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Frequently Asked Questions

Learn more on what Sterlitech Corporation has to offer. Find answers to your questions about our filtration products here!

Filter Holders and Accessories FAQ

<p>Solvent or acid filtration is not recommended, as such use could greatly reduce the lifetime of these funnels. </p>
<p><span>PES MF funnels can withstand&nbsp;multiple autoclave cycles at 121 - 123 &deg;C (250 -253 &deg;F) at 1.0 bar (100 kPa, 15 psi) for 15 - 20 min. Please remove the lid kits and stoppers before autoclaving.&nbsp;</span>Do NOT autoclave these funnels with aluminum foil.&nbsp;</p> <p><span> Repeated used of detergents may cause polyphenyl sulfone to crack, especially those containing polyoxyethylated alkyl phenols and alcohols, anti-corrosion, or anti-scaling boiler additives.&nbsp;</span></p>
<p><span data-sheets-value="{&quot;1&quot;:2,&quot;2&quot;:&quot;The membrane filter tweezers offered at https://www.sterlitech.com/stainless-steel-membrane-filter-tweezers-pad-tip-ends.html\u00a0are recommended for handling membrane filters to minimize the potential for contamination and damage.\u00a0 However, the tweezers are not mandatory and most membrane filters can be installed by hand. Gloves are recommended when handling membrane filters to avoid contamination with skin oils.\n\n&quot;}" data-sheets-userformat="{&quot;2&quot;:9089,&quot;3&quot;:{&quot;1&quot;:0},&quot;10&quot;:0,&quot;11&quot;:4,&quot;12&quot;:0,&quot;16&quot;:8}">The membrane filter tweezers offered at <a href="https://www.sterlitech.com/stainless-steel-membrane-filter-tweezers-pad-tip-ends.html" target="_blank">https://www.sterlitech.com/stainless-steel-membrane-filter-tweezers-pad-tip-ends.html</a>&nbsp;are recommended for handling membrane filters to minimize the potential for contamination and damage.&nbsp; However, the tweezers are not mandatory and most membrane filters can be installed by hand. Gloves are recommended when handling membrane filters to avoid contamination with skin oils.<br /><br /></span></p>

In the USA, these devices are considered exempt by the NRC and technically can be thrown in the trash when expired, however we prefer that they be returned to us and properly disposed of.  If a customer is throwing them in the regular trash, we ask that any radioactive wording or labelling be covered with black permanent marker to alleviate any unnecessary panic if the device is found.  Thus the reason we, and the majority of our customers prefer to return them to us.

In Canada, they are not considered exempt by the CNSC, and therefore would have to be returned to us for proper disposal.

Please contact us for the Return Shipping Instructions.

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