12
Chapter 3. MOUNTING AND WIRING
*6: The figures below show examples of connection with a single elbow and double elbow.
*7: This valve does not have an internal throttle. If possible, install a flow regulating valve downstream from
the MCF.
*8: A regulator should be 200D away from this device. The pipe from the regulator to this device may be
consist of an air tube and elbow. However, if the elbow is connected to this device, use the necessary
straight pipe section for the elbow.
• Connection with a tube fitting for air supply piping
If connecting a tube fitting for air supply piping to the
MCF
, install a straight pipe
section between them as shown below.
Connecting a smaller size pipe to the
MCF
without a straight pipe section might
cause a reverse flow in the measurement module, even though there is a regular for-
ward flow in the main flow path. Therefore the instantaneous flow rate display
might indicate -0 (negative flow rate) or an extremely low flow rate compared with
the actual rate.
The straight pipe lengths listed below apply only when there is a straight pipe fit-
ting. If the pipe fitting has an elbow, add 5D to the straight pipe length. The charac-
teristics are the same as those of about a 300 mm straight pipe section from the fit-
ting.
Tube fitting
for air supply piping
Tube
Straight pipe
