Anti Telescopic Devices (ATDs) for Membrane Systems

Anti Telescopic Devices (ATDs) play a critical role in protecting membrane elements from axial movement under pressure. Without the correct ATD configuration, membranes can shift within the housings, leading to permanent damage, reduced performance, and costly downtime.

SMS supplies a range of ATDs to suit different membrane dimensions, types, materials, and operating conditions.

How it works

ATDs are installed between spiral membranes at the end of the last membrane within the housing. They mechanically restrain the element, preventing axial movement caused by differential pressure during operation and CIP.

Why ATD’s matters

Prevents membrane telescoping under pressure

Protects against mechanical damage

Maintains consistent system performance

Extends membrane service life

Features and Benefits

Engineered to prevent membrane telescoping under high-pressure conditions, reducing the risk of mechanical damage and premature failure.
Optimised for cleaning (CIP) - designed with maximum flow-through space and around the lip seal centre core to support effective cleaning and minimise fouling build-up over time.
Improved permeate access - a deep ‘V’ profile allows better access to the permeate tube, improving cleaning effectiveness of both the ATD and lip seal.
Maximised membrane utilisation - increased flow area ensures more of the membrane surface is actively used during production.
Designed to connect with lip seals, ensuring efficient transport of permeate components.
A stainless steel ATD is recommended on the permeate outlet end of the membrane housing. This provides added strength and durability to withstand the much higher longitudinal forces experienced at the end of the membrane train.

Other functions in mid membrane housing ATDs, also called interconnectors:

Connect membrane elements in series
Provide a mechanical and hydraulic connection between spiral-wound membrane elements, enabling the feed stream to pass sequentially through each element within the membrane housing.
Maintain separation of process streams
Ensure that the permeate stream remains isolated from the feed/retentate stream, preventing cross-contamination and preserving system performance.

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

Applications:

Lower pressure membrane systems (UF/MF)

High-pressure membrane systems (RO/NF)

Systems experiencing membrane movement or damage

Plants wanting to reduce premature membrane failure

Typical Industies:

Dairy membrane systems

Industrial filtration systems

Retrofit upgrades to improve reliability

Frequently Asked Questions

Will SMS lip seals fit into our ATD or Blank End Plug?

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.

Where are SMS seals made?

SMS manufacture all its own products locally in New Zealand and have done for 20 years. We supply products across the globe.