Dresser Model 10C25 Series K Installation, Operation, and Maintenance Manual
© 2018 Natural Gas Solutions North America, LLC
Page 13 of 74
6.1.3
Piping Configurations
Figure 8: Top inlet (vertical)
Figure 9: Side inlet (horizontal)
The line mounted Dresser 10C25 meter can be installed in either a top inlet (vertical), a side inlet
(horizontal), or a bottom inlet (vertical) configuration.
A top inlet in a vertical pipe line with gas flow downward is the preferred or recommended installation.
The top inlet mounting allows gravity to pass dirt, pipe scale, or other debris through the meter.
A 60 mesh screen is recommended in the inlet connection.
CAUTION
•
To avoid accumulation of condensate and foreign materials in the metering chamber, do not
install the meter lower than the discharge pipe run. Use a screen or strainer upstream of the
meter to remove liquids and foreign matter (pipe sealant, tape, weld slag, etc.) from the gas
stream. A 60 mesh screen is recommended.
•
Do not install a lubricated gas valve directly before a meter; excess valve lubricant or other
foreign material can stop impeller rotation.
A meter bypass allows the meter to be tested by using a transfer prover while it is mounted in line.
If over-speed conditions can occur, a restricting flow orifice plate should be installed two to four (2
–
4)
pipe diameters downstream of the meter outlet. Contact Dresser Meters and Instruments for sizing,
pricing, and availability. The warranty does not cover over-speed conditions.