The invention relates to a combination metering assembly for filling liquid products into containers. The invention is characterised by a base unit (1) and pump components (3, 4, 5, 6, 11, 12, 13, 14) of at least two different pump types for a metering operation, wherein the pump components of each pump type can be combined with the base unit in order to form a pump system of the corresponding pump type, and the base unit has connection means (19, 23) for this purpose which are compatible with the connections of the pump components. The combination metering assembly can be adapted to different metering situations with little complexity and has a comparably small space requirement.

In a control system for operating a pump, the pump is pneumatically driven to pump hydraulic fluid to pressurize a closed vessel. The control system includes inlet and outlet ports, a pneumatic regulator, a pressure transducer, and control circuitry. The inlet and outlet ports are configured to receive inlet and output outlet pressurized air, respectively. The outlet pressurized air powers the pump. The pneumatic regulator is disposed between the ports, and configured to receive the inlet air and output the outlet air. The pneumatic regulator includes a valve that modulates pneumatic pressure based on a control signal. The pressure transducer provides a hydraulic pressure signal indicative of pressure at the output of the pump. The control circuitry is configured to adjust a parameter of the control signal based on this hydraulic pressure signal, and output the control signal to the pneumatic regulator to indirectly control operation of the pump.

A manually actuated chromatography device comprising a chamber for receiving a liquid sample, a pump with a metering valve, and a chromatography element, wherein the pump moves a predetermined volume of liquid from the sample chamber to the chromatography element.

A manually actuated chromatography device comprising a chamber for receiving a liquid sample, a pump with a metering valve, and a chromatography element, wherein the pump moves a predetermined volume of liquid from the sample chamber to the chromatography element.

An air-operated pump, such as an air-operated diaphragm pump, includes a pump body, a process liquid pathway defined at least in part by the pump body, and an air pathway defined at least in part by the pump body, where the process liquid pathway and air pathway are fluidly separated from one another within the pump body. The pump further includes a leak detection and containment assembly integrated with the pump body and having a process liquid sensor configured to sense process liquid leaked from the process liquid pathway into the air pathway, and a shutoff valve communicatively coupled to the process liquid sensor and configured to close in response to the process liquid sensor sensing a process liquid leak to contain the leaked process liquid within the pump body and the assembly.

The invention relates to a low-pressure starter device for pneumatic pumps with a pivoting directional air-control valve, characterised in that the low-pressure starter system consists of a retractable push piston actuated by a variable-tension spring that exerts pressure on the shaft of a pivoting element of the body of the directional valve, during start-up, in an end operating positions, said device being formed by a retractable piston, a sealing gasket, a spring and a spring stop.

The invention relates to a low-pressure starter device for pneumatic pumps with a pivoting directional air-control valve, characterised in that the low-pressure starter system consists of a retractable push piston actuated by a variable-tension spring that exerts pressure on the shaft of a pivoting element of the body of the directional valve, during start-up, in an end operating positions, said device being formed by a retractable piston, a sealing gasket, a spring and a spring stop.

A system for pumping hydrocarbon bulk fluids includes an air-driven rotary or reciprocating positive displacement pump in fluid communication with a tank containing the hydrocarbon bulk fluid. The pump contains an inlet and an outlet. A filter or strainer is contained within the inlet for removing debris from the bulk fluid. An oiler is provided for injecting an oil and/or antifreeze mixture into an air stream provided to the air-driven positive displacement pump. A method of pumping a bulk fluid such as a hydrocarbon fuel, from one tank to another, is also presented.

Disclosed is a device for pressurizing a viscous fluid contained in a drum, the device includes a follower plate vertically movable along a perpendicular axis passing through the center of the drum, the follower plate: is movable between a first position outside the drum and a second position inside the drum, to exert pressure on the viscous fluid; has a transfer port intended to be connected to a means of pumping capable of transferring the pressurized fluid. The device further includes an energy storage unit and restoration connected to the support system, the storage unit being capable of storing energy under the effect of the pressure exerted by the support system and of restoring it to the follower plate in order to maintain the viscous fluid under pressure.

A pneumatic pump control system includes a pump chamber having a top end and a bottom end, an air valve coupled to the top end of the pump chamber and configured to be coupled to a pressurized air source, and a pump chamber valve coupled to the bottom end of the pump chamber. In addition, the pneumatic pump control system includes a discharge chamber having a top end and a bottom end, a discharge fitting coupled to the top end of the discharge chamber, a discharge check valve coupled to the bottom end of the discharge chamber in fluid communication with the pump chamber valve, and an inlet check valve in fluid communication with the pump chamber.