Valve technology for healthy living

Valve materials are crucial in drinking water installations. The advanced copper-zinc alloy CUPHIN® used in Bruse valves and fittings not only meet highest technical and mechanical demands but also comply with present and future requirements in regard to hygiene.

Clear regulations

Valve materials and the products manufactured form them are tested in regard to the migration of chemical substances and the growth or microorganisms.
Beginning on 01/12/2013 the threshold for lead in the scope of the drinking water directive Chemical requirements (§6 Chemische Anforderungen) will be established at 10 µg/l to reduce health risks.

With our high-quality valves from CUPHIN® we offer safety and hygiene in drinking water installations already today.


CUPHIN® - Chemical composition

Cu 76 %
Si 3 %
P 0,05 %
Zn Remainder
(Nominal, mass percentage)  



CUPHIN® - Physical properties
Density 8,3 g/cm3
Electrical conductivity 4,5 MS/m
Thermal conductivity ca. 35 W/mK
E-Module 100 GPa
(reference values)  



Extraordinary mechanical properties

The material CUPHIN® which we use for our valves is distinguished by good mechanical properties. This is otherwise known only from a few steel grades.


Rm tensile strength 700 MPa
Rp 0,2 %-proof stress 480 MPa
A5 breaking elongation 20 %
HB hardness 180 Brinell
(reference values apply to semi-finished material of approx. 20 mm diameter)


More information at



Corrosion resistance

Stress corrosion cracking resistant (SCCR) and dezincing resistant (DZR) at the same time: Hardly any other material in drinking water installations has such combined properties as CUPHIN®.

The requirements of DIN 50930-6 in regard to the alloy composition will be met without problems even beyond 2013.

Conclusion: Bruse has developed procedures and methods to offer you contemporary valves made from CUPHIN®.