Presented By:- JOSEPH PAUL P.V. ROLL NO:-53 S7 ME-1

CONTENTS PRINCIPLE MAIN PARTS WORKING FLUID PILLOW CHARACTERISTICS CLASSIFICATION EFFECT OF ROLLERS DRIVE SELECTION FLEXIBLE TUBE TUBE SELECTION TUBE MATERIALS TUBE DESIGN ADVANTAGES DISADVANTAGES APPLICATIONS CONCLUSION REFERENCES

PRINCIPLE The process of peristalsis is used by peristaltic pump Peristalsis is the process of involuntary wave like successive muscular contraction by which food is moved through the digestive tract

MAIN PARTS FLEXIBLE TUBE ROLLERS/CAMS ( made symmetrical ) ROTOR CASING

WORKING The rollers squeezes the tube forcing the fluid along. Restitution creates a vacuum which further draws the fluid into the pump.

CHARACTERISTICS Fluid only comes into contact with the tube. (no direct contact with the moving part) It is a positive displacement pump Gentle pumping action Output not uniform

FLUID PILLOW The volume of fluid in between the 2 adjacent rollers is called as FLUID PILLOW. Flow Rate = volume of fluid pillow * speed of rotor(rpm) * no of pillows in 1 min.

EFFECT OF ROLLERS If the no of rollers increase:- 1.flow rate decreases. 2.more uniform flow 3.high exit pressure. 4.less tube life If the no of rollers decrease:- 1.flow rate increases. 2.less uniform flow 3.low exit pressure 4.more tube life

CLASSIFICATION 1. ROTARY PUMP

2. LINEAR PUMP ( used to pump heavily viscous fluids )

DEGREE PUMP ( large flow rate, long tube life, low exit pressure)

DRIVE SELECTION Fixed speed type Variable speed type Digital input type

FLEXIBLE TUBE The tube of Peristaltic pump is its “heart”. Its restitution creates suction its strength resists pressure its flex resistance determines pumping life its bore defines the flow rate It’s the most important part

TUBE SELECTION Chemical Compatibility Non-contamination Flex Life Clarity Stiffness Pressure Temperature Non-adhesive

TUBE MATERIAL Polyvinyl chloride(PVC) ( hard, cheap. 10  70 c) Natural rubber( very cheap. 80  -20 c) Acrylonitrile butadiene rubber( Buna N) ( resistant to oils, grease, alkalis, detergents. 80  -10 c) Ethylene propylene diene rubber(EPDR) ( resistant to ketones, alcohols, acids. 90  -10) Chlorosuphonyl polyethylene rubber(CSR) ( resistant to bases & other oxidizing fluids. 80  -10 c) Marpene, bioprene, chemsure, neoprene, stapure, pumpsil, fluorel, tygon, viton etc.

TUBE DESIGN 1. Inner layer in various types of rubber 2. Intermediate layer Reinforced with nylon 3. Outer layer precision- machined 4. Outer most layer which is roughened

ADVANTAGES Fluid does not contact any part of the pump except the tubing. No Seals to leak, No valves to clog or wear Doesn’t require expensive ancillary equipment Fewer parts to inventory Self priming (up to 30 ft. (8.8 m) in some models) tubing materials can be easily sterilized. Easily cleaned at the end of the day, saves time Hygienic Easily repaired (just have to change the tube)

Advantages(contd.) Thus a peristaltic pump with a new pipe is like a new pump Easy to use, little operator training required Many types of tubing are available. Wide selection of drives/motors(variable speed) Is fully reversible to blow out clogged suction and drain lines safely Gentle pumping action No back flow(slip) Accurate Same pump could be used to pump other fluids (just change the tube to suitable one) Ultimately cost effective.

DISADVANTAGES Flow not perfectly uniform Cannot pump above 10/11 meters Uneconomical for long distance pumping. High exit pressures cannot be obtained Selection of tube should be done carefully.

APPLICATIONS Laboratory research. Pharmaceutical industry Food industry Chemical industry Cosmetics industry Paint industry Paper industry Ceramic industry Beverage industry Detergent industry

Applications(contd.) Textile industry Manufacturing of glues & emulsions Blood transfusions & dialysis machines Waste water & sewage treatment Nuclear power plants Manufacturing of bio-diesel Pumping concrete in large construction works Under ground water sampling Aquariums & sea water pumping.

CONCLUSION Thus peristaltic pumps have very low maintenance cost and a trouble free service life. Its operations are simple and its easily repairable. Best suited for pumping viscous, colloidal, aggressive, volatile liquids. It has a promising future because as time passes more and more highly developed & reinforced tube materials are discovered.

REFERENCES Wikipedia.com watson-marlow.com Coleparmer.com Freepatentsonline.com Lamdalabs.com Verderflex.com