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Peristaltic Pumps for Industrial Applications

  SIMPLEX STRAINERS ARTICLE

Our previous article “Characteristics of Industrial Peristaltic Pumps” described modern hose pump design.  This article describes the multitude of applications benefiting from the unique and sealless design of peristaltic pumps. 

Peristaltic pumps are used in lieu of air-operated diaphragm (AOD), progressing cavity (PC), gear and rotary lobe style pumps for the following types of applications: 

Shear and emulsion sensitive fluids
Characteristics of some fluids are negatively affected due to agitation and mixing; examples include paints might be thinned, cornstarch thickened and egg whites separated from yolks.  “Gentle pumping” improves process and product consistency.

Slurries, sludge's and viscous fluids
Semi liquid mixtures and viscous fluids are less “flowable” and often contain particulate.  Pumps that withstand the potential for abrasive wear as well as handling the suction and discharge requirements for such applications improve reliability and reduce maintenance.

Contamination
As containment of the pumped fluid protects employees and the work environment, likewise isolation of the pumped fluid from the environment contributes to product purity.  Peristaltic pumps eliminate a leakage path, reducing potential of contamination either way.

Suction lift, self-priming and dry running
These process characteristics relate directly to efficiency and reliability.  Compared to other pump styles, peristaltic hose pumps perform the best for each of these common inlet conditions.

Reducing CostsThe most common denominator for all peristaltic pump applications is reduced operational costs due to a combination of less maintenance (parts & labor), increased reliability and improved product quality.  Other pumps leak, clog and corrode due to designs having seals, valves, diaphragms and rotors.

Technological advancements in peristaltic hose design have increased the application range of modern peristaltic hose pumps.  Innovative materials and complex multilayered hose designs have increased the restitutive ability of peristaltic pump hoses.  Since the main wear component is the hose, maximizing the number of compressions between replacements corresponds directly to cost effectiveness. 

Following are examples of applications within the chemical processing industry (CPI), water and waste treatment (WWT) and food manufacturing industries which highlight the advantages of the peristaltic hose pump design.

It's not easy being greenIt is easy being “green”!
The chemical processing industry as relates to pumping applications often involves non-water based fluids in which the process or personnel benefit from being isolated from the material pumped.  Peristaltic pump applications in the CPI are often additive in nature, transferring or dispensing fluid between locations.

One such application is the transfer of paint and dye.  These materials are often shear sensitive and viscous, so the gentle pumping action involving only the compression of a hose with smooth interior finish supports efficient transfer with the suction lift and discharge pressure typically required.

Potential for cross contamination is eliminated by swapping hoses for different colors rather than using expensive solvents that ultimately become a hazardous fluid to recycle or dispose.

The reversible nature of peristaltic hose pumps enables transfer to and from an applicator, reducing the number of pumps required.

Waste sludge transferWater and waste treatment (WWT) applications involve dispensing chemicals and moving gritty sludge. 

Reliably dosing chemicals to purify, control foaming and promote flocculation benefit from the sealless peristaltic hose pump design.  In addition to being hazardous to personnel and the environment, some of these chemicals are shear sensitive, losing their flocculation efficiency when over-agitated.

It is common to replace AOD pumps due to sticky polymers clogging check valves, high pressure related stalling and cold weather icing of input air because peristaltic pumps have no valves, can output higher pressures and are unaffected by cold weather.  Get rid of the AOD’s and reduce your air compressor requirements!

It is important to transfer abrasive flocculants, sludge and gritty scum for further processing and disposal with a sealless design that is capable of sufficient suction and pressure to move these semi liquid materials without leakage.
Typical WWT Chemicals
Chemical Purpose
Sodium Hypochlorite Disinfection & odor removal
Aluminum Sulfate Sodium Aluminate Coagulation (flocculation) of suspended impurities
Aluminum Hydroxide Removal of excess fluoride
Potassium Hydroxide pH adjustment

Peristaltic Pump for FoodFood & Beverage Manufacturing
Considering the effort required to make a nice “from scratch” meal at home, imagine the throughput and automation required for mass production of food.  Whether it is a vitamin supplement, loaf of bread or your favorite snack, peristaltic hose pumps are used to dose, mix and transfer ingredients due to their accuracy and ease of clean-up.

There are no check valves or anything else in contact with the fluid except the hoses, which are available in several FDA and EC certified materials.

Mmm…Donuts!
It is desirable to keep some ingredients whole, such as nuts and fruit pieces found in fruitcake dough.

Likewise, cream, milk and yogurt are also shear sensitive, benefitting from the gentle pumping action of a peristaltic hose pump.

Mmmm Donuts 

Ingredients such as vitamins have a tendency towards crystallization and are abrasive in nature.  Since the rotary pumping mechanism of a peristaltic hose pump is external to the material pumped, there is less contamination and leakage potential. Dry cavity roller style peristaltic hose pumps have a light food-grade grease applied externally to the hose whereas the shoe style peristaltic pumps require glycerin or glycol reservoir for hose lubrication.

Peristaltic MUST PumpA “MUST” have Pump!
Peristaltic hose pumps are used by wineries for transferring must (whole, de-stemmed or pressed grapes), lees (residual yeast) and wine. Their gentle pumping action decreases oxidation, shaking, emulsion and deformation of grapes/seeds.  They are also used for tank transfers (settling and blending of wines) and barrel racking (transferring wine from aging barrels to tanks for bottling).  Unlike flexible impeller pumps which are easily damaged when operated dry, peristaltic hose pumps can vacuum out a sump or vessel quickly.

Solving Problems
Having a flow range from 18 GPH to over 200 GPM and capable of a discharge pressure over 200 PSI, modern peristaltic hose pumps truly solve common problems due to their simplistic, easy-to-clean and maintain design.

Visit our website and use our peristaltic pump inquiry form pictured below which prompts you for all of the required information for us to provide a detailed proposal for your specific application.

Peristaltic PUmp Inquiry Form