REMKO DN 25 - Manual (Page 4)

4
REMKO
THREE-WAY SWITCHING VALVE
Mode of operation
All the moving parts and all valve gaskets
are incorporated into a cartridge.
The outer surface of the piston has O-
rings which guarantee that the paths are
hermetically sealed.
If the valve rod is down, flow path B is
blocked, and the flow passes through the
openings of the cylindrical gate valve,
taking the route "A" and "AB".
If, on the other hand, the valve rod is up
(outlet position), then flow path "A" is
blocked and the flow takes the route "B"
and "AB".
Switching between the two flow
directions takes approx. 6 seconds.
Operation
Manual adjustment of the lever (attached
to the side of the actuator) is only pos-
sible if it is pointing up.
If this is the case, push it firmly down and
inwards until it engages in the central
position. In this position, the three-way
switching valve is opened in flow direc-
tion "A" to "B" (and vice-versa). Manual
actuation of the valve is useful when
the line system is being refilled, drained
or bled, but also if the electric motor is
no longer functional (e.g. due to power
failure).
By gently pushing and pulling the lever, it
is possible to move the valve back into its
original "locked position".
When the three-way switching valve is
reconnected to the power supply after
a power cut, the actuator and the valve
return to the automatic position.
Control of the flow direction
Valve pin up (outlet position)
Flow direction: B<->AB
A
B
AB
A
B
AB
Valve pin down
Flow direction: A<->AB