A membrane pump typically exhibits high hydraulic capacitance because its structure allows large volume changes from the pumping chamber.
Based on the definition of the hydraulic capacitance, the pressure change is the primary problem when measuring the hydraulic capacitance of the microfluidic membrane pump. The pressure-deflection relation of the membrane provides an alternative solution, allowing membrane deflection to be measured without measuring the pressure applied to that membrane.
where the plus and minus symbols in (12) and (13) refer to the charge and discharge behaviors of the membrane pump, respectively.
The dimensions of the microfluidic modular membrane pump were 20 mm x 20 mm x 10 mm and the diameter of the channel was 0.5 mm.
In this study, a novel approach was proposed to measure the hydraulic capacitance of a microfluidic membrane pump. Two parameters were measured: the volume change of the membrane pump and the center deflection of the membrane when external force was applied.
In addition, the efficacy of the design means that the meters are not affected by pulsating flow, -- they can be used with membrane pumps
-- and they have only a minimal pressure drop: up to 0.5 bar when correctly sized.
Duplex membrane pumps
apply a small vacuum to extract clarified water (permeate) from the membranes and convey it to the ozone system.
The product allows efficient working because it dries fast and can be applied with all commonly used spraying equipment, such as double membrane pumps
and cup guns.
Maintenance and cleaning on the Schiele is performed when the machine's membrane pumps
suction the system dry and the cleaning function uses water to wash the application unit and separation chamber.
ABEL has also shipped two large HMQ series membrane pumps
to a gold and silver mine in Chile, where they are being used for dewatering.
Supply of detergents, installation of membrane pumps
with flowmeters and maintenance.