One or more systems are disclosed for leak detection for a pump that include a reservoir having a chamber with an inlet and an outlet. The inlet is configured to couple to an exhaust of a pump and the reservoir is configured to create a vortex flow therein. An optical sensor is positioned at a bottom of the reservoir with a detecting portion of the optical sensor extending into the chamber. The vortex flow causes one or more liquids to settle at the bottom of the reservoir on the optical sensor. The one or more liquids are indicative of a leak and the optical sensor is configured to detect the one or more liquids.

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 method and an apparatus for cleaning a channel, especially a transmission and/or cooling channel, in any type of device, machine, installation, and/or tool, particularly in any type of heat exchanger and/or a molding core, cavity and/or insert is proposed, wherein a channel is cleaned through dynamic, bi-directional pulsation of cleaning medium inside the to-be-cleaned channel, the method being realized by a cleaning apparatus equipped with a diaphragm pump module, plugged either only in the feed side of the transmission line or in the feed side and in the return side, which, after connecting the diaphragm pump module to the external energy source and shutting off the flow control system from the reservoir and the feed pump, allows for putting cleaning medium into a state of two-way dynamic pulsating motion.

A pumping cassette including a housing having at least two inlet fluid lines and at least two outlet fluid lines. At least one balancing pod within the housing and in fluid connection with the fluid paths. The balancing pod balances the flow of a first fluid and the flow of a second fluid such that the volume of the first fluid equals the volume of the second fluid. The balancing pod also includes a membrane that forms two balancing chambers. Also included in the cassette is at least two reciprocating pressure displacement membrane pumps. The pumps are within the housing and they pump the fluid from a fluid inlet to a fluid outlet line and pump the second fluid from a fluid inlet to a fluid outlet.

One or more techniques and/or systems are disclosed for an air operated double diaphragm pump with a selectably removable valve body for convenient repair and maintenance. The pump may include an inlet, an outlet, and first and second diaphragm chamber housings. Each first and second diaphragm chamber housings defines a diaphragm chamber. A valve body housing is arranged between the first and second diaphragm chamber housings. A valve body is arranged within the valve body housing, is in fluid communication with the diaphragm chambers of the first and second diaphragm chamber housings, and includes pilot signal ports, diaphragm chamber inlet ports, and chamber exhaust ports that are all accessible on a signal surface of the valve body. The signal surface may be on a same side of the valve body. To stabilize the pump during repair and maintenance, stabilizing feet may project from outer edges of the diaphragm chamber housings.

Described are fluid pumping and fluid handling systems, which may be suitable for use in medical devices, such as artificial or extracorporeal blood pumping systems. The systems can include a dual housing configuration for pneumatic actuation comprising a main housing containing a pump cassette comprising a pneumatically actuated pump and pneumatically actuated valves. The pump can include a pump actuation chamber and pump pneumatic port, and the valves can each include a valve actuation chamber and valve pneumatic port. Connecting tubes can be used to fluidly connect the pump actuation ports and valve actuation ports to a tube-support housing having a first side receiving one end of each connecting tube and a second side providing a pneumatic interface arranged to connect to an array of pneumatic receptacles on a base unit of the system to facilitate easy, compact and accurate pneumatic interconnection between the pump cassette and the base unit.

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 diaphragm pump system that includes a pair of working fluid diaphragm pump assemblies that are each fluidly connected to a working fluid flow. Each working fluid diaphragm pump assembly is operationally associated with a discrete drive arrangement that is fluidly isolated from the working fluid flow that is moved during operation of the pump system. A control arrangement is connected to the discrete drive arrangements and configured to control the cyclic operation of the pair of working fluid diaphragm pump assemblies to mitigate pulsatile effects in the combined working fluid flow when the discharges of the working fluid flows associated with operation of the pair of working fluid diaphragm pump assemblies is combined.

An automated fluid transfer system and method allows a person to pour fluid, such as used motor oil, into a collection pan which automatically pumps the fluid to a bulk storage tank, without secondary containment in the collection pan. The system utilizes an air powered pump, thereby eliminating the use of electricity which creates fire and explosion hazards. A float rises and falls in response to fluid in the pan, so as to automatically turn on and turn off the pump. An alternative manual mode is provided to allow fluid to be sucked by the pump from a container directly into the bulk storage tank, while bypassing the collection pan.

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.