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 between an intake and discharge bore. The fluid routing plug comprises a plurality of first and second fluid passages. The first and second passages do not intersect and are offset from one another. The first fluid passages are configured to direct fluid delivered to the horizontal bore from intake bores towards a reciprocating plunger. The second fluid passages are configured to direct fluid pressurized by the plunger towards a discharge bore.

A pump includes a liquid housing having a liquid chamber with a piston/diaphragm assembly arranged therein that responds to a suction stroke and draws liquid into the liquid chamber, and responds to a pressure stroke and provides liquid from the liquid chamber; and a gas housing having a slide valve assembly separating first and second gas chambers. The slide valve assembly responds to a suction-to-pressure-force at the suction stroke conclusion, changes from a suction-to-pressure stroke state, provides gas from the first to second gas chamber through the slide valve assembly, and provides the pressure stroke so liquid passes from the liquid chamber; and responds to a pressure-to-suction-force at the pressure stroke conclusion, changes from the pressure-to-suction stroke state, provides gas from the second chamber through the slide valve assembly, and provides the suction stroke so liquid is drawn into the liquid chamber.

A manually operated pump exhibiting numerous improvement over existing such pumps is described. The pump can include a cylinder that is removeably mounted to a molded valve box of unitary construction. The valve box can feature a valve plate covering a valve chamber and housing an inlet valve and an outlet valve. In some instances, the pump includes a molded piston of unitary construction to which a pair of opposing piston cups is mounted. In some cases, the pump includes a filler cap forming an inlet adapted to deliver a priming fluid into the cylinder. In some cases, the pump includes a stopper cap adapted to prevent a pump shaft from being fully pulled out of the cylinder.

A pressure adjustment apparatus including a pump, a selector valve coupled to the pump, and a chamber in selective fluid communication with the pump through the selector valve is disclosed. The pump includes a pump body that defines a variable volume therein, the pump body further defining a first aperture and a second aperture therethrough. The selector valve includes a first check valve disposed in a first fluid channel of a plurality of fluid channels, the first check valve being oriented to permit flow through the first fluid channel only in a first flow direction, the first flow direction being a flow direction out of the variable volume, and a second check valve disposed in a second fluid channel of the plurality of fluid channels, the second check valve being oriented to permit flow through the second fluid channel only in a second flow direction.

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 between an intake and discharge bore. The fluid routing plug comprises a plurality of first and second fluid passages. The first and second passages do not intersect and are offset from one another. The first fluid passages are configured to direct fluid delivered to the horizontal bore from intake bores towards a reciprocating plunger. The second fluid passages are configured to direct fluid pressurized by the plunger towards a discharge bore.

A liquid delivery device includes a constant flow valve, a pump and channels. A medicinal solution bag is connected to the liquid delivery device. The pump has a suction aperture, a discharge aperture and check valves. The constant flow valve includes a valve casing and a diaphragm that partitions the interior of the valve casing to form a first valve chamber and a second valve chamber. A first opening, a second opening, and a third opening are provided in the valve casing. A conical spring arranged between and in contact with a top plate and the diaphragm is provided in the second valve chamber. The spring applies a pressure towards an O-ring side to a second main surface of the diaphragm.

A pump for removing fluid from a floor covering includes a piston chamber, a piston disposed within the piston chamber, a nozzle plate for pressing against the floor covering and having a plurality of nozzles extending therefrom, a reservoir for storing fluid removed from the floor covering, and a diverting valve having an interior. The diverting valve defines a first fluid flow path, a second fluid flow path, and a third fluid flow path. A method of removing fluid from a floor covering includes causing a piston to move in a first direction within a piston chamber, drawing fluid through a plurality of nozzles of a nozzle plate and into the piston chamber, causing the piston to move in a second direction within the piston chamber, and pushing fluid from the piston chamber and into a reservoir extending circumferentially around the piston chamber.

A pumping unit (20) includes a hopper assembly (24) for holding material to be pumped, a pair of identical pumping assemblies (26, 28), and a pumped material outlet (30). The assemblies (26, 28) include directional or spool valves (54) having rotatable spools (76), tubular pumping chambers (56), and pistons (122) within the chambers (56). The pistons (122) include concave operating faces (134), which are complemental and mate with the outer surfaces of the spools (76). Operation of the unit (20) creates successive charges of pumped materials having a minimum of disruptions, such as tearing or smearing.

A header and a pump end for a cryogenic pump are provided for efficient liquid pumping operation. The header directs supplied liquid into a sump and gas into a freeboard. The liquid in the header can be distributed along the header and decanted over a weir to the sump, the liquid being drawn from the sump and up through the vessel to the pump end. Gas in the freeboard is collected for venting or return to the liquid source. Pump head plunger stroke can be lengthened and operated at slower stroke rates using a large cross-sectional area intake and discharge valves. Plunger seals, supported as a seal pack in a sleeve, are field installable over the plunger. A plunger to drive shim arrangement permits filed adjustment of the stroke.

A reciprocating fluid pump may include a pump body, one or more subject fluid chambers within the pump body, one or more drive fluid chambers within the pump body, and a shuttle valve for shifting flow of pressurized drive fluid between two or more conduits. The shuttle valve includes a valve body and a spool disposed within the valve body and configured to move between a first position and a second position within the valve body. The shuttle valve also includes one or more magnets carried by the spool. The magnets are located and configured to impart a force on the spool responsive to a magnetic field such that the spool is magnetically biased away from an intermediate position between the first position and the second position.