PRODUCT DESCRIPTION
If, for example the inlet hot pressure dropped, the ow of
hot water into the valve would be reduced and the valve
would react as per the following sequence of events:
• Element is exposed to mixed water at a reduced
temperature
• Thermostatic Element contracting
• Piston is pushed upwards by the return spring restricting
cold ow, consequently opening more of hot port.
• Valve attempts to restore itself to original temperature
setting.
Similarly if the hot inlet temperature dropped, the element
would again see blended water at a lower temperature and
therefore the Element would again contract reducing the
cold port piston gap and hence supply more hot water and
less cold. Once again the valve attempts to restore itself to
its original setting. This will occur for all changing conditions
including changes to ow rate, inlet temperatures and inlet
pressures.
In the event of a sudden loss of the cold water supply the
Piston will shut off the hot port thus stopping any ow through
the valve. The valve will also shut down the cold supply if there
is a hot water failure.
