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SPI Supplies® Brand PTFE Beaker Covers and Watch Glasses

Use these non-breakable and chemical inert item instead of glass for safety


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Overview:
All SPI Supplies Brand PTFE beaker covers, which can also be used as watch glasses, are chemically inert, non-contaminating, and are thermally stable in the range of -200°C (390°F) to + 280°C (+536°F). The beaker covers also have a "super smooth" finish making it virtually impossible for anything to "stick" to the surface of these fine laboratory products, making them very easy to clean up for reuse in another experiment. They are especially useful during digestion procedures where it is important to contain the liquid in the beaker. Make sure you understand why we can no longer call these Teflon® beaker covers and must refer to them only as PTFE beaker covers.

Details of the manufacturing:
The beaker covers are pressed from pure virgin PTFE resulting in a highly inert material, one that will stand up to nearly every way one might want to use it. The super smooth finish means that virtually nothing will really stick to the covers.

Cautions about over heating:
PTFE beakers can not be taken to temperatures as high as glass. The user has to be sure they do not overheat PTFE beakers or their covers. If PTFE is overheated, especially in air, it can start to break down by both thermal decomposition and oxidation, resulting in fumes of HF which should not be inhaled under any circumstances.

Available sizes:
Cover diameter (mm)Fits beaker (ml)SPI #Each10+, EachIn Stock
20 1 01968-AB $2.86 $2.57 Add to cartYes
30 5-10 01969-AB 3.21 2.89 Add to cartYes
40 25 01970-AB 3.57 3.21 Add to cartNo
50 50 01971-AB 4.25 3.83 Add to cartYes
65 100 01972-AB 5.68 5.11 Add to cartYes
75 150 01973-AB 6.43 5.79 Add to cartYes
80 250 01974-AB 7.82 7.04 Add to cartYes
100 400-500 01975-AB 10.32 9.29 Add to cartYes
125 600-1000 01976-AB 13.89 12.50 Add to cartYes
150 2000 01977-AB 17.45 15.71 Add to cartYes
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Saturday July 04, 2009
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