Neptune HP PROTECTUS III, Руководство по установке и обслуживанию

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Before Operation
Before putting the HP PROTECTUS III meter assembly into service, complete the following
steps.
1. Close all valves.
2. Turn the air bleed screw on the knuckle valve and strainer cover counter-clockwise one to
two turns.
3. Slowly open the mainline inlet side gate valve to pressurize the meter.
With the bleed screw open, you hear air vent from the open bleed screw.
Figure 6 – Bleed Screws
4. Wait until the water begins to run from the bleed screw and does not sputter out.
This helps to vent some of the air before opening the downstream valve.
There is still a high chance of entrapped air, so open the downstream valve slowly.
5. Close the bleed screw (clockwise) on top of the meter.
6. Slowly open the outlet side gate valve until the downstream line is pressurized.
7. Slowly open the upstream ball valve on the bypass to pressurize the bypass meter.
8. Slowly open the downstream ball valve on the bypass.
After installation, put the upstream (inlet) valve in the full-open position during service.
HP PROTECTUS ® III Installation and Maintenance Guide 13
Chapter 3: Installing the HP PROTECTUS
®
III