cpp - Process technology for the chemical industry 02.2018

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cpp ACHEMA PUMPS Let’s get back to the rotors. What kinds of design are available? Hahn: We equip our pumps with axial or semi-axial rotors, which are also called centrifugal rotors, depending on the customer’s needs. When is which kind of rotor used? Hahn: We recommend axial rotors for applications where a high delivery rate is desired. Semi-axial rotors are preferred whenever the medium needs to be conveyed over long distances at high pressure or if it has to overcome a big difference in height. In which materials does Flux offer its 400 series drum and container pumps? Hahn: That depends firstly on their resistance to the media to be conveyed and secondly on whether the pumps will be operated in explosion hazard areas. The spectrum of possible materials for components that come into contact with the product ranges from polypropylene or polyvinylidene fluoride to aluminium and stainless steel or Hastelloy C. The F/FP 430 vertical pump with a mechanical seal can be quickly disassembled into interior and exterior pipes Are all pumps approved for use in explosion hazard areas? Hahn: No. The F/FP 427 hygiene pump, which can be fully disassembled, and all plastic pumps like the F 430 PP 100/50 container pump, which is made of polypropylene, must not be used in explosion hazard areas. Apart from these, all other pumps in the 400 series and made of stainless steel or Hastelloy C have Atex approval. Not even the best pumps can function without a drive. What options does Flux offer for the 400 series? Hahn: Depending on the customer’s needs, the pumps either have an electric or a pneumatic drive. Of course, the highest demand is for electric drives and above all commutator motors. Which Flux also manufactures in-house. Hahn: That’s right. We manufacture them ourselves here in Maulbronn. Why does the company make its own motors? Hahn: For quality and flexibility reasons. Our customers value the high quality of our products. By manufacturing our own commutator motors and implementing our own accompanying quality man - agement system, we can keep a handle on quality ourselves. In addition, we can react very flexibly to different country-specific requirements with respect to the voltage and frequency at which the motors can be operated. Jürgen Rabenseifner: By producing our own motors, we’re better able to react to customer requirements. I’m thinking of one case we recently handled for customers from the Middle East. They were looking for an explosion protected pump unit that could be operat - ed up to an ambient temperature of +60 °C. The Atex approval only covers a temperature range up to +40 °C. With this requirement in mind, we developed our explosion protected F 460 Ex commutator motor to handle the desired ambient temperature. Then we had PTB certify the entire pump unit, consisting of the F 460 Ex HT motor and the sealless F/FP 424 (HT) pump, in accordance with Atex requirements. The 400 series also includes so-called pump sets. Mr. Raben - seifner, what are these sets exactly? Rabenseifner: They’re pre-configured units consisting of a pump, motor, hose and pump nozzle. They offer two major advantages for In the polypropylene version of the F 430, a heart of steel in the inner pipe compensates temperature fluctuations, ensuring that the mechanical seal remains tight users: We tailor all the components to the medium to be conveyed as well as to the application. Secondly, these units can be put into operation immediately. Could you describe a typical example of how a 400 series drum and container pump is used in the chemical industry? Rabenseifner: That’s quite difficult because these pumps are used in such a wide range of applications in that industry every day. One frequent use is delivering hazardous materials such as amines to a tank, then filling them into holding tanks. The FP 425 Ex S with a non-return valve is used for this purpose, for example. In conjunct - ion with a flow meter, an overfill protection device and appropriate emission control equipment we can create a semi-automatic filling system that fulfils the highest safety requirements. www.cpp-net.com Online search: cpp0218flux Hall 8.0, Booth E10 THE INTERVIEW WAS CONDUCTED BY: LUKAS LEHMANN Assistant Editor-in-Chief 62 cpp 02-2018
Industrie The network of expertise for industry 18 media brands for all major sectors of industry Information, inspiration and networking for professionals and industry executives Practical knowledge spanning all media channels: Trade journals, websites, newsletters, whitepapers, webinars, events Your qualified partner for future topics of industry Discover the appropriate media for you and your specific industry sector: konradin.de/industrie media.industrie.de cpp 02-2018 63
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02-2018 ACHEMA TRADE FAIR ISSUE 42
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cpp EDITORIAL BUNGARTZ MASTERPIECES
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cpp - Process technology for the chemical industry 02.2018

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