Marshall Excelsior MEC MEGR-167CH 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 #906 Rev A
MEGR-167CH/CW & MEGR-167CN GAS REGULATOR
Instruction Manual- Look Inside For:
Description
Installation
Operation
Maintenance
Parts Ordering
Parts List
Marshall Excelsior Company
Marshall, MI 49068
269-789-6700
FAX [phone]
www.marshallexcelsior.com
MEGR-167CH/CW & MEGR-167CN Instruction Manual

Form #906 Rev A
ATTENTION:
The installation of these devices must be in accordance with NFPA standards No. 54 & 58, along with all
federal, state, and local codes. All personnel installing these devices should be trained on the hazards
associated with combustible gases and fluids. MEC assumes no responsibility from damage, injury, or death
that may result from servicing, altering, or the improper installation of this regulator.
OPERATION:
The MEGR-167CH/CW & MEGR-167CN are high pressure (pounds to pounds), industrial gas regulators.
They are designed to conform to UL Standard 144 for use with gas. The maximum supply pressure is 250
PSIG. The maximum output pressure is printed on the regulator nameplate. These regulators are not intended
for use in low-pressure applications below 3 PSIG. Operating temperature ranges are between 0° and 160° F.
The MEGR-167CH/CW regulators are field adjustable with a 5/16" wrench. The MEGR-167CN is factory
preset and is not intended for field adjustment. This preset pressure is printed on the regulator nameplate.
NOTE: It is strongly recommended that a pressure measuring device be installed on the outlet of the
regulator during adjustment to ensure that the regulator is not adjusted beyond the output pressure
range listed on the regulator nameplate. The regulator should not be used to regulate pressure above
what is recommended.
INSTALLATION:
Ensure all gas lines are free from dirt and scale before installation is made. Shut off the gas. The gas
regulator can be mounted at any angle without affecting operation. The inlet and outlet ports for all of these
gas regulators are 1/4" NPT.
Install the regulator as close as possible to the system 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. Internal damage to the regulator may result from the regulator being installed backwards. The 1/4"
NPT gauge port can also be used as an optional output port, but with decreased flow delivery.
Before putting the MEGR-167CH/CW regulators into service for the first time, relieve compression on the
range spring by turning the adjustment assembly counter clockwise. (Since the MEGR-167CN is preset at
the factory it cannot be adjusted in the field.) It is recommended that the gas supply be introduced slowly to
the regulator. After gas is applied to the regulator, check installation to ensure that there is a bubble tight seal.
This can be accomplished by using a leak detector or applying a small amount of soapy water at the
connection points. To operate, turn the adjustment assembly slowly in a clockwise direction until the required
downstream pressure is obtained. Turned in this direction, the range spring is compressed thus causing
increased output pressure.
CAUTION: These gas regulators are non-relieving regulators and thus cannot exhaust excess pressure
at the regulator. Use of a relief device upstream or downstream of these regulators is recommended in
accordance with NFPA 58. In order to establish an accurate output pressure from the regulator, it will
be necessary to cycle downstream flow or to set the regulator at a slight flow.

Form #906 Rev A
MAINTENANCE:
Because these regulators are 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.
Ordering and Technical Information Typical Vapor
Capacity
Part Number Adjustment Range* Recommended
Operating Range*
Propane Gas
Capacity in
BTU/HR**
MEGR-167CH
0-30 PSIG 3-30 PSIG 1,500,000
0-60 PSIG 6-60 PSIG 2,150,000
0-120 PSIG 12-120 PSIG 1,300,000
0-10 PSIG 3-10 PSIG 700,000
MEGR-167CN
0-20 PSIG 2-20 PSIG 800,000
20-40 PSIG 20-40 PSIG 2,150,000
40-60 PSIG 40-60 PSIG 1,250,000
*Although the regulator can be shut off, the recommended operating ranges are between 10% and 100% of the
adjustment range. Regulators should not be adjusted beyond 100% of the adjustment range.
** Typical Vapor Capacities are based on 100 PSIG inlet pressure, set point at 50% of output range with 20%
droop.

Form #906 Rev A
MEGR-167CH
MEGR-167CN
Physical Data
Part Number Weight
MEGR-167CH 0.82 lbs
MEGR-167CN 0.69 lbs