Model GP-2000R
Back Pressure Regulator
Installation, Operation
and Maintenance Instructions
This bulletin should be used by experienced personnel as a guide to the installation of the Model GP-2000R Back
Pressure Regulator. Selection or installation of equipment should always be accompanied by competent technical
assistance. You are encouraged to contact Armstrong International, Inc. or its local representative for additional
information.
1.
An Armstrong Inverted Bucket Steam Trap is
recommended to drain condensate at inlet of regulator
if required.
2.
An Armstrong Y-Strainer (100 mesh) should be
installed before the regulator to reduce the chance of
dirt fouling.
3.
Pressure gauges should be installed before the
regulator. The upstream gauge should be installed in
or near the control pipe.
4.
Control pipe connections go into ¼” tapping on the
side of the pilot valve. Be certain the pipe is pitched
away from the regulator. Erratic control could result if
this is not done. Control pipe length should be a
minimum of 10 inlet pipe diameters.
5.
By-pass line around regulator will allow manual relief
while valve is being serviced.
6.
Install regulator with diaphragm down and with flow in
the direction of the arrow on the body.
Installation Instructions
Bulletin No. AY-708
Typical Back Pressure Regulator Installation
Control Pipe
(Pitch Down)
Gate
Valve
Minimum of 10 Inlet
Pipe Diameters from
PRV to Last Valve
or Fitting
GP-2000R
Armstrong
Strainer
From Low Pressure
Flash System
