Up Time Magazine- June/July 2008

Figure 2 - Teﬂon® Cable in Suction Roll The aluminum back shell used inside this seal tight boot style connector was placed there to provide a rigid core for the boot to be fitted over. Unfortunately, the caustic soda solution has leaked around the boot and caused the aluminum to corrode and actually expand. This expansion weakened the boot, and total failure of the accelerometer and connector interface occurred. application for ruggedness and chemical compatibility. Notice how well the Teflon jacketed cable has held up in the suction roll in Figure 2 compared to the inside surface of the roller and connector boot on the accelerometer in Figure 1. The Teflon jacketed cable still looks like new. Although cables with PVC jackets have good chemical resistance to caustic soda solutions, they are not as rugged as Teflon®. Polyurethane jacketed cables would not be recommended for an environment of caustic soda. Sealing Gasket Insert with Sockets Back Shell Figure 5 – MIL Style with Locking Ring Wet End Connectors for Paper Mills Connectors used for industrial vibration analysis and monitoring must be compatible with the MIL C 5015 standard relative to fit, form, and function. However, in the wet end of a paper mill, the standard MIL C 5015 aluminum cable connector, as shown in Figure 3, would be the absolute worst choice. Seal Tight Boot Insert with Sockets Back Shell Figure 6 – MIL Style with Sealing Boot Figure 3 – MIL C 5015 Standard Military Speciﬁed Cable Connector Recommended connectors used for MIL C 5015 compatibility for vibration applications in a paper mill typically have 3 or 4 parts as shown in Figures 5 and 6. Each of these parts needs to be chemically resistant to the caustic soda solution. Typical connector materials other than aluminum, found in the standard MIL 5015 C cable connector, are 316 Stainless Steel, Delrin, Nylon, Polycarbonate, Polyurethane, Silicone, and Viton. Out of all these common connector materials, only 316 Stainless Steel and Silicone offer excellent chemical resistance for caustic soda solutions. Although connectors are available in 316 Stainless Steel, they are very expensive and can have a higher cost than the The caustic soda solution rapidly attacks aluminum parts and causes extensive corrosion. Figure 4 is a good example of using aluminum in a connector on the wet end of a paper machine. Figure 4 – Aluminum Core Connector www.uptimemagazine.com 63 http://www.reliability.com.au/sapimplementation http://www.reliability.com.au/sapimplementation http://www.uptimemagazine.com

Table of Contents Feed for the Digital Edition of Up Time Magazine- June/July 2008

Up Time Magazine- June/July 2008 Contents Upfront Upclose: The True Cause of Most Machine Failures Information Technology: Finding Future Perfect Lubrication: Building an Oil Analysis Winner Maintenance Management: Hidden Ways to Increase Safety Infrared: Air Barriers Lower Energy Costs, Increase Profits Motor Testing: Efficient Motor Repair, Part Deux Precision Maintenance: Good Maintenance, Smart Maintenance Reliability: Common Errors in Root Cause Analysis Ultrasound: Avoid the Baghouse Blues Vibration: Don't Let Your Sensors Get Eaten Alive Upgrade: Lining It All Up

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