{"id":62198,"date":"2026-05-05T12:49:08","date_gmt":"2026-05-05T10:49:08","guid":{"rendered":"https:\/\/lvl-technologies.com\/?page_id=62198"},"modified":"2026-05-11T13:00:45","modified_gmt":"2026-05-11T11:00:45","slug":"safe-closure-systems-faq","status":"publish","type":"page","link":"https:\/\/lvl-technologies.com\/en\/safe-closure-systems-faq\/","title":{"rendered":"SAFE\u00ae Closure Systems FAQ"},"content":{"rendered":"

[vc_row][vc_column][vc_empty_space][vc_custom_heading text=”SAFE\u00ae Closure Systems FAQ \u2013
\nSealing, Thread Types & Automation” font_container=”tag:h1|text_align:left|color:%23009fe3″ use_theme_fonts=”yes” css=””][vc_empty_space][vc_column_text css=””]SAFE\u00ae closure systems<\/a> from LVL technologies are safety-critical components for 2D tubes, used in cryogenic storage, biobanking, diagnostics, and laboratory automation. This FAQ addresses key questions on sealing, internal vs. external threads, screw caps, push caps, and manual, semi-automatic, or fully automated capper\/decapper systems.<\/p>\n

Selecting the appropriate closure system significantly impacts the sealing performance, contamination control, and process stability of SAFE\u00ae 2D tubes<\/a>. For applications down to \u2212196 \u00b0C, validated screw caps with defined torque and axial TPE sealing are used. This ensures reproducible compression, stable cryogenic properties, and reliable integration into automated workflows.<\/p>\n

In high-throughput environments, properly matched SAFE\u00ae closure systems reduce manual intervention, minimize interface risks, and contribute to reliable, digitally traceable sample management.[\/vc_column_text][vc_empty_space][\/vc_column][\/vc_row][vc_row][vc_column][vc_custom_heading text=”Thread Types & Closure Variants” font_container=”tag:h2|text_align:left|color:%23363636″ use_theme_fonts=”yes” css=””][vc_empty_space][vc_tta_accordion section_title_tag=”h3″ style=”flat” color=”blue” spacing=”5″ c_position=”left” active_section=”” no_fill=”true” collapsible_all=”true” faq_schema=”yes” el_class=”gf-faq-schema”][vc_tta_section title=”What is the difference between internal and external thread tubes?” tab_id=”1777974625852-7f8cecdb-7109″][vc_column_text css=””]Internal-thread tubes have the thread inside the tube, with the screw cap engaging internally.<\/p>\n

External-thread tubes have the thread on the outside of the tube body.<\/p>\n

External threads reduce the risk of sample liquid entering the thread area, minimizing carryover and thread contamination, especially during repeated opening or cryogenic applications.[\/vc_column_text][\/vc_tta_section][vc_tta_section title=”When should internal vs. external threads be chosen?” tab_id=”1777974625866-a316867e-ab1c”][vc_column_text css=””]External-thread 2D tubes are ideal for cryogenic storage and applications requiring high contamination control, such as biobanking or GMP-like environments.<\/p>\n

Internal-thread tubes can be used in standardized automation environments if contamination and cryo-stability requirements are met.[\/vc_column_text][\/vc_tta_section][vc_tta_section title=”What are screw caps on 2D tubes?” tab_id=”1777974723708-c9d46b6d-d2b7″][vc_column_text css=””]Screw caps<\/a> are threaded closures applied with defined torque.<\/p>\n

Controlled torque ensures reproducible compression and consistent sealing.<\/p>\n

The sealing performance of SAFE\u00ae systems has been validated at 7 Ncm (SBS 96) and 15 Ncm (SBS 48 and 24).[\/vc_column_text][\/vc_tta_section][vc_tta_section title=”What are push caps and what are they used for?” tab_id=”1777977803617-9a748636-1b10″][vc_column_text css=””]Push caps<\/a> are snap-fit closures without a screw mechanism.<\/p>\n

They allow quick manual capping and are suitable for frequent-access applications with lower cryogenic requirements.<\/p>\n

For long-term LN\u2082 applications, screw caps with defined torque are recommended.[\/vc_column_text][\/vc_tta_section][\/vc_tta_accordion][vc_empty_space][\/vc_column][\/vc_row][vc_row][vc_column][vc_custom_heading text=”Sealing & Cryo-Stability” font_container=”tag:h2|text_align:left|color:%23363636″ use_theme_fonts=”yes” css=””][vc_empty_space][vc_tta_accordion section_title_tag=”h3″ style=”flat” color=”blue” spacing=”5″ c_position=”left” active_section=”” no_fill=”true” collapsible_all=”true” faq_schema=”yes” el_class=”gf-faq-schema”][vc_tta_section title=”How is sealing ensured in SAFE\u00ae closure systems?” tab_id=”1777974813047-88f86172-5f03″][vc_column_text css=””]SAFE\u00ae closure systems use an axial TPE sealing concept.<\/p>\n

O-rings are deliberately not used, as elastomeric seals can lose elasticity or develop compression set under cryogenic conditions.<\/p>\n

The axial seal generates defined compression without additional sealing components.[\/vc_column_text][\/vc_tta_section][vc_tta_section title=”Why is reliable sealing at \u2212196 \u00b0C critical?” tab_id=”1777974813064-09d0cc34-1e4c”][vc_column_text css=””]Cryogenic temperatures cause material contraction.<\/p>\n

A technically matched closure system ensures that defined compression is maintained at \u2212196 \u00b0C, preventing micro-leaks.<\/p>\n

Validation tests confirmed no nitrogen ingress after 168 hours of LN\u2082 vapor exposure.[\/vc_column_text][\/vc_tta_section][vc_tta_section title=”Can closure systems reduce cross-contamination?” tab_id=”1777974813088-3b3c0608-78c3″][vc_column_text css=””]External-thread systems reduce the risk of sample liquid contacting the threads.<\/p>\n

Combined with reproducible capping and automated handling, this further minimizes carryover effects.[\/vc_column_text][\/vc_tta_section][\/vc_tta_accordion][vc_empty_space][\/vc_column][\/vc_row][vc_row][vc_column][vc_custom_heading text=”Capper & Decapper \u2013 Manual to Fully Automated” font_container=”tag:h2|text_align:left|color:%23363636″ use_theme_fonts=”yes” css=””][vc_empty_space][vc_tta_accordion section_title_tag=”h3″ style=”flat” color=”blue” spacing=”5″ c_position=”left” active_section=”” no_fill=”true” collapsible_all=”true” faq_schema=”yes” el_class=”gf-faq-schema”][vc_tta_section title=”What types of capper and decapper systems are available?” tab_id=”1777974906717-e31918ff-5c9″][vc_column_text css=””]SAFE\u00ae capper and decapper systems are available as manual, semi-automatic, and fully automated variants.<\/p>\n

Depending on the system, single tubes or entire SBS racks (24-, 48-, or 96-position) can be opened or closed simultaneously.[\/vc_column_text][\/vc_tta_section][vc_tta_section title=”What are the advantages of multi-channel capper systems?” tab_id=”1777974906772-82358236-5bab”][vc_column_text css=””]Multi-channel cappers allow parallel capping of multiple tubes.<\/p>\n

Benefits include:<\/p>\n