Upstream and Downstream Requirements
Neptune is in the process of characterizing the performance of the MACH 10 meter under
various upstream and downstream installation configurations, such as with the use of
strainers, elbows, gate valves, and test tees for the purpose of providing installation
guidelines. Until these characterizations are completed, Neptune recommends that you use
industry-accepted mechanical meter practices for similar type installations.
Installation – Commercial and Industrial
Following are the steps to install the C&I MACH 10 meter.
Although lighter than traditional mechanical meters, take care when moving and lifting the
Commercial and Industrial MACH 10 meters. Lift brackets are provided on meters greater
than 3” to aid in lifting the meter. Use proper company and government safety guidelines
when lifting.
1. Flush the service line prior to meter installation in order to remove debris and air in the
line.
2. If required by company practices, place an electrical grounding strap on the service line,
connecting the inlet and outlet service lines on either side of the meter setting.
3. If you are installing the meter in a vault or enclosed area, be sure to follow all utility and
industry confined-spaces safety guidelines.
4. Be sure that no debris enters the meter during installation.
5. Place the coupling gaskets, and set the meter in the line.
6. Install the mounting bolts and turn the coupling or flange nuts by hand, then use a
wrench to tighten sufficiently to prevent leakage.
7. Slowly open the inlet-side valve to pressurize the meter while the outlet-side gate valve is
closed.
8. Slowly open the outlet-side gate valve until the downstream line is pressurized.
9. Rotate the meter’s bleed screw one to two turns to dissipate any entrained air, until water
begins to flow from the screw location. For bleed screw location and instructions, see
Figure 5 in chapter 3.
10. Allow water to flow from the screw location for a short period, then fully re-tighten the
meter bleed screw. (In practice, some air may still be escaping when you see water.
Allowing it to flow for a little while helps guarantee a good purge.)
11. Check to see if the meter is operating correctly while the valve is open.
12. Turn OFF the downstream valve and check the meter installation for leaks.
The C&I MACH 10 may take longer to completely remove air from the meter, particularly
when flow rates are less than 25% of the maximum flow rate of the meter.
14 Commercial and Industrial MACH 10
®
Ultrasonic Meter Installation and Maintenance Guide
Chapter 4: Installing MACH 10
®
Ultrasonic Meters
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