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Fri Jul 20 2018
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CREATIVE SOLUTION SOLVES CLEAN IN PLACE PUMP SERVICE LIFE ISSUE

12-01-2017
by 
in 
The original valve cages (left) were wearing out far too quickly. The new high-performance valve cages (right) were a welcome solution

Sometimes parts that are providing reliable, long-lasting service can suddenly begin to fail when conditions change. Such was the case recently for leading Queensland food and beverage industry pumps and cleaning systems provider Euro Pumps, who needed to raise the temperature from 55 to 75℃ at an abattoir.

The abattoir had recently varied its livestock mix, and the 20° increase in temperature was necessary to cope with changes in fat and blood adhesion and soiling on production-line equipment. The increase in temperature was effective in cleaning the production line equipment, but it caused an unexpected side-effect – the nylon-cased clean in place (CIP) pump valves began to fail incredibly quickly.

The initial solution attempt was to custom manufacture new valve cages from stainless steel, which brought about other issues causing the stainless-steel springs to break and fail.  Further investigations showed that the spring breakage was attributed to the stainless steel binding on stainless steel, so the solution was electro-coat the springs. However, this did not prove to be a long-lasting solution as the coating quickly wore off. 

A suggested anti-seize type compound was not an option due to the hot (75˚C), high-pressure (100bar) water flowing through the system.  By this time the customer was getting anxious and the problem needed to be solved quickly.

Euro Pumps Product Development Manager, Joanne Field says they were stumped, until they asked Cut To Size Plastics for some help. “I called Cut To Size’s Technical Sales Representative, Campbell Parminter, who immediately started thinking outside the box,” she said. 

“After examination of the original cages, material identification and a check for chemical compatibility with common additives to water, Cut To Size identified that the failure was due to accelerated chemical degradation due to the elevated heat in a chemical environment - and not just heat, as was first suggested,” she explained.

Cut To Size recommended a special high-performance polymer to solve the problem. This test polymer was highly successful and has passed a standard service life test of 1000 hours. Further testing is still under way and both parties are expecting it to far exceed the standard 1000 hours.

“The solution was a great example of how teamwork between suppliers and customers can yield outstanding results. Before we contacted Cut To Size, some of these pumps were wearing out in as little as one week and our clients need a much more reliable performance than that. Campbell and I enjoy working together on solving problems,” said Joanne Field.

“Now they’re not only lasting the industry standard, but we are aiming to well exceed it, pending the results of further testing,” she said.

Campbell Parminter is happy with the success of the solution, which he hopes will further cement Cut To Size’s relationship with Euro Pumps. “Our attitude is always to find the best way to solve our customer’s problems, we listen and ask questions – we never put a project in the ‘too hard basket’,” he said.

Cut To Size Plastics
02 9681 0400
www.cuttosize.com.au

 

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