Grundfos DMB 1.0-10, Руководство пользователя

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7
– Install a filter (15i) in the suction line to prevent the valves being contaminated.
When installing the suction line, observe the following:
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Keep the suction line as short as possible. Prevent it from becoming tangled.
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If necessary, use swept bends instead of elbows.
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Always route the suction line up towards the suction valve.
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Avoid loops as they may cause air bubbles.
In the case of long discharge lines, install a non-return valve (12i) in the discharge line.
5.4 Tube / pipe lines
5.4.1 General
WarningTo protect the dosing pump against excessive pressure build-up, installa relief valve in the discharge
line.All lines must be free from strain!
Avoid loops and buckles in the tubes! Keep the suction line as short as possible!
The flow must run in the opposite direction to gravity!Observe the manufacturer's safety instructions when
handling chemicals!
The resistance of the parts that come into contact with the media depends onthe media, media temperature and
operating pressure. Ensure that parts in contact with the media are chemically resistant to the dosing medium
under operating conditions!
Only use the specified line types!
5.4.2 Sizing of tube / pipe lines
Warning PVC tube DN 4 is not suitable for use as a discharge line! Connect PE tube DN 4 on the discharge side!
Warning Observe the pressure stage of the used lines. The maximum permissible inlet pressure must not be
exceeded!
Minimum internal diameter
Pump version
Pump type Standard[mm]
DMB 1.0-10 -
DMB 5.0-6
4
DMB 9.0-6
DMB 18-3.5
6
5.4.3 Connecting the suction and discharge lines
Warning All lines must be free from strain!Only use the prescribed line types!
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Connect the suction line to the suction valve (3a).
– Install the suction line in the tank so that the foot valve remains a few millimetres above the possible level of sedimentation.
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Connect the discharge line to the discharge valve (3b).
5.4.4 Connecting the overflow and deaeration lines
Warning Observe chemical resistance!
For all DMB pumps
See fig. 7 on page 16
The pump has a deaeration line (PVC 4/6).
• Connect the deaeration line (J) to the connection for the deaeration line (I).
5.4.5 Installing the overflow and deaeration lines
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Shorten the overflow line and deaeration line to at least 10 mm above the maximum tank level.
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Insert the overflow line and deaeration line downwards into the dosing tank or collection container. Avoid loops.
Dosing medium can leak from the overflow and deaeration lines. Route both lines into a collection container
or the tank!Do not immerse the overflow line and deaeration line in the dosing medium!
Observe the pressure limits specified in section 1. General information!
6. Electrical connections
Make sure that the pump is suitable for the electricity supply on which it will be used.