Dresser Series D Installation Supplement
© 2019 Natural Gas Solutions North America, LLC
Page 11 of 24
6
Meter Startup
After proper installation and leveling of the meter, as described in Section 5, perform the following steps
to start up the meter:
Slowly open the meter inlet valve just enough to allow gas into the meter.
This gas flow allows the meter to pressurize. The RPM Wheel may start to rotate during this process.
CAUTION
Do not exceed five (5) psig/second (35 kPa/second) maximum when pressurizing the meter.
Rapid pressurization can cause an over-speed condition, which may damage the meter. Resulting
damage is not covered by warranty.
Open the bypass and outlet (downstream of meter) gas valves.
Partially open the meter inlet gas valve until the meter starts operating at low speed. Throttling of the
bypass valve might be necessary to initiate gas flow through the meter.
Verify gas is flowing though the meter by watching for movement of the RPM Wheel to indicate
impeller rotation, and then proceed depending on the results:
•
If movement is present, go to Step 5.
•
If the RPM Wheel is not turning, verify gas is being delivered to the meter.
•
If gas is flowing to the meter inlet and the RPM Wheel is not moving, go to Step 6.
Let the meter operate at low speed for several minutes. Listen closely for unusual scraping or
knocking sounds:
•
If unusual sounds are present, go to Step 6.
•
If the meter is operating normally, go to Step 7.
If unusual sounds are present or the RPM Wheel is not turning, place the meter in bypass. Slowly
depressurize and vent all pressure from the meter set before checking for piping misalignment, piping
strain, torsion, or other related problems. After the problem has been resolved, repeat the startup
procedure starting from Step 2.
WARNING
Do not adjust or work on the meter before slowly depressurizing and venting all pressure from
the meter set in accordance with company procedures or industry guidelines.
When the meter is operating smoothly, slowly open the inlet valve until a full line flow is passing
through the meter and the inlet valve is fully open.
Slowly close the bypass valve.
After the meter is pressurized, follow your company’s authorized procedures or common industry
practices to leak test the meter and all pipe connections. Soapy water, Snoop®, or gas analyzers are
