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C-Flex EZ Top Container Closures

EZ Top container closures are one-piece units consisting of tubing and an overmolded stopper. Economical and designed for single use, these closures eliminate contamination that can occur with repeat-use closures and play a key role in the reduction of cleaning and assembly time.

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C-Flex EZ Top Container Closures

One-piece construction which employs a thermal bond between tubing and stopper eliminates product loss and contamination due to loose connections. EZ Top container closures are made from C-Flex pharmaceutical-grade resin and tubing to ensure an unobstructed fluid path and extremely low levels of extractables, and to provide an elastomeric seal against glass, plastic and metal surfaces. They are easily used with sterile connecting devices and thermal tubing sealers, and are autoclavable. Standard configurations fit a wide variety of glass, plastic and stainless steel containers, from 60mL vials to 20L carboys. EZ Top container closures are pre-packaged in units of 10. Containers are sold separately. Caps are also sold separately (in units of 10) and are specifically designed for use with EZ Top container closures. Custom designs for port configurations, tubing dimensions, materials, sizes and packaging are available upon request.

  • Economical single-use closures reduce cleaning and assembly time
  • Eliminates contamination issues with repeat-use closures
  • Provides elastomeric seal against glass, plastic and metal surfaces
  • Made from C-Flex¨ pharmaceutical-grade resin and tubing
  • Integral one-piece design eliminates product loss and contamination
  • Unobstructed fluid path
  • Extremely low levels of extractables
  • Custom options available upon request


  • Glass and plastic carboys
  • Solution and media bottles
  • Stainless steel vessels
  • Laboratory equipment and apparatus
  • Experimental procedures
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At Liquidyne, we prioritize our commitment to quality and consistency. In 2017 we achieved ISO 9001:2015 Quality Management System certification to ensure we can repeatedly deliver consistently high-quality products and solutions. Being an ISO 9001 facility, together with our USP Class VI Testing, ASME Bioprocessing Equipment (BPE), and EHEDG certification guarantee, we have the methodologies to assure quality. We will quickly and accurately rectify any issues if any of our products are ever in non-conformance.

img ‰ files/ISO_9001_Quality_Management_System_Certified.png ¶ url ‰ iso-certificate ¶ cta ‰ View Certificate ¶ txt ‰ At Liquidyne, we prioritize our commitment to quality and consistency. In 2017 we achieved ISO 9001:2015 Quality Management System certification to ensure we can repeatedly deliver consistently high-quality products and solutions. Being an ISO 9001 facility, together with our USP Class VI Testing, ASME Bioprocessing Equipment (BPE), and EHEDG certification guarantee, we have the methodologies to assure quality. We will quickly and accurately rectify any issues if any of our products are ever in non-conformance. ¶
Testimonial from Process Development Manager

"Thanks so much! What a quick turn around. It is a pleasure working with Liquidyne."

Process Development Manager

Testimonial from Vice President, Analytical Development and Manufacturing

"I received the cart yesterday, thanks for the fast delivery! It feels sturdy. I sat on it. It does not bounce. It is also easy to clean and wipe or wash down."

Vice President, Analytical Development and Manufacturing

Testimonial from Chemical Engineer

"Thanks again for reacting so quickly and meeting me halfway with the element. We will be able to get installed and have things keep moving overnight with the night crew. The little things like this are always greatly appreciated when working with Liquidyne."

Chemical Engineer

Testimonial from VP Antibody Manufacturing

“This pump cut our processing time from 3 days to 1 shift. I’m not giving this pump back. You will have to come and get it if you want it... and that won’t likely happen.”

VP Antibody Manufacturing

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