Transport And Storage; Delivery; Unpacking; Intermediate Storage - Grundfos DMH 251 Installation And Operating Instructions Manual

Maximum permissible viscosity at operating temperature*
Applies to:
• Newtonian liquids
• non-degassing media
• media without suspended matter
• media with a density similar to water.
Note that the viscosity increases with decreasing
Note
temperature!
Up to stroke
rate 63
Pump type
[n/min]
Maximum viscosity* [mPa s]
DMH 251 300
DMH 252 300
DMH 253 300
DMH 254 300
DMH 255 200
DMH 257 200
* The stated values are approximate values and apply to the
standard pumps.
Permissible media temperature
Min. media
Dosing head
temperature
material
[°C]
PVC 0
Stainless steel,
–10
DIN 1.4571*
Stainless steel,
–10
DIN 2.4610*
PP 0
PVDF** –10
* For SIP/CIP applications: A temperature of 145 °C at a
counter-pressure of max. 2 bar is permitted for a short period
(15 minutes).
** At 70 °C, the maximum counter-pressure is 9 bar.
Warning
Observe the chemical manufacturer's safety
instructions when handling chemicals!
The dosing medium must be in liquid form!
Observe the freezing and boiling points of the
dosing medium!
The resistance of the parts that come into contact
with the media depends on the media, media
Caution
temperature and operating pressure. Ensure that
parts in contact with the media are chemically
resistant to the dosing medium under operating
conditions!
Make sure that the pump is suitable for the actual
dosing medium!
12
Stroke rate From stroke
64-120 rate 121
[n/min] [n/min]
100 50
100 50
100 10
100 5
100 5
50 5
Max. media temperature
p < 10 bar p < 16 bar
[°C] [°C]
40 20
100 100
100 100
40 20
60 20

7. Transport and storage

Do not throw or drop the pump.
Caution
Do not use the protective packaging as transport
packaging.

7.1 Delivery

The DMH 25x dosing pumps are supplied in different packaging,
depending on pump type and the overall delivery. For transport
and intermediate storage, use the correct packaging to protect
the pump against damage.

7.2 Unpacking

Retain the packaging for future storage or return, or dispose of
the packaging in accordance with local regulations.

7.3 Intermediate storage

• Permissible storage temperature: –20 °C to +50 °C.
• Permissible air humidity: max. relative humidity:
70 % at +40 °C, 90 % at +35 °C.

7.4 Return

The pump must be thoroughly cleaned before it is returned or
stored. It is essential that there are no traces of toxic or
hazardous media remaining on the pump. Drain the oil from the
drive mechanism and package the pump correctly.
Grundfos Alldos accepts no liability for damage
caused by incorrect transportation, missing or
Caution
unsuitable packaging of the pump, residual
media or leaking oil!
Before returning the pump to Grundfos Alldos for service, the
safety declaration at the end of these instructions must be filled
in by authorised personnel and attached to the pump in a visible
position.
If a pump has been used for a medium which is
injurious to health or toxic, the pump will be
Caution
classified as contaminated.
If Grundfos Alldos is requested to service the pump, it must be
ensured that the pump is free from substances that can be
injurious to health or toxic. If the pump has been used for such
substances, the pump must be cleaned before it is returned.
If proper cleaning is not possible, all relevant information about
the chemical must be provided.
If the above is not fulfilled, Grundfos Alldos can refuse to accept
the pump for service. Possible costs of returning the pump are
paid by the customer.
The safety declaration can be found at the end of these
instructions.
The replacement of the power supply cable must
be carried out by an authorised Grundfos Alldos
Caution
service workshop.