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Here you'll find frequently asked questions about DURAN® glassware for manipulators.
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What is the difference between "finished" cones and sockets and "diamond-ground"?
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Finished - reduced surfaced roughness, corresponds to: finer grinding quality.
Diamond-ground - higher surfaced roughness, corresponds to: coarser grinding quality.
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At what angle can ground spherical joints, be mounted?
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According to standards, no more than 5 degrees.
From experience and dependent upon dimensions, an angle of 10 to 15 degrees is possible.Category: Weiterverarbeiterartikel -
Have RODAVISS® screw caps a GL thread?
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No, they have a special thread.
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Are caps and seals available for SVL screwthread tubes?
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No, we only supply accessories for the GL version.
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Can individual glass parts be ordered for PRODURAN® valves?
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Yes, however, the positioning of the valve pin is to be checked and, if necessary, reset.
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Can individual PRODURAN® valves be ordered for the valve pins?
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Yes, however, the valve position is to be checked and, if necessary, reset.
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Can individual glass parts or valve pins be ordered individually for GU valves?
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No.
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Are filter discs also available in intermediate sizes?
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Yes, but the prices depend on dimensions, porosity and requirement quantity.
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Is the side burette stopcock key with side entry (art. no. 28 603550) useable for KB certified burettes?
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No as the tip must be specially needled.
This is important for the flow time!Category: Weiterverarbeiterartikel

Patrick Dorner
Sales Glassware for manipulators
Phone: +49 (0)9342 – 802 214
Fax: +49 (0)9342 – 802 250
glassblowers@dwk.com