Single-Use Assemblies

ESI Ultrapure, a division of ESI Technologies Group, is a leading supplier of single use assemblies / single use bag assemblies for the bio-pharmaceutical industries in Ireland and the UK. We make custom single use assemblies in our ISO Certified cleanrooms to meet your specific process requirements and quality standards.

We are committed to providing the best customer service, starting from concept stage to after-sales support. Our approach is Open Architecture, so we build to your specification without bias. We also ensure the fastest turnaround on enquiries, small minimum order quantities and short lead times.

Our ISO Class 7 Cleanrooms have been independently tested and certified in accordance with the ISO 14644 series of standards. Similarly, our Quality Management System is independently inspected and certified to ISO9001:2015.

To ensure full compliance with customer specifications we have completed dose mapping and sterility program validations in line with the ISO 11137 series of standards, and in conjunction with our industry-leading sterilization partners.

Single Use assemblies

What do we do?

Streamlining your work-flow

In the past, many of our clients undertook the laborious process of self-assembling, sourcing components from multiple suppliers, coordinating logistics, handling certificates, and performing assembly tasks themselves.


Elevate your efficiency

ESI deliver complete Single-Use Assemblies, double-bagged, certified and sterilised to your requirements. This means you can redirect your valuable expertise to where it matters most.

Wide European Coverage


We work with our sister companies across Europe, providing custom solutions to support the biopharma market.

Quality & Traceability


  • ISO 9001:2015 CertifiedQuality Control
  • Production Record
  • Training Record
  • Compliance Notification Process
  • Supplier Qualification
  • CoC Registration
  • Cleanroom Maintenance & Calibration
  • ISO 7 Class Cleanroom with cGMP-like processes

Manufacturing Capabilities


In our ISO 9001 Certified with ISO Class 7 Cleanrooms we customise solutions to best suit your process:

  • Tubing Assemblies: Molded & barbed (tubing, connectors, bags, filters, etc)
  • Bottle cap assemblies
  • Customised lengths of tubing
  • Bag and bottle manifolds
  • Perfusion, TFF and filtration assemblies

Custom Design & Capabilities

ESI Ultrapure delivers Custom Single Use Assemblies with swift turnaround times and unmatched versatility through our “Open Architecture” philosophy. Whether you are performing upstream operations, purifying monoclonal antibodies, developing a cell or gene therapy, or developing a PUPSIT strategy in your final fill and finish, our process experts can support your decision-making.

Single Use Assembly for Biopharma

Completely Brand Independent

  • Simple or complex Single-Use Assemblies
  • Our technical experts can offer design support for product efficiency
  • Single-Use Assemblies for every application
  • We can offer exact equivalence to existing assemblies, providing a competitive dual source option
  • Completely brand independent, we build what you specify
  • We have production capacity to allow for quick turnaround of your requirements

From Standard Components

  • Perfect for Transfer Tubing and System Integration
  • Build your own Tubing and Sampling Manifold
  • We have stock of the world-leading brands of Tubing, Fittings, Connectors, Bags & Bottles
  • Made in ISO Class 7 Cleanroom and sterilised to your requirements.

Customer feedback for ESI Ultrapure


Get in touch with our dedicated team. We are here to help!