve.

A valve unit for a piston compressor includes a housing, in which at least one inlet valve and at least one outlet valve are arranged. The housing includes a first cylinder-head-side surface and a second, cylinder-side surface which is away from the first cylinder-head-side surface. The surfaces extending transversely to a longitudinal axis of the valve unit. A peripheral wall of the housing of the valve unit, and which surrounds the longitudinal axis of the valve unit, includes at least one contact section. The at least one contact section is provided for contact on a contact surface on the cylinder or on the cylinder head and extends obliquely to the longitudinal axis.

A medical fluid pumping system includes a medical fluid pump for pumping a process fluid, the medical fluid pump including a first pump chamber, a first inlet valve chamber including a first inlet valve diaphragm, a first outlet valve chamber, a second pump chamber, a second inlet valve chamber including a second inlet valve diaphragm, and a second outlet valve chamber; and a medical fluid chassis operable with the medical fluid pump, the medical fluid chassis including a motive fluid source providing motive fluid at a motive fluid pressure, and wherein the first and second inlet valve diaphragms are configured to actuate from an open to a closed position at a pressure less than the motive fluid pressure to mitigate process fluid backflow through the first and second inlet valves.

A valve with an internal member is disclosed which allows exhaled carbon dioxide to escape from a breathing circuit when the circuit gas pressure drops below a threshold pressure. The valve operates by occluding one or more ports under a relatively high pressure and opening the one or more ports under a relatively low pressure. The internal member is attached to the body of the valve at two or more locations on the internal member. The internal member moves in a direction perpendicular to the gas flow through the valve.

A blood treatment system includes (i) a blood pump including a first blood pump chamber operable with a first inlet valve and a first outlet valve, and a second blood pump chamber operable with a second inlet valve and a second outlet valve; (ii) an arterial blood line; (iii) a dialyzer placed in fluid communication with the arterial blood line, wherein the blood pump is provided along the arterial blood line upstream of the dialyzer; and (iv) a venous blood line extending downstream from the dialyzer. The system also includes a processor configured to sequence the first and second blood pump chambers so as to achieve a pulsatile pattern of filling the first and second blood pump chambers and an at least substantially constant pattern of discharging blood from the first and second blood pump chambers to the dialyzer.

A reed valve module includes a module body and a reed petal. The module body includes a seating surface located on a first side of the module body and a sealing face located on a second side the module body. The reed petal is positioned adjacent to the second side of the module body and adapted to seal against the sealing face when the reed petal is in a closed position, wherein the reed valve module is a self-contained modular unit that is adapted to be inserted into a receiving cavity of a modular reed valve assembly such that the seating surface is positioned adjacent to a retaining surface of the modular reed valve assembly and an interfacing surface of the reed valve module is positioned adjacent to a second retaining surface of the modular reed valve assembly, and wherein the reed valve module is adapted to be captured and retained within the modular reed valve assembly between the first and second retaining surfaces.

A valve with an internal member is disclosed which allows exhaled carbon dioxide to escape from a breathing circuit when the circuit gas pressure drops below a threshold pressure. The valve operates by occluding one or more ports under a relatively high pressure and opening the one or more ports under a relatively low pressure. The internal member is attached to the body of the valve at two or more locations on the internal member. The internal member moves in a direction perpendicular to the gas flow through the valve.

A valve with an internal member is disclosed which allows exhaled carbon dioxide to escape from a breathing circuit when the circuit gas pressure drops below a threshold pressure. The valve operates by occluding one or more ports under a relatively high pressure and opening the one or more ports under a relatively low pressure. The internal member is attached to the body of the valve at two or more locations on the internal member. The internal member moves in a direction perpendicular to the gas flow through the valve.

A fluid circulation assembly for a dishwasher appliance includes a pump, a diverter, and a valve. The diverter includes an inlet and a plurality of outlet ports. The inlet of the diverter is in fluid communication with the pump for receiving fluid from the pump. The valve is in fluid communication with the diverter via one or more of the plurality of outlet ports. The valve includes a housing, a dual check valve assembly mounted in the housing and a plurality of conduits. The dual check valve assembly selectively directs fluid from the diverter to one or more of the plurality of conduits.

A valve closure for a piston compressor valve including: a valve seat having a plurality of passage openings, a shaft having an axis of rotation (D), and a rotatable closing element connected to the shaft for opening and closing the passage openings, the valve seat having a flat end face, to which the passage openings lead and a center (Z): the passage openings extending radially to the center (Z); and the closing element having a center point (M) and a plurality of closing arms extending radially to the center point (M). The shaft can be rotated about the axis of rotation and can be slid in the extension direction of the axis of rotation extending perpendicularly to the end face and through the center (Z); each closing arm having a sealing surface substantially complementary to the passage openings in accordance with the rotation of the closing element.