Mount the F261 flow switch in a horizontal pipeline or a vertical pipeline with upward fluid flow. When you mount the switch in a vertical pipe with an upward flow, it trips at a slightly higher flow than in Table 2 and Table 3, due to the effect of gravity on the switch mechanism.
Mount the F261 flow switch in a section of pipe where there is a straight run of at least five pipe diameters from the nearest elbow, valve, or other pipe restriction. See Figure 2.
|Distance of at least five pipe diameters from the nearest elbow, valve, or other pipe restriction
|Tee or welded half-coupling
When you mount the flow switch on a horizontal pipe, mount the flow switch within 60 degrees of vertical. See Figure 3.
|Water hammer arrester