A pump housing includes an integral vent flow path extending between a low-pressure region and the reservoir. The vent path provides fluid communication between the downstream side of a throat seal dividing the low-pressure region from a high-pressure region and the reservoir. Lubricant flows through the vent path from the reservoir to the low-pressure region to provide lubrication to the throat seal.

A pump housing includes an integral vent flow path extending between a low-pressure region and the reservoir. The vent path provides fluid communication between the downstream side of a throat seal dividing the low-pressure region from a high-pressure region and the reservoir. Lubricant flows through the vent path from the reservoir to the low-pressure region to provide lubrication to the throat seal.

An apparatus for compressing and pumping water, including a reservoir; a stopper dividing the reservoir; a water fill pipe configured to provide the water to a lower portion of the reservoir; an outlet pipe connected to the lower portion of the reservoir; a compressed air feed pipe configured to provide compressed air to an upper portion of the reservoir such that the compressed air presses on the stopper and the water is forced by the stopper to escape from the lower portion of the reservoir through the outlet pipe; and a processor configured to determine a water pumping rate of the water while the water escapes through the outlet pipe, and to control the compressed air feed pipe to provide the compressed air at an air pumping rate equal to the water pumping rate.

An apparatus for compressing and pumping water, including a reservoir; a stopper dividing the reservoir; a water fill pipe configured to provide the water to a lower portion of the reservoir; an outlet pipe connected to the lower portion of the reservoir; a compressed air feed pipe configured to provide compressed air to an upper portion of the reservoir such that the compressed air presses on the stopper and the water is forced by the stopper to escape from the lower portion of the reservoir through the outlet pipe; and a processor configured to determine a water pumping rate of the water while the water escapes through the outlet pipe, and to control the compressed air feed pipe to provide the compressed air at an air pumping rate equal to the water pumping rate.

A method and system providing a pressurized fluid includes a pump having a pump inlet and a pump outlet, the pump to provide a fluid flow, a bypass path to direct the fluid flow from the pump outlet to the pump inlet, a load path having a load path pressure, the load path including: a fluid accumulator to accumulate a fluid volume, and at least one load device, a bypass regulator valve in fluid communication with the pump outlet, the bypass path, and the load path, and a controller to direct the fluid flow to the load path in response to the load path pressure being less than a low load path threshold pressure via the bypass regulator valve and to direct the fluid flow to the bypass path in response to the load path pressure being greater than a high load path threshold pressure via the bypass regulator valve.

A method and system providing a pressurized fluid includes a pump having a pump inlet and a pump outlet, the pump to provide a fluid flow, a bypass path to direct the fluid flow from the pump outlet to the pump inlet, a load path having a load path pressure, the load path including: a fluid accumulator to accumulate a fluid volume, and at least one load device, a bypass regulator valve in fluid communication with the pump outlet, the bypass path, and the load path, and a controller to direct the fluid flow to the load path in response to the load path pressure being less than a low load path threshold pressure via the bypass regulator valve and to direct the fluid flow to the bypass path in response to the load path pressure being greater than a high load path threshold pressure via the bypass regulator valve.

An exemplary method includes using a pressure supply device (PSD) to actuate a hydraulic customer includes activating, when in the first position, a first gas generator of the multiple gas generators thereby driving the piston to the second position, pressurizing the hydraulic fluid, and discharging the pressurized hydraulic fluid to the customer; actuating the customer in response to receiving the pressurized hydraulic fluid; resetting the piston to first position by transferring a resetting hydraulic fluid into the reservoir; and exhausting gas and condensate from the gas chamber in response to resetting the piston to the first position.

An exemplary method includes using a pressure supply device (PSD) to actuate a hydraulic customer includes activating, when in the first position, a first gas generator of the multiple gas generators thereby driving the piston to the second position, pressurizing the hydraulic fluid, and discharging the pressurized hydraulic fluid to the customer; actuating the customer in response to receiving the pressurized hydraulic fluid; resetting the piston to first position by transferring a resetting hydraulic fluid into the reservoir; and exhausting gas and condensate from the gas chamber in response to resetting the piston to the first position.

A device for monitoring a pneumatically-actuated alternating linear displacement pump is provided, and a system for monitoring a pneumatically-actuated alternating linear displacement pump is provided, which include elements for sensing pneumatic pressure, elements for transmitting a signal representative of the sensed pneumatic pressure, and elements for managing the pneumatically-actuated alternating linear displacement pump in accordance with the transmitted signal representative of the sensed pneumatic pressure.

A device for monitoring a pneumatically-actuated alternating linear displacement pump is provided, and a system for monitoring a pneumatically-actuated alternating linear displacement pump is provided, which include elements for sensing pneumatic pressure, elements for transmitting a signal representative of the sensed pneumatic pressure, and elements for managing the pneumatically-actuated alternating linear displacement pump in accordance with the transmitted signal representative of the sensed pneumatic pressure.