Valid from: 15.02.2021 / Source: VAM-UM-00551-EN-04
Despite careful checking, we cannot exclude the possibility of errors in this document and we accept no liability for the information it
contains.
Page 6
The volume flow meter is a device that is easy to install. However, the following
measures are recommended to ensure it can be operated safely and without any faults:
Align the pipeline precisely. The piping should be aligned precisely and be of the
correct length. The high-pressure casing of the volume flow meter is able to
withstand impacts and flow/pressure pulsations. However, the pipeline should be
securely supported by external mounting brackets both before and after the
measuring device in order to prevent the pipeline from any sagging that might
shorten the useful life of the measuring device.
Use a rigid form of mounting. If the inlet or outlet of the volume flow meter is to
have a rigid mounting and the opposite connector is to be connected with a flexible
hose, the opposite end of the flexible hose must be mounted with a rigid fixing.
Use Teflon® tape to seal up the NPT threaded fitting.
Fit screw connections. Fit a screw connection close to the inlet or outlet of the
volume flow meter. This will make it quick and easy to remove or carry out an
inspection during the regular maintenance work.
Mount the volume flow meter either horizontally or vertically (flow arrow pointing
upwards or to the side). If the volume flow meter needs to be mounted inverted,
special inverted scales are available from the manufacturer.
Make sure that the fluid flows in the direction of the flow arrow (Figure 1 / p. 7).
Use at least one 74 µm filter. The measuring device will let through particles that
would block most valves and flow meters. Systems that do not have any filtering
should be equipped at least with a 74 µm filter.
Most hydraulic systems already have much finer filtering.
Dirt, iron filings or sealants, such as Teflon tape, may clog up the system and cause
malfunctions. If the measuring device has jammed in one position, follow the
cleaning and maintenance instructions.
Do not use any thread lock agent as a thread seal!
Do not install the volume flow meter near to any fittings that create turbulence, for
example elbows, reducer parts, short-cut valves, etc. The volume flow meter does not
require any flow straighteners or special lengths of straight inlet/outlet pipes to
stabilise turbulent flow patterns. However, in order to guarantee maximum
operational reliability, avoid fitting any elbows, valves and/or reducer parts in the
immediate vicinity of the device.
Do not install the volume flow meter in the vicinity of quick-acting valves. Quick-
acting valves may generate high hydraulic pressure peaks. These pressure peaks may
damage the internal components, which can cause inaccuracies or malfunctions.
