Aspects are provided for a case for a pump assembly having a base and an enclosure assembly. The enclosure assembly includes a case cover coupled to the enclosure assembly via a gasket, wherein the case cover and the enclosure assembly form a gap between the case cover and the enclosure assembly in a portion of the case cover without the gasket, a display, a plurality of bosses, a frame plate removable fastened to the plurality of bosses, wherein the display is fixedly attached to the case cover when the frame plate is fastened to the plurality of bosses, and one or more drainage channels disposed at an underside surface of the case cover, the one or more drainage channels being configured to divert fluid away from the display.

An improved high-pressure fuel pump for a gasoline direct injection system is provided. The fuel pump includes a pump body defining a low-pressure side, a high-pressure side, and a pumping chamber therebetween. The pump body also defines a central bore and a drain port extending from the central bore to the low-pressure side. A slip-fit sleeve is clamped within the central bore, the slip-fit sleeve including upper and lower guide ribs. A plunger is moveable within the sleeve for compressing fuel within the pumping chamber. The plunger and the sleeve define a first diametral clearance, and the guide ribs and the central bore define a second diametral clearance. Fuel diverting around the upper guide rib during pumping operations can recirculate through the drain port to the low-pressure side. To accommodate thermal expansion of the sleeve, the second diametral clearance is at least 75% of the first diametral clearance.

A system attachable to a refrigeration circuit includes a recovery pump attachable to the refrigeration circuit to remove refrigerant. The recovery pump includes a pump, an electric motor, a battery pack, and a recovery pump controller for controlling the operation of the electric motor. The recovery pump controller has a first communication interface. The system further includes an accessory attachable to the refrigeration circuit concurrently with the recovery pump. The accessory includes a sensor for detecting a characteristic value of the refrigeration circuit, and an accessory controller electrically connected with the sensor to receive a signal corresponding with the characteristic value of the refrigeration circuit. The accessory controller has a second communication interface to communicate the signal to the recovery pump controller via the first and second wireless interfaces. The recovery pump controller controls the operation of the electric motor based upon the signal received from the accessory.

A system attachable to a refrigeration circuit includes a recovery pump attachable to the refrigeration circuit to remove refrigerant. The recovery pump includes a pump, an electric motor, a battery pack, and a recovery pump controller for controlling the operation of the electric motor. The recovery pump controller has a first communication interface. The system further includes an accessory attachable to the refrigeration circuit concurrently with the recovery pump. The accessory includes a sensor for detecting a characteristic value of the refrigeration circuit, and an accessory controller electrically connected with the sensor to receive a signal corresponding with the characteristic value of the refrigeration circuit. The accessory controller has a second communication interface to communicate the signal to the recovery pump controller via the first and second wireless interfaces. The recovery pump controller controls the operation of the electric motor based upon the signal received from the accessory.

A breather assembly for a peristaltic pump comprises a breather tube and a cap connected to the breather tube. The cap comprises a sealing portion. One of the breather tube and the cap comprises a guide track and the other of the breather tube and the cap comprises a protrusion. The guide track comprises first and second sections separated by a first formation. The second section is bounded at its distal end by a second formation. The protrusion can pass the first formation when a first force is applied to the cap. The protrusion can pass the second formation when a second force is applied to the cap. When the protrusion is located within the first section, the sealing portion of the cap seals against the breather tube. When the protrusion is located within the second section, the sealing portion of the cap is spaced from the breather tube.

A breather assembly for a peristaltic pump comprises a breather tube and a cap connected to the breather tube. The cap comprises a sealing portion. One of the breather tube and the cap comprises a guide track and the other of the breather tube and the cap comprises a protrusion. The guide track comprises first and second sections separated by a first formation. The second section is bounded at its distal end by a second formation. The protrusion can pass the first formation when a first force is applied to the cap. The protrusion can pass the second formation when a second force is applied to the cap. When the protrusion is located within the first section, the sealing portion of the cap seals against the breather tube. When the protrusion is located within the second section, the sealing portion of the cap is spaced from the breather tube.

A method of attenuating pressure pulsations, comprises: pumping liquid into a vessel in fluid communication with a flow line by a conduit sealingly passing through a top surface of the vessel, so as to discharge the liquid into the flow line while creating an air-liquid interface in the vessel, by trapping in an upper part of the vessel air that attenuates pressure pulsations caused by the pumping. The method also comprises generating condition for the liquid to drain out of the vessel to allow air to fill at least the upper portion of the vessel.

A method of attenuating pressure pulsations, comprises: pumping liquid into a vessel in fluid communication with a flow line by a conduit sealingly passing through a top surface of the vessel, so as to discharge the liquid into the flow line while creating an air-liquid interface in the vessel, by trapping in an upper part of the vessel air that attenuates pressure pulsations caused by the pumping. The method also comprises generating condition for the liquid to drain out of the vessel to allow air to fill at least the upper portion of the vessel.

The invention relates to a drain valve for a cooler of a compressor, with a pressure chamber which can be connected to the inner chamber of the cooler by means of a connection opening, and an outlet for removing a condensate. The valve according to the invention comprises a pneumatic switching device and a non-return valve which are operatively connected to the pressure chamber, with an operative connection between the switching device and the non-return valve by means of which the non-return valve can be switched to an open position by the switching device. During the idle operation of the compressor, the non-return valve can be switched by means of the switching device into an open position such that condensate from the connection opening can be removed through the outlet via the non-return valve.

The invention relates to a drain valve for a cooler of a compressor, with a pressure chamber which can be connected to the inner chamber of the cooler by means of a connection opening, and an outlet for removing a condensate. The valve according to the invention comprises a pneumatic switching device and a non-return valve which are operatively connected to the pressure chamber, with an operative connection between the switching device and the non-return valve by means of which the non-return valve can be switched to an open position by the switching device. During the idle operation of the compressor, the non-return valve can be switched by means of the switching device into an open position such that condensate from the connection opening can be removed through the outlet via the non-return valve.