H15 and H20 Technical Information

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Optimum Operating Conditions:

Temperture adjustment range
35-50°C
Temperature setting at factory
41°C
Hot supply temperature range
52-85°C
Minimum differential between hot and mixed water supply 5°C
Dynamic inlet pressure range* 0.2 - 5 bar Maximum static pressure 10 bar

NB: Hot & cold water supplies do not need to be equal. The lower of the two pressures, however, should not be less than 0.2 bar dynamic. Thus, mains cold water can be mixed with tank-fed hot water provided that the hot water pressure is not less than 0.2 bar dynamic (Dynamic = with the water running).

The minimum differential between the hot supply temperature and the mixed water temperature relates to the ability of the valve to shut off the hot water supply in the event of a cold water failure.

Although factory set at 41°C, the temperature should be checked during commissioning to ensure optimum performance under site conditions.

Materials of Construction
Body: DZR Brass (BS EN 12164 CW 602N)
Slide Valve: Engineering Acetal
Springs: Stainless steel
Seal Components: Nitrile, EPDM

All materials are WRAS approved.


Horne Engineering Ltd, PO Box 7, Rankine Street, Johnstone, SCOTLAND, PA5 8BD
Tel: +44 (0) 1505 321455 Fax: +44 (0)1505 336287 Email: sales@horne.co.uk