Sierra RedyCompact Meter, Инструкция по эксплуатации, Страница: 23 / 73

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•
The size of the pipe must be matched to the measuring/control device. A diameter that
is too small results in an increased pressure drop.
•
Check for any leaks before commissioning the devices.
•
For maintenance work, we recommend that a bypass system is used. This is
particularly important where the gas supply must not be interrupted.
3.12.
Fittings and Filters
You can order a wide range of process fittings and adapters for
the RedyCompact. Some compression fittings are available with
an internal
50μ filter. Please refer to our website contact you
local distributor for more details. Please also consider that fittings
and filters can create additional pressure drops over the flow meter.
.
3.12.1 Installation
The fittings are supplied in pairs. They preferably should be installed with filter at the inlet and
without filter at the outlet. The fitting with a filter must be installed at the inlet (as determined by the
flow direction). The sealing rings (O-rings) must not be damaged during assembly.
For more information, see the
data sheet for the fittings .
3.13.
Filters / Gas Cleanliness
We always recommend that a filter, or at least a fine-mesh sieve (50 microns), is installed before
the measuring devices. It often happens that solid matter such as welding residues, metal or
plastic chips, rust, sealing tape, etc. affect the function.
Warning
Please note that the length of the tread on you fitting that is screwed inside
the body is for the
G¼˝ no longer than 10mm (⅜”) and for the G½˝ no longer
than 13mm (
½˝) to
avoid internal damage.
Warning
The design of the devices enables sealing at the ends with O-rings or flat
seals. It is
essential that you avoid:

the use of sealing tape to seal threads. Small pieces can cause
incorrect measurements and control-valve malfunctions. As well as
that, if the device has to be checked or recalibrated, there will be an
extra charge for the additional cleaning work.

sealing with liquid sealants will incur a higher cleaning charge for
cleaning the device in an ultrasonic tank.
Figure 5: 316SS Compression fittings