Maintenance and Cleaning
Gearwheel flow meters are generally maintenance-free. However, if fluids that can leave
deposits flow through the device, cleaning may be necessary. Otherwise, the device can
be cleaned with the rest of the system during the standard cleaning procedure. Indications
of wear may be evident by a change in measuring accuracy. It is recommended the device
be inspected regularly.
Caution:
If fluids harden in the gearwheel flow meter, it must be cleaned as quickly as possible with
suitable cleaning agents.
The mounting screws must be regularly checked for tightness. If necessary, retighten
them (in such case, observe the tightening torque specified in the section ”Installation”).
Caution:
Be sure to relieve the pressure in the piping before performing any work on the
gearwheel flow meter or removing it. The gaskets in the joints between the gearwheel
meter and the piping system must be checked regularly for leakage.
Removal:
1. Depressurise and de-energize the system.
2. Close existing shut-off elements upstream and downstream of the device.
3. Open existing drain elements and loosen connection lines. Collect and dispose of
discharging medium so that no hazard arises for persons or environment.
4. Dismantle the device.
Pull the plug off the housing.
Plate connection:
Release the unit from the connection plate.
Pipe connection:
Loosen the pipe connections from the unit and, if applicable,
take the unit off the holding fixture.
5. Clean the device
6. Close the device connections and lines to prevent dirt penetration.
Cleaning:
Devices in series 1, 2, 6, and 8:
These devices must never be opened by the customer. They must only be opened by
trained service personnel because only such specialists can reassemble them properly so
that they will function correctly.
Devices in series 4 and 5:
If due care is used, these devices may be opened and cleaned by the customer.
DV04 Instruction manual 02/2021
page 9