Installation - GE Mooney Flowgrid Instruction Manual

Installation

PERSONNEL: Installation of the Flowgrid regulator
1.
should be made by qualified personnel familiar with
high pressure piping and pilot operated regulators.
WARNING
Personal injury, equipment damage, or leakage due
to explosion of accumulated gas or bursting of pres-
sure containing parts may result if this regulator is
overpressured or is installed where service conditions
could exceed the limits given in the specification of
this manual or on the nameplate, or where conditions
exceed any ratings of the adjacent piping or piping
connections. Verify the limitations of both regulator
and pilot to ensure neither device is overpressured.
To avoid such injury or damage, provide pressure
relieving or pressure limiting devices (as required
by Title 49, Part 192, of the U.S. code of Federal
Regulations, by the National Fire Codes of the
National Fire Protection Association, or applicable
codes) to prevent service conditions from exceed-
ing those limits. Additionally, physical damage to
the regulator/regulator could break the pilot off the
main regulator, causing personal injury and/or prop-
erty damage due to explosion of accumulated gas. To
avoid such injury and damage, install the regulator
in a safe location.
PRIOR INSPECTION: Inspect the main regulator,
2.
pilot, and tubing for any damage that might have
occurred in shipping. Make sure the body, pilot lines,
and inlet piping are clear and free from foreign
material.
ORIENTATION: The Flowgrid regulator may be
3.
installed in any position - the best position being one
that provides easiest access for pilot adjustment
and regulator maintenance.
SCREWED END REGULATORS: Apply pipe
4.
compound to the male threads starting one or two
threads back from the end prior to assembling the
joint.
FLANGED END REGULATORS: Use suitable line
5.
gaskets and good bolting practices with flanged
bodies. A crisscross pattern of incrementally
tightening the line bolts is recommended.
WELD END BODIES: Remove the Spring Case and
6.
all trim parts including diaphragm and O-rings
before welding a buttweld and/or a socket weld
end Flowgrid regulator. Electric arc welding is
recommended to minimize heat build-up on the
body assembly. Reassemble regulator (refer to the
Maintenance section of this manual for Disassembly
and Assembly procedures) and pressurize with air
to check for leaks prior to putting the regulator in
service.
6 | GE Oil & Gas
WARNING
Gas Regulators installed in confined or enclosed
spaces should be provided with adequate ventilation
to prevent the possibility of gas buildup or accumula-
tion from leaks and venting. Leaks or vented gas may
accumulate causing personal injury, death, or property
damage. Pilot spring cases and the regulator enclosure
should be vented to a safe area away from air intakes,
or any hazardous location. The vent lines and stacks
must be protected against condensation and clogging.
PILOT SUPPLY LINES: Run a 3/8" or 1/2"pilot supply
7.
line from the regulator body connection on the inlet
side of the Flowgrid regulator to the pilot supply
Filter or directly to the pilot Restrictor.
NOTE: A shutoff regulator is not required in the supply
to the pilot, but if one is installed it should be a full
opening ball regulator type.
A TYPE 30 FILTER in the pilot supply line is recom-
8.
mended to clean dirt and other particulates that
could affect the restrictor or variable orifice in the
pilot. Use a 1/4" nipple to mount the filter to the
body tap on the Flowgrid regulator.
FILTER OUTLET: Run 3/8" tubing or 1/4" pipe from
9.
the filter OUTLET port to the INLET side of the restric-
tor in the pilot system of the regulator. The TYPE
30/30A/30S FILTER has two OUTLET ports for ease of
tubing. Block the other port with the plug provided or
mount a gage to monitor inlet pressure if desired.
NOTE: To avoid galling when stainless steel to stain-
less steel connections are made use a lubricant (such
as NEVER SEEZ by Bostik). For best results Lightly
lubricate the female threads. Mixing the lubricant with
pipe dope is also acceptable. Do not exceed more than
1/4 turn past the point the threads start to bind.
10. PILOT GAS HEATERS (OPTIONAL): Pilot supply gas
can be heated to prevent the formation of ice or
hydrates in the pilot system. Pilot supply gas heaters
should be connected after the pilot filter (if one is
used). Do not directly heat to entire Flowgrid
regulator to prevent freezing; internal rubber
components can be heated beyond their max
temperature rating causing potential damage.
11. SENSE LINES (CONTROL LINES): Sense lines should
be run from the pilot mounted on the Flowgrid
regulator to a point 8 to 10 pipe diameters away
from the regulator (Refer to Piping Schematics). Use
Table 5 as a guide for the ideal tubing to use. Reduce
as necessary to connect to the pilot.
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