cpp – Process technology for the chemical industry 01.2019

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cpp SAFETY, SECURITY Enclosed filter system with protective bag Cleanliness and safety in hazardous areas The Wolftechnik QP-Quick-Pack is a special filter unit with a protective bag that offers a number of advantages with regard to product quality, servicing and maintenance. It is designed for quick filter changes and reduced downtime. Both the filter and the housing meet the requirements of Atex Directive 2014/34/EU for use in potentially explosive atmospheres. The QP-Quick-Pack filter system from Wolftechnik is suitable for all applications where an enclosed, ready-to-use unit is preferred for reasons of cleanliness, hygiene and toxicity. QP-Quick-Packs are installed in matching WTQP stainless steel housings and sealed with special unions at the inlet and outlet ports. They bear the Ex II 2GD mark, which certifies that the filter systems meet the requirements of Atex Directive 2014/34/EU for use in potentially explosive atmospheres (hazardous areas). They are also approved for processing products containing solvents. The QP-Quick-Pack filter system consists of a sturdy PP adapter with a manifold, inlet and outlet ports and a double-layered protective bag containing the filter cartridges. QP-Quick-Packs are available with 1, 3 or 7 filter elements and in lengths from 5” to 30”. Various filter elements are possible. The design offers special advantages in terms of product quality. As the protective bag prevents direct contact between the liquid to be filtered and the housing, there is no contamination of the latter. This also eliminates the risk of cross-contamination between different product series due to residual deposits in the filter housing. At the same time, the filter system provides greater safety for workers as direct contact with the medium is avoided during filter changes and servicing. In addition, there is no need for time-consuming cleaning of the housing. The filter is changed simply by removing the spent QP-Quick-Pack filter system from the housing and inserting a new one – that’s all! Pictures: Wolftechnik QP-Quick-Pack filter cartridges with a protective bag Preventing electrostatic discharge If the QP-Quick-Pack is used in hazardous areas, the Technical Rules for Industrial Safety and Health (TRBS) must be observed regarding electrostatic charging of components. Such charges are also known as electrical potential differences and are generally caused by friction. Under certain circumstances, electrostatic discharge might cause sparks that can ignite substances and cause an explosion. That is why the installation and operation of mechanical devices in hazardous areas are subject to stringent safety regulations. To prevent electrostatic discharge at the filter system while changing, servicing or inspecting the filter, users have to make sure that the bottom part and the cover of the WTQP housing are properly earthed at their earth tabs. Friction, and thus static electricity, might also occur when the liquid flows 34 cpp 01-2019
Technical data of the QP-Quick-Pack filter cartridge Installation diagram – WTQP housing for a QP-Quick-Pack with a purging bypass through the housing. With conventional filter cartridges, this electrostatic charge of the filter medium is discharged through the housing. The protective bag of the QP- Quick-Pack, however, insulates the filter medium from the housing. To prevent excessive charging, it is made from conductive polyethylene or polyamide. Before opening the housing, adequate relaxation time must be allowed in order to dissipate the charge. This is the time required for a system to achieve a near-equilibrium state. In the case of the filter, it is the time after which the electrostatic charge is fully dissipated. The relaxation time is determined by the conductivity of the medium and varies greatly from one liquid to another. For solventbased paints and varnishes, for instance, Wolftechnik recommends waiting 20 to 30 seconds before opening the housing. www.cpp-net.com Online search: cpp0119wolftechnik AUTHOR: PETER KRAUSE Managing Director, Wolftechnik PATENTED MULTI-TASKING The FreDrive-Production uses 5 differents milling heads for a powerful and economic size reduction COG MAKES ITS MARK: Special solutions and services beyond the ordinary. WE ARE IN HALL 1 / BOOTH 1-343 POWTECH 2019 IN NÜRNBERG / GERMANY FROM 09 - 11 APRIL 2019 WE CARE ABOUT MILLING WWW.FREWITT.COM Customised services for the design and implementation of first-class sealing solutions. 01.-05.04.2019 Visit us in: Hall 5, Booth A13 Hannover, Germany Proven expertise – New location! cpp www.COG.de/en 01-2019 35
Page 1 and 2: 01-2019 16 COVER EXPLOSION SAFETY I
Page 3 and 4: cpp EDITORIAL Industrie Spotlight H
Page 5 and 6: 44 At this year’s Hannover Messe
Page 7 and 8: Picture: Siemens Modular production
Page 9 and 10: Easy access to live data around the
Page 11 and 12: High flexibility “It was also cru
Page 13 and 14: GLASS FILTERS High quality material
Page 15 and 16: The ContiTDS is set up outside of t
Page 17 and 18: The Q-Ball E is a flameless explosi
Page 23 and 24: cpp SPECIAL Safe transport of BHET
Page 25 and 26: ComVac, Hannover April 1 - 5, 2019
Page 27 and 28: The effective way to suppress explo
Page 29 and 30: The compact, flow-optimised tube bu
Page 31 and 32: ® Innovations for heating Flexible
Page 33: The ZR VSD+ compressors compress th
Page 37 and 38: An integrated OPC UA connection is
Page 39 and 40: These pluggable modules offer segme
Page 41 and 42: operated both fully automatically a
Page 43 and 44: Typical compressor map: electric ac
Page 45 and 46: Picture: Siemens Siemens has expand
Page 47 and 48: Profinet data in OPC UA Picture: Pr
Page 49 and 50: IO-Link master modules in IP 20 and
Page 51 and 52: IN A NUTSHELL: FEATURES AND BENEFIT
Page 53 and 54: monitored throughout the process. T
Page 55 and 56: need to be replaced after 15,000 op
Page 57 and 58: clude resistance to temperatures be
Page 59 and 60: cpp PRODUCTS Turnaround concept red
Page 61 and 62: limiting protective devices like a
Page 63 and 64: & robust Pumps powerful www.jesspum

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