9
When the discharge pressure drops, the pulsation damper hose contracts and compensates for the
released volume of the pressing shoe in the discharge line. The fluid deceleration is minimised and
the pulse will be reduced.
Depending on the application and size the damper can reduce the pulse by 50-90%. The damper is
most effective at a discharge pressure of 500 kPa or above. The pulsation dampers can be
pressurized up to 1600 kPa. The pulsation dampers are safeguarded for over-pressure by a
pressure-relief valve.
4.3
Pulsation damper hose
The pulsation damper 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.
A. Outer extruded layer made of natural rubber
B. Four nylon reinforcement layers
C. Inner extruded liner
For each pulsation damper, 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
M aterial
Colour
code
Article number:
PD/40
PD/65
PD/100
NR
Natural rubber Purple
P040020
P065020
P100020
NBR
Nitrile rubber
Yellow
P040040
P065040
P100040
EPDM
EPDM
Red
P040075
P065075
P100075
Consult your Bredel representative for Hose Pumps for more
detailed information about the chemical and temperature resistance
of pulsation damper hoses.
Store the pulsation damper hose in a cool, dry place and do not
subject it to sunlight.
