Mounting - PENN Controls - F261KEH - F261KFH - F261MEH - F261MFH - Flow, Liquid Level, and Air‐Volume Control - F261 Fluid Flow Switch

F261 Series Flow Switches Installation Guide

PENN Controls
Product name
F261 Fluid Flow Switch
Document type
Installation Guide
Part number
Document revision
Revision date
Figure 1. Wrench usage

  • 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 2. 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.