• Attach the PFA ring and circlip to the underside of the meter flange before installing
the meter in your application (see Attach the PFA ring and circlip).
Note
If you are using a Zirconium meter, this meter uses a self-locking PFA ring and does not
require a circlip.
Procedure
1. See Figure 3-6 for information on installing the meter with a flanged fitting in a 2 in
(51 mm) T-piece.
Figure 3-6: T-piece (flanged fitting) meter installation
A. 2 in (51 mm) pipe or larger for horizontal or vertical installations
B. Distance of meter tines from main pipe wall is determined by the maximum flow
rate of the process.
C. PFA ring and circlip (not required for a self-locking PFA ring)
Tip
For hygienic applications, a normal 2 in (51 mm) hygienic tube is too thin for this
application; (it can vibrate in sympathy with the fork, causing measurement errors).
Use a 3 in (76 mm) hygienic tube and fittings instead, or fabricate hygienic fittings
with the same wall thickness and internal diameter as those shown in the diagram
above.
• Insert meter tines directly into the fluid flow.
• For both vertical and horizontal pipes, always install the meter on the side of the
pipe. For a horizontal pipe, never mount the meter on the top of the pipe.
Important
During installation, always position the meter so that the gap between the tines is
vertical. This position helps prevent the trapping of bubbles or solids on the meter –
allowing the solids to sink and the bubbles to rise. You can use the scribe mark on
the spigot (located between the flange and transmitter) as a reference for the tine
orientation. Always orient the meter so the scribe mark is at either the 12 o’clock or
6 o’clock position.
The gap between the fork tines must always be vertical so that:
• Solids drop down
Mounting
Installation Manual
May 2019 MMI-20020989
22 Micro Motion Fork Density Meter
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