D-1401 & D-1402 Portable Metering System Installation and Operation Guide • 03-17
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Typical ONICON Installation Hardware Kits:
ONICON’ s INSTL1
Standard
Installation Hardware
kit for black iron
pipe is for use in a drained, non-
pressurized system. The access hole is
drilled (1” minimum) prior to installation
of the 1” NPT branch outlet, close nipple
and full port ball valve. Once the
isolation valve is installed, the piping
system can be flushed and pressurized.
The flow meter may now be inserted or
removed by hand without having to drain
the system. Please read all instructions
before proceeding with meter insertion.
ONICON’ s INSTL2
Hot Tap Installation
Hardware
kit for black iron pipe offers
an alternative installation when it is not
practical to drain or relieve the pressure
in the system. In this case, a 1¼” branch outlet, close nipple and 1¼” full port ball valve are
installed first. Then, a hot tap drilling apparatus can be used to drill a 1” diameter hole through
the valve, without shutting down or draining the pipe.
(See Appendix A for List of Available Onicon Installation Hardware Kits for other types of pipe
materials and applications.)
After fitting the necessary plumbing hardware, flush the entire system so that it is free of flux,
solder and slag. Prepare to install the flow meter by loosening the clamping nut and withdrawing
the turbine assembly fully into the hot tap adapter. Next, thread the adapter on to the ball valve
using a paste type thread sealant. Do not use Teflon tape because torn strands of the tape may
wind around the turbine, slowing down or even stopping the turbine.
Check the installation for leaks by slightly opening the ball valve. An ‘ O’ ring in the hot tap
adapter seals the meter stem against leakage. If there are any leaks around the clamping nut or
stem,
DO NOT ATTEM PT TO STOP THE LEAKAGE BY OVERTI GHTENI NG THE
CLAM PI NG NUT. Damage to this nut or the clamping ring under the nut may prevent
the assembly from properly holding the meter in the pipe.
The clamping nut is not part of the
sealing mechanism. Any leaks in this area indicate that the ‘ O’ ring is not sealing properly and
you must contact the factory for assistance.