G100 Series
©Emerson Process Management Regulator Technologies, Inc., 2001, 2015; All Rights Reserved
The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners. Fisher is a mark owned by Fisher Controls International LLC,
a business of Emerson Process Management.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or
guarantees, express or implied, regarding the products or services described herein or their use or applicability. We reserve the right to modify or improve the designs or specifications of such
products at any time without notice.
Emerson Process Management Regulator Technologies, Inc. does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and
maintenance of any Emerson Process Management Regulator Technologies, Inc. product remains solely with the purchaser.
For further information visit www.fisherregulators.com
LPG Equipment
Emerson Process Management
Regulator Technologies, Inc.
USA - Headquarters
McKinney, Texas 75070 USA
Tel: +1 800 558 5853
Outside U.S. +1 972 548 3574
!
WARNING
Trained personnel should test the back check
valve in a safe location.
To ensure that the valve is still functional,
back check closure should be checked
annually if there is no other regularly
scheduled test program.
Maintenance
Annually TEST back check valve for closure. Back check valves
are non-repairable. Replace non-functioning valves.
1. Brass valves are not suitabe for NH
3
applications.
2. Manually operate the back check valve’s poppet
before installation to assure parts were not damaged in
shipment or blocked with dirt or foreign material.
3. Install valve so that arrow points in the direction of flow
through the valve.
4. Use pipe dope on the main threads of the valve or
the pipeline. Polytetrafluoroethylene (PTFE) tape or
PTFE pipe dope compound is recommended for the
male threads of the larger valves such as the 2 and
3 in. sizes.
5. Test the valve for proper operation after installation and
before placing the system into full service. To make the
test, pressure the system through the back check valve
and then quickly bleed pressure from the valve inlet
piping. Check for pressure build-up in the inlet piping.
On soft seated valves, there should be no build-up
in the inlet side. On metal-to-metal seated valves, a
slow pressure build-up is permissible. A rapid pressure
build-up on either valve style indicates that the valve
has malfunctioned.
SEAT CONSTRUCTION
OUTLET CONNECTION,
IN.
INLET CONNECTION,
IN.
PROPANE FLOW CAPACITY AT
10 psig / 0.69 bar
DIFFERENTIAL PRESSURE
TYPE NUMBER
Brass
Steel
Metal-to-Metal
3/4 FNPT
3/4 MNPT
21 GPM / 79.5 l/min
G100
- - - -
1-1/4 FNPT
1-1/4 MNPT
55 GPM / 208 l/min
G101
- - - -
2 FNPT
2 MNPT
150 GPM / 568 l/min
G102
G112
2 FNPT
2 FNPT
150 GPM / 568 l/min
G109
- - - -
3 FNPT
3 MNPT
250 GPM / 946 l/min
- - - -
G104
Soft Seat
2 MNPT and 1-1/4 FNPT
2 MNPT
137.5 GPM / 520 l/min
- - - -
G105
2 MNPT
3 FNPT
254 GPM / 961 l/min
- - - -
G106
3 MNPT and 2 FNPT
3 MNPT
254 GPM / 961 l/min
- - - -
G107
Specifications
This section lists the specifications for the G100 Series valve. Factory specifications are stamped on the nameplate fastened on
the valve at the factory.
Maximum Operating Pressure:
250 psig / 17.2 bar
