18 15.720023-V3.0
DMX model 227
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 medi-
um 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
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