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Rubber Technologist Wanted for Growing Team - April 2017

Due to growth, an exciting opportunity has arisen for a Rubber Technologist / Senior Technologist to...read more

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Rubber Compound for Domestic Water Treatment Association (DWTA) - May 2016

The longevity and efficiency of water heating primary circuits and boilers, including central heating systems, can be greatly improved by the use of chemical water treatment. The purpose of these treatment fluids in central heating systems is to:

  • inhibit corrosion of vital metallic parts such as pipes and radiators,
  • prevent scaling up of the system, and in particular the boiler.

In addition the fluid should not cause damage to plastic and rubber components of the system and should have a low environmental impact.

In 2004 the Domestic Water Treatment Association (DWTA) requested Clwyd to propose a series of 4 typical rubber compounds used for seals in radiators and alike that could be used as test standards for new additives to assess they didn’t destroy existing seals. The Specification was first published in February 2006 and is now being used as a benchmark for chemical inhibitor manufacturers to develop new chemical inhibitors and by BuildCert to offer third party Certification.

For a copy of the Specification Click Here.

The standard rubbers used are Clwyd preparation numbers that are also available to purchase to produce seals:

Material Type

Reference

EPDM 70, sulphur-cured

5073B032

EPDM 70, peroxide-cured

5073B003

EPDM 70, resin-cured

5373B001

NBR 70, peroxide-cured

4073B074

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