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.
