This website uses cookies primarily for visitor analytics. Certain pages will ask you to fill in contact details to receive additional information. On these pages you have the option of having the site log your details for future visits. Indicating you want the site to remember your details will place a cookie on your device. To view our full cookie policy, please click here. You can also view it at any time by going to our Contact Us page.

Gear pump offers a sweet solution for fluids containing crystals

28 July 2018

A recent addition to the Viking Universal seal pump range, available through Michael Smith Engineers, features a modified ribbed/stepped idler gear design – specially developed for sugar processing – but is also suited to other applications where there are crystals in the pumped fluid.  

By removing 0.9mm (or 900 microns) of material from 80% of the flank of each idler gear tooth on both sides results in reduced gear-to-gear contact that could damage tiny sugar crystals or other solids in the pumped fluid.

Available in either hardened iron or hardened steel, the ribbed idler alternates position on each tooth to minimise wear on the rotor teeth in any given spot and since the idler turns at a different speed than the rotor, the contact point changes with each revolution of the rotor gear. This creates additional ‘slip paths’ that allow liquids to slip back from the high pressure (discharge) side of the pump to the low pressure (inlet side), the amount of which depends on the viscosity of the pumped liquid.

The pumps capacity on high viscosity liquids using ribbed idlers is almost the same as the performance of pumps which have standard (non-ribbed) idler gears. For example, on liquids with a viscosity of 10,000 cSt operating at 50 rpm, the capacity is reduced by only about 1% compared to the standard pump performance at 3.5 Bar g, 7 Bar g and 10 Bar g.

By changing the idler gear from a standard to a ribbed idler and slowing it to appropriate speeds, users have the flexibility and convenience of using the same pump for liquids containing sensitive solids or for pumping other liquids such as syrups and molasses by switching back to a standard idler gear. This offers the potential to cover all positive displacement pumping needs with one or two sizes of the same pump, helping to simplify plant operations and maintenance, while increasing reliability and uptime.


Contact Details and Archive...

Print this page | E-mail this page

MOST VIEWED...


Article image How to deliver assured air quality for production sensitive sites

Gareth Topping, Business Line Director EMEAI at Gardner Denver, explains how to deliver assured air quality for production sensitive environments, and why there needs to be a greater focus on exhaust air from vacuum pumps. Full Story...

Article image What role does refrigeration play in the supply chain?

Controlling the temperature of food across the whole supply chain is vital to extend shelf life. But how much can be gained by food manufacturers through careful monitoring at all process stages?Full Story...

A recipe for continuous improvement success

Hygienic drainage for food safety

Owning your hygiene culture