ARI-Armaturen is presenting for the first time a double eccentric, metallic sealing High Performance-Valve: the new Zedox. It is a durable, energy-efficient valve with perfect handling and represents the economic alternative along with reliable tightness for high requirement applications. Together with the successfully established triple offset process-valve Zetrix and the standard butterfly valves Zesa, Gesa and Ziva – ARI provides an even more comprehensive butterfly valve portfolio.
In contrast to centric butterfly valves, the double eccentric sealing principle of the new Zedox (double shift of the pivot point) reduces the angle of the disc when it enters into contact with the seat sealing ring and relieves that metallic sealing when opening. By reducing the contact pressure and minimizing friction that way, Zedox offers a long service-life. The streamlined bearing and shape of the valve-disc stands for a high-energy efficiency. Its longer lifetime achieves Zedox also by protecting the seat sealing ring against negative medium flow influences. The low torques guarantee a perfect handling. Another advantage for example is the high functional safety even at challenging requirements. Zedox is reliably tight at temperatures from -40°C up to +260°C (max. 400°C with special design), for pressure classes PN 10 to PN 40 plus ANSI Class 150.
Zedox accomplishes leakage rate A acc. to EN 12266, API 598 (bi-directional), soft-sealing or rather alternative metallic-sealing with leakage rate B (optional rate A). The blowout proof shaft provides extra safety. The Zedox pressure/temperature rating follows company standard and EN 1092. Besides a Foresave certificate, an ATEX version is also available. The High Performance-Valve can be easily automated– when replacing the gearbox – by pneumatic, electrical or hydraulic actuators (actuation interface acc. ISO 5211).
The Zedox-Design is in compliance with EN 12516, PED and API 609. Available with weld ends (from DN 80 to DN 1600), double flanged (DN 80 to DN 1200) or wafer (DN 80 to 800), fulfilling the pressure classes PN 10 to PN 40 as well as Class 150. Materials are e.g. cast carbon steel 1.0619+N, SA216 grade WCB) and cast stainless steel (1.4408, SA351 grade CF8M). The manufacturer reports different versions and materials are available upon request. Zedox can be used for fluids, steam, gases and vapors.
The new Zedox fills the gap between the already existing centric soft sealing butterfly valves and the triple eccentric process valve. From now on, the ARI customers benefit from a complete butterfly valve portfolio underlining the manufacturer’s One-Stop-Shop approach. Zetrix – the process valve available in weld ends, double flanged and fully lug-type version up to Class 600, PN 63 and 100 from DN 80 – 600. Zedox – the high performance butterfly valve available in weld ends, double flanged and wafer-type version up to PN 40 and DN 80-800 (1600). Zesa/Gesa/Ziva – the economic centric butterfly valves – available in lug and wafer-type versions up to PN 16 and DN 25-500 (600).
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Force pilot operated solenoid valve
Pharma and Medicine
Globe valves are granted USP Class VI certification
The Gemü globe valves 507, 550 and 554 with stainless steel valve bodies and PTFE seals from the valve specialist Gemü have been awarded approval in accordance with USP Class VI. They now comply with the prerequisites for application in the medical and pharmaceutical industries.
The U.S. Food and Drug Administration (FDA) divides the plastics used in the medical and pharmaceutical industries into six biocompatibility classes in the American Drugs and Medicines Register (USP). The most stringent of the six categories is the USP Class VI classification. It is the prerequisite for use of the materials in the medical and pharmaceutical industries.
With immediate effect, the Gemü globe valves 507, 550 and 554 with PTFE gland packing (Gemü code 5P) and stainless steel valve bodies (Gemü code 37, 34 or C2) now have certification in accordance with USP Class VI and are therefore approved for use in the medical and pharmaceutical industries.
New Profinet fieldbus interface
Tried and tested and versatile
Gemü is now expanding its tried and tested Gemü 1436 cPos positioner to include additional options in fieldbus environments. With the new Profinet fieldbus interface, the Gemü 1436 cPos positioner achieves a transmission rate up to 8 x higher. However, the option to perform all setting options easily via the fieldbus interface instead of having to enter these locally on the operating unit remains unchanged. In this way, the process data for controlling the valve position is also transmitted digitally. The new fieldbus type with Profinet also offers other practical benefits for the user, such as a more stable connection and additional configuration options.
In addition to the “standard” versions with analogue signals (0/4…20 mA) and the already available DeviceNet versions and Profibus DP, the electro-pneumatic positioner is now also available with Profinet, the industrial Ethernet standard, which will increasingly become the established standard in the near future in the automation sector.
Gemü is therefore expanding its product range in the area of positioners for pneumatically operated equipment. To achieve the widest range of control tasks, the valve specialist now offers a complete product range of positioners. In doing so, the individual series each have specific features and characteristics whereby a balance must always be struck between wide-ranging functionality and cost/benefits.