Figure 4: Using the flow paddle screw to install paddles
Accessories
Table 2: Replacement paddle parts
Product code
Description
PLT69-11R
Stainless steel 6 in. paddle
KIT21A-602
Stainless steel 6 in., 3 in., 2 in., and 1 in.
paddles
Mounting
Figure 5: Wrench usage
Important:
• Use only the wrench flats provided.
• To avoid damaging the switch, do not tighten
the switch to the tee by grasping the switch
enclosure.
To mount the F261 Series Flow Switches, observe the
following guidelines:
• Install the switch so that the enclosure and interior are
accessible.
• Mount the switch so that the flow of the fluid is in the
direction of the arrow on the enclosure.
• Use a pipe union on each side of the flow switch to
allow for easy removal or replacement.
• Do not allow the pipe to extend too far into the flow
switch casing.
• Use pipe thread sealer or Teflon
®
tape on the male
threads only.
• Do not remove the case-to-cover O-ring on Type 4/IP67
enclosures.
Figure 6: Trimming diagram for the large flow paddle
For standard 1 in. x 1 in. pipe installation, mount the F261
flow switch in a standard 1 in. x 1 in. x 1 in. tee. For larger
sizes of pipe, use a reducing tee to keep the flow switch
close to the pipe and provide adequate paddle length in
the flow stream.
Example: Use a 2 in. x 2 in. x 1 in. tee for a 2 in. pipe. If you
use a standard 2 in. x 2 in. x 2 in. tee, install a face or hex
bushing in the top opening to reduce the top opening to 1
in.
F261 Series Flow Switches Installation Guide
4
