08 TECHNICAL INFORMATION | PRODUCT-SPECIFIC SECTION
Gas washing bottles
By distributing the gas through the liquid by use of a filter disk, the gas surface is significantly increased and the interchange between gas and medium is improved. DURAN® gas washing bottles also work reliably at high flow velocities. The graph illustrates the effectiveness of gas washing bottles with and without a gas filter disk.
Absorption efficiency of two gas wash bottles: A without gas filter and B with gas filter plate
Filtering flasks with side-arm socket or plastic hose connection
DURAN® filtering flasks are vacuum tight in accordance with DIN EN ISO 6556. Alongside the filtering flasks with glass hose connections, versions are also available with a side-arm socket or plastic hose connection. The ground side-arm socket with dimensions 17.5/26 is suitable for vacuum hoses from 15 to 18mm OD (e.g. 6 x 5 mm or 8 x 5 mm, DIN 12 865). The plastic hose connections are suitable for hoses of approx. 9mm internal diameter. The versions with side-arm socket or plastic hose connection offer improved safety for the user.
DURAN® SUPER DUTY
The new DURAN® SUPER DUTY articles have greater mechanical stability compared to standard DURAN® articles due to increased glass content. The reinforced rim also increases shock resistance and considerably reduces the risk of breakage. They provide maximum possible safety for users when working under mechanical load e.g. frequent cleaning. Uniform wall-thickness distribution, tried-and-tested DURAN® properties and increased shock resistance extend their service life and make DURAN® SUPER DUTY glass containers more economical. Recommendations Uniform and slow heating is recommended for the SUPER DUTY products to avoid thermal stresses in the glass. The standard DURAN® beakers and Erlenmeyer flasks should be used when working at very high temperatures or if rapid temperature changes are expected, as they are characterised by excellent resistance to temperature changes. However, the mechanical stability of these DURAN® products is limited compared to the SUPER DUTY product range.
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