Hydraulic installation
Hydraulic accessories
26
© Lutz-Jesco GmbH 2014
BA-10103-02-V01
Stepper Motor-driven Diaphragm Dosing Pump
MEMDOS SMART LK
Operating instructions
No.
Description
햷
Pressure line
햸
Dosing pump MEMDOS SMART LK
햹
Wall bracket
햺
Shut-off valve
햻
Suction line
Tab. 14: Designation of components
8.7.5 Pulsation dampener
Pulsation dampeners have the following functions:
Damping pulsating delivery fl ows for processes that require
low-pulsation dosing,
Reducing the throughfl ow resistance with long pipelines.
When installed on the suction side:
Damping of acceleration mass forces and with this reduction of wear
on the dosing pump.
Preventing cavitation (pull-off of the liquid column) due to too high
acceleration.
However, pulsation dampeners also have important safety functions,
since they prevent pressure peaks from arising that lead to piping
vibrating and cause them to snap.
This problem can occur:
with the high amplitudes of the vibrations,
when using long pipes (the severity of the pulsation increases with the
length of the pipe),
when using rigid piping instead of elastic hoses.
Notes on assembly:
You should carry out assembly in the direct vicinity of the location
where you want to damp the pressure peaks (directly in front of the
suction valve or directly behind the discharge valve).
Pulsation dampeners should be installed with throttle valves or
back-pressure valves installed directly behind them. By setting the
valves appropriately, you can further-optimise damping of the
pulsations.
To prevent unnecessary pipe friction losses, you should lay the
connecting line straight and in accordance with the rated width of the
pulsation dampener.
You must separately fasten relatively large pulsation dampeners and
ones with hose connections.
Pipelines must not transfer any mechanical tensions onto the
pulsation dampener.
햲
햳
햴
햷
햹
햺
햻
햵
햶
햸
Fig. 23: Installation with a pulsation dampener
No.
Description
햲
Main line
햳
Injection nozzle with shut-off valve
햴
Pulsation dampener
햵
Dosing tank
햶
Pressure line
햷
Dosing pump MEMDOS SMART LK
햸
Wall bracket
햹
Suction pulsation dampener
햺
Suction line
햻
Shut-off valve
Tab. 15: Designation of components
