The Blank End Plug (BEP) is installed within the permeate tube of the first membrane within the housing. Its primary function is to seal the permeate tube from incoming feed material, ensuring correct flow paths and maintaining system performance. 

Unlike an ATD, the BEP does not need to account for telescoping forces at the feed end. Its simplified design allows for maximum flow to into the element feed channels and onto the membrane surface, supporting efficient production and effective cleaning (CIP). 

Why it matters

  • Ensures correct feed flow paths. 
  • Prevents internal bypass and hydraulic inefficiencies. Supports system flexibility and future expansion  

 

Ideal for:

  • All spiral wound membrane systems   
  • Plants modifying or expanding membrane area   
  • Maintenance and system optimisation during membrane replacement periods. 

 

View or download our latest product brochure and parts list, or reach out to the SMS team for advice.

Frequently Asked Questions

Yes, a BEP is all that is required for most horizontal membrane vessel configurations. The purpose of the Blank End Plug is to simply seal the permeate tube from the feed material. The Blank End Plug is not shaped like an ATD as there are no telescoping forces on the feed end of the membrane.

SMS EPDM and VITON lip seals are designed to fit global membrane permeate tube internal diameter dimensions standards. SMS have designed its own combination of ATD and Lip seal to meet these global standards. Depending on what OEM membrane component end users have in their plants there may be some subtle differences when SMS lip seals are applied to non SMS components. Providing shipping is covered, SMS can send samples to you to ensure seal fit meets your needs.

Take a look at the videos below to learn more.

Blank End Plug Design and Common Issues
Membrane Components Summary: ATDs and BEPs