The UK’s Leading Pump Specialist Since 1971 For Difficult .
michael smith engineers ltdThe UK’s leading pump specialist since 1971for difficult liquid handling applicationsHow aPeristalticPump worksFreephone 0800 3167891 info@michael-smith-engineers.co.uk www.michael-smith-engineers.co.uk
michael smith engineers ltdThe UK’s leading pump specialist since 1971for difficult liquid handling applicationsPeristaltic Principle The tubing is fixed between the tube-bed and the rotor at each roller location the tubing is squeezed position A, B and C The rollers on the revolving rotor move across thetubing the tubing is continuously squeezed by the rollers whichpush the liquid in the direction of the revolving rotor The tubing behind the rollers recovers its shape,creates a vacuum and draws liquid in behind it.Freephone 0800 3167891 info@michael-smith-engineers.co.uk www.michael-smith-engineers.co.uk
michael smith engineers ltdThe UK’s leading pump specialist since 1971for difficult liquid handling applicationsPeristaltic Principle A ‘pillow’ of liquid is formed between therollers the pillow is the pump chamber anddetermines the volume per roller step and,hence, the flow rate the pillow volume not only depends on theinner diameter (i.d.) of the tubing, but alsoon the tubing properties, the drive andpump-head specifications as well as theliquid and the physical applicationconditionsFreephone 0800 3167891 info@michael-smith-engineers.co.uk www.michael-smith-engineers.co.uk
michael smith engineers ltdThe UK’s leading pump specialist since 1971for difficult liquid handling applicationsRoller-step volumeThe pillow volume determines the roller-stepvolume which depends on: Pump system Tubing number of rollers inner diameter pump-head design wall thickness- e.g. spring-loaded tube-bed occlusion setting formulation age of tubing rotation speed Liquid Application conditions type of liquid suction lift / vacuum temperature differential pressure viscosityFreephone 0800 3167891 info@michael-smith-engineers.co.uk www.michael-smith-engineers.co.uk
michael smith engineers ltdThe UK’s leading pump specialist since 1971for difficult liquid handling applicationsFlow rateThe flow rate is calculated as follows: Volume per roller step (pillow volume)x Number of rollers Volume per revolution Volume per revolutionx Rotation speed per minute Flow rate per minuteFreephone 0800 3167891 info@michael-smith-engineers.co.uk www.michael-smith-engineers.co.uk
michael smith engineers ltdThe UK’s leading pump specialist since 1971for difficult liquid handling applicationsAdvantages no contact of the liquid with mechanical parts tube is only part to wear service and maintenance costs are minimal easy to clean and sanitize multi-channel systems available Ismatec pumps available up to 24 channels insensitive to dry-runningFreephone 0800 3167891 info@michael-smith-engineers.co.uk www.michael-smith-engineers.co.uk
michael smith engineers ltdThe UK’s leading pump specialist since 1971for difficult liquid handling applicationsAdvantages self-priming excellent suction height use tubing with small i.d., thick wall and stiff material no siphoning effect when pump is stopped immune to many chemicals depends on the tubing material suspensions and sludge can be pumped with a solid content of up to 60%Freephone 0800 3167891 info@michael-smith-engineers.co.uk www.michael-smith-engineers.co.uk
michael smith engineers ltdThe UK’s leading pump specialist since 1971for difficult liquid handling applicationsAdvantages virtually immune to abrasive media liquids of high viscosity can be delivered gentle delivery due to very low shearing forces ideal for delicate suspensionse.g. blood cells or bio-technological media are not damaged some tubing material can be autoclaved very high repeatability - suitable for auto-analyzers pumps system must be calibratedFreephone 0800 3167891 info@michael-smith-engineers.co.uk www.michael-smith-engineers.co.uk
michael smith engineers ltdThe UK’s leading pump specialist since 1971for difficult liquid handling applicationsLimitations chemical inertness depends on the tubing material slight pulsation is inevitable tubing requires recalibrating and changing due to wear at certain intervals depending on the application very important for accurate and repeatable pumping more frequently in comparison to gear and piston pumps tubing may leak after extensive useFreephone 0800 3167891 info@michael-smith-engineers.co.uk www.michael-smith-engineers.co.uk
michael smith engineers ltdThe UK’s leading pump specialist since 1971for difficult liquid handling applicationsLimitations depending on the pump-head system the flowrate is sensitive to varying differential pressureconditions (all spring-loaded tube-beds!) accuracy and repeatability of the flow rate alsodepend on the tubing age and material used max. differential pressure is lower in comparisonto gear and piston pumps depends very much on tubing material and inner diameterin relation to wall thicknessFreephone 0800 3167891 info@michael-smith-engineers.co.uk www.michael-smith-engineers.co.uk
michael smith engineers ltdThe UK’s leading pump specialist since 1971for difficult liquid handling applicationsTubing sizeThe tubing is the pump chamber of the peristalticpump and, hence, one of the most important parts !The following tubing specifications have particulareffects on the pumping process: inner diameter (ID) wall thickness (WT) material (formulation)Different combinations of these parameters change thepumping behavior and consequently lead to differentresults.Freephone 0800 3167891 info@michael-smith-engineers.co.uk www.michael-smith-engineers.co.uk
michael smith engineers ltdThe UK’s leading pump specialist since 1971for difficult liquid handling applicationsTubing Life Life expectancy of the tubing depends on thefollowing features: tubing material drive speed number of rollers operating temperature pressure conditions liquid used chemical composition, particles, etc tube-bed and roller design Ismatec catalogue provides overview of approximatetubing lifeFreephone 0800 3167891 info@michael-smith-engineers.co.uk www.michael-smith-engineers.co.uk
The UK’s leading pump specialistViking Gear PumpsLiquiflo Gear PumpsFinish Thompson Drum & Centrifugal PumpsOFFICIALMicropump Gear PumpsCodip Air Operated PTFE Diaphragm PumpsDISTRIBUTORSFOR:Hydra-Cell High Pressure Diaphragm PumpsIsmatec Peristaltic PumpsHNP Gear PumpsFluid Metering Piston PumpsM Pumps, Centrifugal,Turbine and Vane PumpsMichael Smith Engineers Tel: 0800 316 smith-engineers.co.uk
Ismatec catalogue provides overview of approximate tubing life Tubing Life. . The UK’s leading pump specialist Viking Gear Pumps Micropump Gear Pumps Hydra-Cell High Pressure Diaphragm Pumps Ismatec Peristaltic Pumps Finish Thompson Drum & Centrifugal Pumps Codip Air Operated PTFE Diaphragm Pumps HNP Gear Pumps M Pumps, Centrifugal,
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