Various fluid delivery systems are described comprising an infusion pump having a housing with a first opening and a hollow interior portion that is configured to receive a cartridge having a tubing. A pump unit can be disposed within the housing. The pump unit comprises a motor mechanically coupled with a crank shaft or eccentric cam that is configured to move a set of pistons or other objects to thereby compress one or more portions of the tubing over time as the crank shaft or eccentric cam rotates.

An ejector-type vacuum pump assembly containing a stabilizing membrane flow valve, wherein a pilot flow of pressurized air is used to regulate a main flow of pressurized air for driving an ejector-type vacuum pump is disclosed. The pilot flow is led to a downstream side of the membrane flow valve and is fed to the ejector of the ejector-type vacuum pump along with the main flow of pressurised air. The ejector-type vacuum pump assembly is primarily intended for automated gripping operations using a suction gripper. Also disclosed is a flow control unit for controllably exiting a flow of pressurized air to be fed to an ejector-type vacuum pump in the ejector-type vacuum pump assembly, and a method of controlling a vacuum level in a vacuum chamber of an ejector-type vacuum pump in an ejector-type vacuum pump assembly as described herein.

An ejector-type vacuum pump assembly containing a stabilizing membrane flow valve, wherein a pilot flow of pressurized air is used to regulate a main flow of pressurized air for driving an ejector-type vacuum pump is disclosed. The pilot flow is led to a downstream side of the membrane flow valve and is fed to the ejector of the ejector-type vacuum pump along with the main flow of pressurised air. The ejector-type vacuum pump assembly is primarily intended for automated gripping operations using a suction gripper. Also disclosed is a flow control unit for controllably exiting a flow of pressurized air to be fed to an ejector-type vacuum pump in the ejector-type vacuum pump assembly, and a method of controlling a vacuum level in a vacuum chamber of an ejector-type vacuum pump in an ejector-type vacuum pump assembly as described herein.