Neptune HP PROTECTUS III, Installation And Maintenance Manual

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Recommended Installation
You can lower the HP PROTECTUS III meter assembly into the meter vault and put it in place
using chains or straps. Attach the chains or straps to the lifting hooks on the top of both the
strainer and knuckle valve.
Do not lift the assembly by a single center strap around the meter body or by either end
alone.
The recommended installation of the HP PROTECTUS III is in a horizontal position with its
arrow pointing in the direction of the water flow. You can install the HP PROTECTUS III bypass
meter on either side of the mainline meter. Before installing, inspect the knuckle valve to
make sure the valve is fully seated and the face is undamaged.
A full-size bypass around the assembly is recommended, because it provides uninterrupted
service capability during meter servicing periods. As indicated previously, the required UL-
listed and FM-approved strainer provides protection against meter damage from rocks and
debris in the lines and virtually eliminates the effects of variation in upstream piping.
A test port on the top of the knuckle valve section enables field testing the meter without
removing it from the line.
When installing an HP PROTECTUS III meter assembly, follow normal good piping practices.
In particular, centrally locate all gaskets on their flanges with no overlap or interference with
the pipe diameter.
The HP PROTECTUS III meter assembly must operate in a completely-filled line at all times.
The downstream piping must always provide sufficient back pressure to maintain a full line at
the meter.
You can separate the strainer basket from the T-10 and HP Turbine for easier installation in
a pit or basement. See Appendix A on page 33.
HP PROTECTUS ® III Installation and Maintenance Guide 11
Chapter 3: Installing the HP PROTECTUS
®
III