Stauff: Purer Oil for Injection Moulding Machines

Stauff: Purer Oil for Injection Moulding Machines

(Werdohl, Januar 2011)

Offline filters enhance oil purity

In principle, the subject matter only measures between one and three microns. That’s how fine the dirt particles are that can cause contamination in the hydraulic systems of injection moulding machines. Stefan Beez, sales engineer at Stauff: “The filters used on the machines are equipped with filter grades of between three and ten microns. This means that particle sizes of less than three microns can only be caught to a certain extent. But it is especially the concentration of ultra-fine particles that causes intense wear on the hydraulic components.” Because conventional filters that function in the main stream only remove particles up to three microns, a so-called offline filter with an integrated motor pump unit has been developed by Stauff. Using this offline filter system (OLS), practical tests carried out with a renowned operator of injection moulding machines showed significant improvements in the purity class according to ISO 4406, namely from 15/13/10 (pressure filtration three microns) to 14/11/8.

This result speaks in favour of Stauff’s strategy to back slow but highly effective filtration in the so-called bypass flow. With this technology, the fluid is drawn off the hydraulic system and passes through an ultrafine, purpose-developed cellulose medium that removes even the tiniest particles of less than one micron. The compact offline filter is easily installed in the hydraulic system of the machine and works independent of the plant cycle, even when the injection moulding machine is at a standstill. “The filter prolongs the service life of the oil and of the costly, sophisticated components,” explains Stefan Beez. “With the OLS, the purity of the oil is improved after only a few weeks and, due in particular to the increased availability of the installation, pays itself off within about six months.”

Find out further details on the Stauff easyfair stand No. C 01 at the MAINTENANCE 2011 trade fair taking place at Landschaftspark Duisburg North (Power Station) on 23 and 24 February.


easyFairs MAINTENANCE 2011
23 - 24 Feb. 2011
Stand C 01

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Picture 1:

Clean stuff: The offline filter system (OLS) by Stauff improves the purity of the hydraulic oil in injection moulding machines in only a few weeks, paying itself off in about six months due to increased availability of the hydraulic system.

(Walter Stauffenberg GmbH & Co. KG, 2011)

Background information

Walter Stauffenberg GmbH & Co. KG was founded in the 1950s in Werdohl, in the German province North Rhine-Westphalia, and was initially a contract turning shop. Today the company operates under the trade name STAUFF, developing, producing and marketing fluid technology components for use in plant construction and mechanical engineering. In the fields of tube, pipe and hose clamps, measuring technology and hydraulic filtration, this is one of the leading organisations in a growing branch of industry.

Meanwhile, almost 1100 employees all over the world (12/2010) generate an annual turnover of around EUR 160 million (12/2010). Distribution subsidiaries have recently been opened in Poland, Korea, Russia and Ireland. In addition to the group headquarters in Werdohl Ehrenfeld, the company has production and logistics facilities in Plettenberg-Ohle and Neuenrade-Küntrop.

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