The invention relates to an actuator valve 136 of an air operated double diaphragm pump 100. The actuator valve 136 includes a valve housing 138, an inlet 142 for receiving air, a first set of ports 144a,144b for exchanging the air with air chambers 132a,132b, and a second set of ports 146a,146b for exhausting the air received from the air chambers 132a,132b into the atmosphere. The actuator valve 136 further includes a valve piston 148 accommodated within the valve housing 138. The valve piston 148 is configured to reciprocally slide within the valve housing 138 and has a bore 152 at one end. The actuator valve 136 further includes an end plate 156a,156b at each end of the valve housing 138, and has a boss 158 at the corresponding end. The boss 158 and the bore 152 are arranged such that the boss 158 mates with the bore 152.

A double diaphragm pump includes multiple diaphragms that are mounted for reciprocation. The diaphragms are connected for simultaneous movement to form a diaphragm assembly. A first one of the diaphragms is clamped between a housing cover and a center section. A pumping chamber is formed between the first diaphragm and the cover. Pressure in the first pumping chamber is decreased to draw the diaphragm assembly towards the first fluid cover, thereby drawing the second diaphragm into a mounting position relative to the center section. A second cover is then mounted to the center section to clamp the second diaphragm between the second cover and the center section.

An adjusting member may cause an axis line of connection end portions and an axis line of a housing side flange portion to be eccentric with respect to each other. The connection end portions and the housing side flange portions may be connected and the first attaching portion and the second attaching portion may be rotated to compress a sealing member. The position where the sealing member contacts an end face of the connection end portions may change by rotating each attaching portion and two connection targets can be directly connected.

A modular pump features a gas-control-and-drive-unit (GCDU), a cartridge-style-pumping-module (CSPU) and a retainer clip (RC). The GCDU includes a GCDU-housing to receive/provide gas to a gas-passageway causing a GCDU-force in one direction; an actuator-rod-and-slide-valve-arrangement (AR/SVA) to respond to a CSPM-force and exhaust the gas from the GCDU-housing causing a GCDU-exhaustion-force in an opposite direction; and a GCDU-coupling-member. The CSPM includes a CSPM-housing to receive a fluid to be pumped, and a piston-and-dual-diaphragm-arrangement (PDDA) to respond to the GCDU-force, provide the CSPM-force and pump the fluid from the CSPM, and to respond to the GCDU-exhaustion-force and pump the fluid from the CSPM. The CSPM-housing includes a CSPM coupling member to detachably couple to the GCDU-coupling-member. The RC detachably couples a piston of the PDDA and an actuator rod of the AR/SVA, so the CSPM attaches/detaches from the GCDU using a three-step process for field replacement using the RC.

A diaphragm pump mechanically operable air pressure regulator assembly that is operable in direct response to the relative operation of an associated diaphragm pump system. The regulator assembly includes a housing that is constructed to receive a static air pressure signal. A cam arrangement is disposed in the regulator housing and is constructed to mechanically cooperate with a shaft of a respective diaphragm pump system. Axial translation of the shaft of the diaphragm pump system effectuates rotation of the regulator cam arrangement. The relative motion of the cam arrangement with respect to the regulator housing manipulates a force associated with a biasing device disposed in the regulator and thereby the relative degree of the static air pressure signal that is communicated to the respective diaphragm pump system.

A fluid cover for a displacement pump includes an inlet and an outlet oriented to provide desired flow characteristics to fluid entering a fluid chamber defined between the fluid cover and a diaphragm. The inlet is positioned to provide fluid to the fluid chamber at an oblique angle relative to the fluid cover. The oblique angle prevents the fluid from impinging on the fluid cover and the diaphragm, thereby maintaining a fluid velocity within the fluid chamber. The fluid velocity and rotational movement of the fluid facilitates flushing of the fluid chamber, as areas of low velocity or no velocity are eliminated from the fluid chamber, thereby preventing residuals from settling within the fluid chamber. The outlet is also positioned at an oblique angle to the fluid cover to maintain the rotational movement of the fluid flow.

Multiple diaphragm pumps are known in the art that are operated by compressed air and in which the valves are controlled by a slide element. The slide element is magnetically actuated without mechanical engagement involved in the actuation. This has the consequence that only a small amount of force can be applied which may not be sufficient due to static friction of the valve seal. The invention presents a hybrid solution which facilitates a mechanical actuation of a valve piston provided for valve control as well as a magnetic overcoming of a dead center that may be reached by the valve piston and the diaphragm piston that actuates the diaphragms of the multiple diaphragm pump.

A system includes an integrated manifold system including multiple isobaric pressure exchangers (IPXs) that each includes a low-pressure first fluid inlet, a high-pressure second fluid inlet, a high-pressure first fluid outlet, and a low-pressure second fluid outlet. The integrated manifold system includes a low-pressure first fluid manifold coupled to each of the low-pressure first fluid inlets and configured to provide low-pressure first fluid to each of the low-pressure first fluid inlets, a high-pressure second fluid manifold coupled to each of the high-pressure second fluid inlets and configured to provide high-pressure second fluid to each of the high-pressure second fluid inlets, a high-pressure first fluid manifold coupled to each of the high-pressure first fluid outlets and configured to discharge high-pressure first fluid, and a low-pressure second fluid manifold coupled to each of the low-pressure second fluid outlets and configured to discharge low-pressure second fluid.

A positive displacement pump includes a housing surrounding a drive chamber and a diaphragm compartment. A drive element is inside the drive chamber. A diaphragm is inside the diaphragm compartment and divides the diaphragm compartment into a fluid chamber and a cavity. A shaft connects the drive element and the diaphragm. A breather valve is fluidically connected to the cavity and is configured to allow air to exit the cavity. The cavity is fluidically disconnected from the drive chamber.

A four-cylinder diaphragm pump includes a pump body having four pump chambers, and a drive mechanism that expands and contracts the four pump chambers with a predetermined phase difference, in which the pump body includes a first diaphragm having two diaphragm portions on a same plane, and a second diaphragm having two diaphragm portions on a same plane disposed to be located to be parallel to or coplanar with the plane of the first diaphragm, each of the diaphragm portions of the first diaphragm and the second diaphragm constitute a portion of a different pump chamber, and the drive mechanism is configured to move the diaphragm portions of the first diaphragm and the second diaphragm forward or backward with respect to the corresponding pump chambers with a predetermined phase difference.