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Item Information   Holdings       More by this author     Schlais, John H.     Subjects     Thermoplastics     Valves and valve gears -- Design and construction     Manufacturing processes     MSE Project.     Browse Catalog     by author:      Schlais, John H.       by title:      Cost reduction of Te...         MARC Display

Cost reduction of Teflon coated brass valve-piston utilizing alternate materials and manufacturing processes / by John H. Schlais by Schlais, John H. Subjects Thermoplastics   Valves and valve gears -- Design and construction   Manufacturing processes   MSE Project. Description:  52 leaves : ill. ; 29 cm. Contents:  Advisor: W. Edward Howard. Committee members: Dr. Joseph Musto, Paul Unangst. Introduction -- Investigation Methodology -- Development History -- Material Search -- Design Considerations -- Estimated Cost and Savings -- Prototyping and Testing -- Other Issues -- Conclusions -- Recommendations -- References -- Appendix A) Summary of historical test results B) Design checklist C) Test protocol Objective: The Teflon coated, machined brass, piston is one of the most critical components in Pentair Water Treatment's water softener and filter control valves. It is also one of the most costly to manufacture. The objective of this project is to identify all the important properties and requirements the piston must meet, research alternative materials and processes that meet those requirements, and identify which might be less costly to procure and manufacture. Methodology: A design checklist was created, which specifies the critical characteristicsof the valve piston. The list defines physical, mechanical, environmental, and regulatory agency requirements. These specifications are guidelines for searching for alternate materials and manufacturing methods. Initial material research was done utilizing the Internet, Pentair's component suppliers, and material suppliers. Manufacturing methods available for different material choices will also be researched using the same resources. Material choices were narrowed down to those that best fit the critical characteristics. Manufactured costs were estimated. Finally, prototype pistons are to be made of materials, and functional testing conducted to evaluate performance. Major findings: The best candidate materials are thermoplastics, which offered the widest range of material properties, economical cost, and more than one economical manufacturing method. The manufacturing method best fitting the requirements is machining.   Copy/Holding information Location Collection Call No. Status   Walter Schroeder Library Master's Theses AC805 .S33 2001 Available Add Copy to MyList Format: HTMLPlain textDelimited Subject:   Email to:

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