PROFACTOR PF RVM 389.32 Технический паспорт онлайн [13/29] 851374

Profactor Armaturen GmbH

Adolf-Kolping-Str. 16, 80336 München, Germany, Telefon: +49 89 21546092

E-mail: info@pf-armaturen.de, Internet: www.profactor.de

6. PRINCIPLE OF OPERATION

The three-way valve may act as ﬂow mixing or ﬂow separation. By turning the shutter in one

direction the passage of hot liquid will gradually open and equally close for the cold liquid

(return ﬂow from the heater).

This increases the temperature of mixable working ﬂuid (ﬂow for heater) at an almost constant

ﬂow rate. The required temperature in the system is achieved by adding the necessary

amount of liquid ﬂowing from the return pipe to the boiler feed.

Mixing the flow

Separating the flow

Principle of operation Three-way valve:

Four-way valve works on the principle of double-pass, i.e. the water from the boiler is mixed

with a certain portion of the water from the return. When the passage of the hot water is

closed, the bypass return path to the heater opens to achieve the desired water temperature

in the circulating flow.

In this case water returning to the boiler reaches a higher temperature than with the three-way

valve use. This reduces the risk of low-temperature corrosion in liquid and solid fuel fired

boilers, and thus extends the operation of the boiler.