ALBIN PUMP ALHP Series, Руководство по обслуживанию

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4.2
Operation of the pulsation dampener
The Albin pulsation dampener reduces the pulses created in the discharge line by the hose
pump. This is achieved by means of a thick-walled, reinforced rubber hose which is mounted
in a carbon steel, cylindrical pressure vessel. The hose is surrounded by compressed gas (air or
nitrogen).
Pulses are created when a pressing shoe leaves the pump hose, while rotating. Instantly the
volume in the discharge line will increase with the volume of the pressing shoe. This will result
in a pressure drop in the discharge line.
When the discharge pressure drops, the pulsation dampener hose collapses and compensates
for the released volume of the pressing shoe in the discharge line. Hereby the pulse will be
reduced.
Dependant on the application the dampener can reduce the pulse down to 10%. The damp-
ener is most effective above 3 bar discharge pressure. The pulsation dampeners can be applied
up to a operating pressure of 15 bars. The pulsation dampeners are safeguarded for over-pres-
sure by a pressure-relief valve.
4.3
Pulsation dampener hose
The pulsation dampener hose liner material should be chemically resistant to the product to be
pumped. Dependent on the specific requirements of your application, a matching hose should
be selected.
For each pulsation dampener, various hose types are available. The material of the inner liner
of the hose determines the hose type. Each hose type is marked by a unique colour code.
Hose type Material Colour line
NR Natural rubber white
NBR Buna rubber Yellow
EPDM EPDM Red
Consult your Albin representative for hose pumps for more detailed information about the
chemical and temperature resistance of pulsation dampener hoses.
Store the pulsation dampener hose in a cool, dry place and do not subject it to sunlight.
4.4
Pulsation dampener selection
The pulsation dampener types mentioned on the front cover are functional with more than one
type of Albin Pump hose pump type. In the following table the right pulsation dampener can
be selected to match your hose pump: Selection table pump and pulsation dampener
Pulsation dampener type Hose Pump type:
ALHP20 ALHO5, ALH10, ALH15, ALH20
ALHP40 ALH25, ALH32, ALH40, ALHX40
ALHP50 ALH 50, ALH65
ALHP100 ALH100, ALHX80, ALH80
ALHP125 ALH125