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photo 1 |
A reader queried the apparent lack of DZR in the photographs. PA contacted Kwikot immediately and Hendrik Malan was prompt to reply to our query.
It was established that DZR is only required in the area where the potable water touches metal (DZR). This is what the photographs sent to Plumbing Africa did not show (Photo 2).
According to Hendrik Malan, Business Development Manager of Kwikot, "You cannot test DZR on a component that is not made of a metal. The brass socket does comply with DZR." To this end Mr. Malan provided cut outs of the safety valve as shown in the photo 1.
Malan, further informed Plumbing Africa that the new Safety Valve which is in contact with the potable water is made of a material called Grivory HTV 4X1.
What is Grivory HTV 4X1?
Grivory is an injection molding grade with 40wgt% glass-fibre reinforced based on copolyamide (poloypthalamide) PA 6T/6I.
Not only is heat stabilised for direct contact with foodstuff, but Grivory is stiff and strong at high application temperatures and is good resistance to chemicals.
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photo 2 |
Firm dimensionally, accurate technical parts in mechanical engineering, automotive and electro application, Grivory is a functional element in domestic appliances in direct contact with drinking water at high application temperatures.
Did it receive approval?
Approved for direct contact with hot drinking water as per KTW, WRAS NSF regulations, Grivory, conforms to EU regulations for direct contact with foodstuffs.
According to Malan, highly respected test houses such as KTW (Germany), WRAS (UK) and (France) have approved the use of Grivory for the application.
In South Africa, Grivory received an SABS mark under the SANS 198:2001. "A full specification test was performed on the 600kPA and 600kPA T&P safety valve submitted," said Malan.
Once again Plumbing Africa has managed to provide its readers with accurate information in the interest of safety and health. ◊
