Mec MEGR-6120 Series User manual

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 #976 Rev A
MEGR-6120 GAS REGULATOR
Instruction Manual- Look Inside For:
Description
Installation
Operation
Maintenance
Parts Ordering
Marshall Excelsior Company
Marshall, MI 49068
269-789-6700
FAX [phone]
www.marshallexcelsior.com
MEGR-6120 Instruction Manual

Form #976 Rev A
ATTENTION:
The installation of this device must be in accordance with NFPA standards No. 54 & 58, along with all
federal, state, and local codes. All personnel installing this device should be trained on the hazards
associated with combustible gases and fluids. MEC assumes no responsibly from damage or injury
that may result from servicing or the improper installation of this regulator.
OPERATION:
The MEGR-6120 is a high capacity, pounds to pounds, industrial gas regulator. It is designed to
conform to UL Standard 144 for use with LP Gas. The maximum supply pressure is 250 PSIG. The
maximum output pressure is printed on the regulator nameplate. This regulator is not intended for use
in pressure applications below 3 PSIG. The operating temperature range is -40° to +200° F.
INSTALLATION:
Ensure all gas lines are free from dirt and scale. Shut off the gas. The MEGR-6120 can be mounted at
any angle without affecting operation. Install the regulator as close as possible to the instrument that it
is to supply. Avoid using undersized fittings that will limit the flow through the regulator and cause
downstream pressure drop. Apply a minimum amount of pipe compound to the male threads of the
inlet and outlet piping. The words "IN" and "OUT" are cast into the body of the regulator to indicate the
direction of flow. The regulator must be oriented in the correct flow direction or internal damage to the
regulator may occur. The two 1/4" NPT gauge ports marked "GA" can also be used as optional output
ports, but with decreased flow delivery. Before putting the regulator into service for the first time,
relieve compression on the range spring by turning the "T" handle counter clockwise. After gas is
applied to the regulator, check installation to ensure that there is a leak tight seal. To operate, turn the
"T" handle slowly in a clockwise direction until the required downstream pressure is obtained.
CAUTION:
The MEGR-6120 is a non-relieving regulator and thus cannot exhaust excess pressure
at the regulator. In order to establish an accurate output pressure it may be necessary
to cycle the downstream flow or to set the regulator at a slight flow.
MAINTENANCE:
Because the MEGR-6120 is assembled and tested at the factory to conform to UL Standard 144, any
maintenance or repair should be in accordance with this listing as well as any other applicable
regulations. Regulator parts showing wear should be replaced as necessary. The procedure below
describes how to disassemble the MEGR-6120 for parts replacement and inspection. Assembly is
the reverse of this procedure.
1. Turn the adjustment screw
counterclockwise to remove spring tension.
2. Loosen the six build screws and separate
the bonnet from the body.
3. Remove the spring guide and spring.
4. Unscrew the diaphragm assembly from the
pintle assembly.
5. Loosen, by turning counterclockwise, and
remove the O-Ring and bottom plug.
6. Remove the pintle spring and pintle
assembly.

HIGH PRESSURE REGULATORS
MEGR-6120 & MEGR-6121 SERIES
MEGR-6120 & MEGR-6121 Specicaons:
Type: Adjustable or Fixed / PSI
Max. Inlet Pressure: 250 PSIG (17,2 bar)
Inlet Connecon: 1/4” FNPT
Outlet Connecons: 1/4” FNPT
Gauge Port: 1/4” FNPT
Exterior Finish: Red Wet Coat
Diaphragm: Fabric Reinforced Buna N
Body/ Bonnet Material: Die Cast Aluminum
Liquid Capacity: 3-5 GPH
Lisngs: UL LISTED / UL 144
For Your Local Marshall Excelsior Distributor Call 269-789-6700,
Fax [phone] or E-mail: [e-mail]
www.marshallexcelsior.com
Adjustable Congurations
Part No. Description
MEGR-6120-30 High Pressure Adjustable Reg 1-30 PSI - 1/4” FNPT Inlet/Outlet
MEGR-6120-60 High Pressure Adjustable Reg 1-60 PSI - 1/4” FNPT Inlet/Outlet
MEGR-6120-100 High Pressure Adjustable Reg 1-100 PSI - 1/4” FNPT Inlet/Outlet
Non-Adjustable Congurations
Part No. Description
MEGR-6121-05 High Pressure Fixed Reg 5PSI - 1/4” FNPT Inlet/Outlet
MEGR-6121-10 High Pressure Fixed Reg 10PSI - 1/4” FNPT Inlet/Outlet
MEGR-6121-20 High Pressure Fixed Reg 20PSI - 1/4” FNPT Inlet/Outlet
MEGR-6121-30 High Pressure Fixed Reg 30PSI - 1/4” FNPT Inlet/Outlet
MEGR-6121-40 High Pressure Fixed Reg 40PSI - 1/4” FNPT Inlet/Outlet
MEGR-6121-50 High Pressure Fixed Reg 50PSI - 1/4” FNPT Inlet/Outlet
MEGR-6121-60 High Pressure Fixed Reg 60PSI - 1/4” FNPT Inlet/Outlet
Applicaon:
The MEGR-6120 Series are UL LISTED high-pressure regulators that meet a variety of applications for liquid or vapor
service. The compact body design makes these regulators parcularly useful in installaons with space limitaons. The basic
MEGR-6120 Series regulators come equipped with a handwheel adjustment. The non-adjustable ME6121 Series provides a
tamper-resistant spring case and one of seven xed setpoints: 5, 10, 20, 30, 40, 50, or 60 PSI.
The MEGR-6120 & MEGR-6121 Series are UL listed as high pressure, non-relief regulators. Both MEGR-6120 & MEGR-6121 Series
regulators contain brass materials that are not compable with anhydrous ammonia service.
CAPACITIES: BTU/H LPG (VAPOR)
Outlet Set
Point
Inlet
Pressure BTU / HR
15 PSI
15 PSI
15 PSI
50 PSI
100 PSI
150 PSI
850,000
1,700,000
2,500,000
20 PSI
20 PSI
50 PSI
100 PSI
900,000
1,800,000
40 PSI
40 PSI
100 PSI
150 PSI
1,500,000
2,000,000
50 PSI
50 PSI
50 PSI
100 PSI
150 PSI
200 PSI
1,300,000
1,800,000
2,300,000
*Approximate BTU/H vapor capacities taking
10-20% droop into consideration
Note: Side Outlet Connection Style (Plugged):
1/4” MNPT, pressure gauge (MEJ500 Series)
can be installed
MEGR-6120
Series
MEGR-6121
Series