Marshall Excelsior MEGR-1627 User manual

MEGR-1627 HIGH FLOW GAS REGULATOR
Instruction Manual- Look Inside For:
Description
Installation
Remote Vent Line Installations
Startup and Adjustment
Shutdown
Maintenance
Body Maintenance Procedures
Diaphragm & Spring Case Area Maintenance Procedures
Parts Ordering
Parts List
Marshall Excelsior Company
Marshall, MI 49068
269-789-6700
FAX [phone]
www.marshallexcelsior.com
The contents of this publication are for informational purposes only. While every effort has been made to ensure accuracy, these contents
are not to be construed as warranties or guarantees, expressed or implied, regarding the products or services described herein or for their use
or applicability. Marshall Excelsior Co. reserves the right to modify or improve the designs or specifications of such products at any time
without notice. The MEC™ logo is the trademark of Marshall Excelsior Co.
Form #914 Rev B
MEGR-1627 Instruction Manual
WARNING:These products contain a chemical
known to the state of California to cause cancer
and birth defects or reproductive harm

APPLICATIONS
•
Farm Tap Regulation
•
Monitoring Regulators
•
Gate Regulators
•
Pressure Reducing Regulators
•
Fuel Gas Regulators
•
Gas Gathering Regulators
MATERIALS OF CONSTRUCTION
Body, Bonnet, Diaphragm Case. . . . . . . . . . . . . Cast Ductile Iron Body/Aluminum Bonnet and Diaphragm Case
Diaphragm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nitrile (low pressure) or Neoprene (high pressure)
Seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Nitrile
Orifice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Aluminum
SPECIFICATIONS
Maximum Inlet:
Nitrile Seat . . . . . .1000 PSIG (ductile iron)
Outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5–500 PSIG
Port Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3/4", 1", 2" NPT
Orifice Sizes . . . . . . . . . . . . . . . . . . . . . . . . . .1/8", 3/16", 1/4", 3/8", 1/2"
Outlet Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flow Range *
5–20 PSIG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..189–28,000
15–40 PSIG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .630-44,700
35–80 PSIG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .750-89,500
70–150 PSIG . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,500-108,000
140–250 PSIG . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,000-60,000
240–500 PSIG . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,800-88,000
* (SCFH of 0.63 Propane)
Temperature Range . . . . . . . . . . . . . . . . . . .–20˚ to 180˚F (–18˚ to 82˚C)
Approximate Weight . . . . . . . . . . . . . . . . . . . . . . . . . . .1" 5.3 lbs, 2.39 kg
2" 8.8 lbs, 3.96 kg
Form #914 Rev B

DESCRIPTION
The MEGR-1627 is a self-operated pressure-reducing
regulator for both low and high pressure gas applications.
These regulators are designed to be used with compressed
gas, compressed air, and a variety of other gases.
It is recommended that a pressure relieving or limiting
device be installed as required by any appropriate code,
regulation, or standard to prevent operating conditions
from exceeding any of those limits.
INSTALLATION
Qualified personnel only should perform installation, operation,
and maintenance per NFPA 54 & 58 and other local, State and
Federal Regulations. The regulator can be mounted in any
position, however the flow through the body must be in the
direction of the arrow cast into the body surface. Also make
sure to position the regulator to prevent any contamination or
debris from entering the screened vent. Install a three-way
bypass valve should continuous operation be required during
maintenance. Prior to installation inspect the regulator and the
piping lines for any debris or contamination. After installation
periodically inspect the regulator for damage, especially after
any overpressure condition. The MEGR-1627 does not have
an internal relief, thus a pressure relieving or limiting device
must be provided to prevent the inlet pressure from exceeding
the outlet pressure limit.
STARTUP & ADJUSTMENT
When starting up the regulator, slowly open the upstream
shutoff valve, and then slowly open the downstream shutoff
valve. Check all piping and connections for leaks before
making any final pressure adjustments. The nameplate
provides the range of allowable pressure settings. For pressure
settings outside the allowable range, change to the appropriate
range spring and remember to change the nameplate
accordingly.
When installing a MEGR-1627M, make sure the control line is
attached before operating the regulator. The control line should
have a 3/8” minimum diameter, and be connected to a section
of pipe (preferably straight) a distance downstream equivalent
to approximately 10 times the diameter of the outlet piping. In
certain instances a hand valve may be needed to dampen
pulsations in the control line.
Note: The use of a pressure measuring device is highly
recommended when making any pressure adjustments with
the regulator.
REMOTE VENT LINE INSTALLATION
The MEGR-1627 is provided with a vent assembly installed in
the 3/4" NPT bonnet vent port. For remote venting, use the
largest diameter piping possible. For best results, limit the
number of bends and keep the line as short as possible. For
the regulator to operate properly, the vent opening should
remain free of any debris or foreign matter.
To make pressure adjustments, start by removing the
adjustment screw protective cap, and loosening the locknut.
Increasing the output pressure is achieved by turning the
adjustment screw clockwise, while a counterclockwise turn
decreases the output. Tighten the locknut and reinstall the
adjustment screw cap.
Form #914 Rev B
Warning!
It is not unusual for a regulator to vent some gas to
atmosphere. In applications involving flammable or
hazardous gases, it may become necessary to vent the
regulator to a safe, or remote location. These gases
may accumulate and cause property damage, or
personal injury as a result of a fire or explosion.
Periodically check the vent opening and line for any
restrictions due to clogging or condensation.
Warning!
The use of pressure gauges to prevent overpressure
conditions, which might cause personal injury or
equipment damage, is highly recommended. Before
starting up the regulator, relieve the downstream
pressure on the diaphragm. Failure to do so may result
in personal injury or equipment damage.
Warning!
Personal injury and /or property and equipment
damage may result from escaping gases if theregulator
is installed where the pressures or conditions may
exceed the limits of the regulator or the piping and
piping connections. Always install the regulator in a
safe location.

.
*The maximum inlet pressure body rating is 1000 psig for ductile iron. The maximum
valve disk inlet pressure rating is 1000 PSIG for nitrile.
Form #914 Rev B
TYPES MEGR-1627 & MEGR-1627M
Outlet Pressure
Range
Orifice Diameter (in)
Maximum Inlet
Pressure (PSIG)
Maximum Differential
Pressure (PSID)
5-20 PSIG
1/8
1000
1000
3/16
750
750
1/4
500
500
3/8
300
300
1/2
250
250
15-40 PSIG
1/8
1500*
1500*
3/16
1000*
1000*
1/4
750
750
3/8
500
500
1/2
300
300
35-80 PSIG
1/8
1500*
1500*
3/16
1750*
1750*
1/4
1500*
1500*
3/8
1000
1000
1/2
750
750
70-150 PSIG
1/8
2000*
2000*
3/16
2000*
2000*
1/4
1750*
1750*
3/8
1250*
1250*
1/2
750
750

SHUTDOWN
Replacing the Stem Assembly
(MEGR-1627):
Begin the shut down procedure by closing the nearest
upstream shutoff valve. Next close the nearest downstream
shutoff valve. Open the pressure relief valve located between
the regulator and the downstream shutoff valve. On the
MEGR-1627, pressure between the upstream shutoff valve
and the regulator will relieve through the regulator. The MEGR-
1627M requires relieving the pressure in the monitor line and
downstream of the regulator prior to performing any
maintenance.
1.
Remove the boost body (item 26), the nitrile stabilizer
(item 27), and the stem guide (item 22).
Disconnect the stem (item 24) and remove it from the
diaphragm case (item 14).
Inspect the stem o-ring (item 19), the stem backup
rings (item 20), and the diaphragm case o-ring (item
25) and replace if necessary.
Assembly is the reverse of the above procedure.
2.
3.
4.
Replacing the Stem Assembly
(MEGR-1627M):
MAINTENANCE
Severity of conditions and the requirements of both state and
federal laws determine the frequency to which the regulators
need to be inspected. Debris in the process lines, exterior
damage, and normal wear could require the replacement of
parts such as the disk assembly, seat ring, and diaphragm.
The procedures below will provide assistance when attempting
to replace these parts.
1.
Using a straight edge screwdriver, pry the throat block
(item 35) out of the diaphragm case (item 14).
Inspect the throat block o-rings (item 34), throat block
backup rings (item 36), stem o-ring (item 19), and
stem backup rings (item 20), and replace if
necessary.
Assembly is the reverse of the above procedure.
2.
3.
DIAPHRAGM & SPRING CASE AREA
MAINTENANCE PROCEDURES
BODY MAINTENANCE PROCEDURES
1.
Remove the adjustment screw cap (item 1), loosen
the locking nut (item 3) on the adjustment screw (item
2) and by turning counterclockwise release all
compression from the range spring (item 7).
Remove the bonnet build screws (item 9) and lift off
the bonnet (item 4). Range springs may be changed
at this time.
Slip the pusher post (item 13) out of the groove in the
lever (item 15) and remove the diaphragm assembly
(items 10, 11, 12, & 13).
Remove the lever screws (item 16) and remove the
lever (item 15).
Remove the diaphragm screw (item 12) to access the
diaphragm (item 11).
Inspect and replace any worn or suspect parts.
Assembly is the reverse of this procedure. Torque the
diaphragm screw to 7 ft-lbs (MEGR-1627 & MEGR-
1627M). Torque the spring case build screws to 7 ft-
lbs. (MEGR-1627 aluminum), 12 ft-lbs. (MEGR-1627
steel).
Replacing the Seat Assembly and/or Seat Orifice:
1.
Remove the build screws (item 37) to separate the
body (item 30) from the diaphragm case (item 14),
exposing the seat assembly (item 28) and seat orifice
(item 29).
Inspect the seat assembly (item 28) and the seat
orifice (item 29) for damage, and if necessary, replace
them.
To replace the seat assembly (item 28), remove the
pin clip (item 23) which holds the seat assembly in
place.
Assembly is the reverse of the above procedure. If
replacing the seat orifice (item 29), apply thread
locker (item 39) to the threads and torque to 16 ft/lbs.
(aluminum case) and 25 ft/lbs.(steel case).
2.
2.
3.
3.
4.
5.
4.
6.
7.
Form #914 Rev B
Warning !
Before performing the following steps, insure that all
spring pressure has been released from the diaphragm
case.
Warning!
When attempting any inspection or disassembly,
relieve all pressure from the regulator and its adjacent
piping so as to prevent personal injury or equipment
damage as a result of an explosion or sudden pressure
release.
Warning!
It is recommended that downstream pressure be
released prior to performing a shutdown. Property
damage or personal injury could result from an
explosion from an overpressure condition on the
diaphragm of the regulator.

PARTS ORDERING
When ordering replacement parts, always reference the Type number,
which is found on the nameplate, and the item number of each needed
part as found in the following parts list.
Form #914 Rev B
PARTS LIST
ITEM
DESCRIPTION
21
Pin, Groove
22
Stem Guide
23
Pin Clip
24
Stem
25
Diaphragm Case O-Ring
26
Boost Body
27
Stabilizer
28
Seat Assembly
29
Orifice
30
Body
31
Nameplate (not shown)
37
Build Screw
39
Thread Locker
40
Name Plate Drive Screw (2 Required)(not shown)
PARTS LIST
ITEM
DESCRIPTION
1
Cover Adj. Screw
2
Adjustment Screw
3
Locknut
4
Bonnet
5
Vent Assembly
6
Spring Guide, Upper
7
Range Spring: 5-20 PSIG-YELLOW, 15-40 PSIG-
GREEN, 35-80 PSIG-BLUE, 70-150 PSIG-RED, 140-
250 PSIG-BLUE, 240-500 PSIG-RED
8
Spring Guide, Lower
9
Build Screw, Spring Case (8 Required)
10
Diaphragm Piston
11
Diaphragm
12
Screw, Diaphragm
13
Post, Pusher
14
Diaphragm Case
15
Lever
16
Lever Screw (2 Required)
17
Pin, Lever
18
Lever Retainer
19
Stem O-Ring
20
Stem Backup Ring (2 Required)
Spring &
Diaphragm
Casing Style
MEGR-1627
MEGR-1627M
PSIG
BAR
PSIG
BAR
Maximum pressure to spring and
diaphragm casing to prevent leak to
atmosphere.
(internal parts damage may occur)
Die Cast
Aluminum
250
17.2
N/A
N/A
Maximum pressure to spring and
diaphragm casings to prevent burst of
casings during abnormal operation.
(leak to atmosphere and internal parts
may occur)
Die Cast
Aluminum
375
25.9
N/A
N/A
Maximum diaphragm casing over
pressure to prevent damage to internal
parts.
ALL
60
4.1
60
4.1

Form #914 Rev B
MEGR-1627