18
15.720017-V6.0
DMX model 226 en
14
p
1
p
2
p
2
- p
1
1 bar
>
_
● Note for pressure side installation:
to protect the piping use pulsations damper (8) for rigid piping longer than
3m and tubing longer than 5m.
8
6
10
p
4
● In dosing systems that require a long suction line:
Provide a properly dimensioned pulsation damper (4) directly in front of the
suction valve of the dosing pump.
● For outgassing and viscous media: flooded suction
● To protect the dosing pump and the pressure line agains: excessive
development of pressure: Install an overflow valve (6) in the pressure line.
10 Injection unit
● With open outflow of the dosing medium or a counterpressure below 1 bar:
Install a pressure retention valve (7) directly in front of the outlet or the
injection unit.
A positive pressure difference of at least 1 bar has to exist between the
counterpressure at the injection point and the pressure of the dosing medium
at the suction valve of the dosing pump. If this cannot be guaranteed:
• Install a pressure retention valve (7) in the pressure line
To avoid the siphon effect:
● Install a pressure retention valve in the dosing line and, if
necessary, a solenoid valve (14) in the suction line.
7
p
≥
2 bar
!
WARNING Risk of hot surfaces! Pumps with A.C. motors can
become hot. Allow a minimum spacing of 100 mm to
the ventilator cowl!
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