Page 28 - Shroeder - Filter Systems

Removal of Particulate Contamination

Goal of ■ Achieve a residual contaminant value of a maximum of 9 mg/camshaft
Optimizing the ■ Cleanliness of washing fluid of < 30 mg/liter
Cleaning Line ■ Extend the service life of washing fluid, i.e. save costs associated with changing the fluid
■ Prevent clogging of the tank, e.g. save cleaning time
■ For process reliability reasons, a low-maintenance cleaning system was to result which enabled
the camshafts to be cleaned to a residual contaminant content of 9 mg/component, this to be
done cost-effectively.

Result of The service life of the cleaning fluid was extended from 1 week to 8 weeks. There was no more clogging of
Optimization the tank. Changing the bath fluid was done on account of the increased chloride content, not on account
of contamination.
The residual contaminant values of max. 9 mg/camshaft and max. 30 mg/liter of bath fluid
(when using a 5-µm membrane for analysis) were achieved and maintained at this level.
By optimizing the fluid maintenance of this washing line, an improvement in quality was achieved
at no added cost and without comprising process reliability.
This example shows that prior to any such optimization or in new facilities the cleanliness of the
components upstream of the system, throughput, technical details, targets have to be known and defined,
for only in this way can the success of such an endeavor be ensured.

Economic Investment Recurring Costs Savings/Year
Efficiency ($) ($) ($)
Analysis Off-line Filtration 5,000.00
Filtration Costs 7,500.00
Extension of the Service 10,000.00
Life of the Bath
Lower Reworking Costs These costs can’t be quoted.
Down Time of the Washing These costs can’t be quoted.
Machine for Cleaning

26 SCHROEDER INDUSTRIES