Plastics Technology

JAN 2019

Plastics Technology - Dedicated to improving Plastics Processing.

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a long-time medical-tubing executive who now runs his own consulting company, Med1Extrusion. Says Alpert, "Bob has been at the forefront of a lot of developments in this area, but I've been bugging him awhile about things I felt were necessary improve- ments that needed to be made from the aspect of the user." Dubbed the Bessemer Rx-SmartMED Series, the new line includes water and vacuum tanks that will be available initially in 3-, 5-, and 8-ft lengths. The tanks will be built using 304-L stainless steel, with all contact surfaces electropolished to reduce formation of biofilms. To facilitate cleaning, the corners of the tank will be rounded, even on inside chamber bulkhead plates. All water- contact surfaces will be TIG welded, the preferred welding method for food and beverage applications. Threads exposed to the process water have been "almost completely" eliminated, says Bessemer, by the use of 316 stainless steel tri-clover fittings and valves. "These fittings and valves are a standard in the wine, beer, and dairy industries, but not for tanks that produce catheters for the heart and brain? That didn't make sense to us, so these will be standard on the Novatec tanks." QUESTIONS ABOUT MEDICAL TUBING? Visit the Pipe/Profile/Tubing and Medical Zones. In fact, Bessemer adds, he has seen cases over the last three years where a medical tubing processor bought a tank, only to disas- semble it and add tri-clover fittings on its own. Water input to the tank has been improved to allow proper water circulation while minimizing water turbulence. A new diffuser has been developed to improve the water entry. All threads have been removed from the rotary water-level device. The roller system has been designed without threads exposed to the process water while allowing external adjustment of roller height. The rollers can be mounted without need of tools and can be adjusted to either roll or be fixed, as needed. A reservoir system is designed for ease of draining/flushing, which is very common for medical tanks. This reservoir has been incorporated into the full-length splash tray, again with all rounded corners to ease cleaning. Situating the reservoir above the water pump is said to improve the speed of tank cleaning/ flushing. Notes Bessemer, "Typically, tapwater tanks have the water tested on a weekly, if not daily, basis. And tanks with deion- ized water are typically tested on a monthly basis. In either case, if they fail the water testing, the tanks must go through a bleaching/ chorine-flushing procedure. That is very time consuming, taking many hours to perform. In fact, this painfully slow process is even why some medical-tubing processors avoid vacuum systems, Siemens 7-in. HMI Integrated OD/ID Wall- Measurement Units (Optional) Electropolished Finish Designed for Easy Cleanout Rounded Corners Tri-Clover Fittings Sliding Reservoir Wireless Tablet (not shown) Easy-Clean Filters Vacuum or Cooling Tanks Tri-Clover Fittings Reservoirs Above Pumps Servo Linear Adjustments Stainless- Steel Frame New line of Bessemer Rx-SmartMED Series tanks (front and back views) for medical tubing include a range of new features. The tanks are built of 304-L stainless steel, with all contact surfaces electropolished to reduce biofilm formation. Tank corners are rounded, and all water-contact surfaces are TIG welded. "You can't get into this market in a meaningful way with a product line that is 'as good' as what's already out there.'" @plastechmag 11 Plastics Technology M E D I C A L T U B I N G

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