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Types EZH and EZHSO
Europe, Middle East and
Africa Only
INTRODUCTION
Scope of the Manual
This manual provides installation, startup, maintenance
and parts ordering information for the Types EZH and
EZHSO pressure-reducing regulators and Type PRX
pilot with Type SA/2 pilot supply filter regulator.
Information on other equipment used with this regulator
is found in separate manuals.
Product Description
Types EZH and EZHSO regulators are accurate pilot-
operated pressure balanced, soft-seated regulators.
They are designed for use in high pressure natural gas
transmission/city gate stations, large capacity distribution
systems and power plant feeds. They provide smooth,
reliable operation, tight shutoff and long life.
Type EZHSO "Spring-to-Open" version could be used
when other overpressure protection options are foreseen,
for example in a monitor configuration. In this case, in
event of failure, the main regulator will stay completely
open, allowing the monitor to take control. The monitor
could be "Spring-to-Close" to ensure a double protection
to downstream pipe.
Available Configurations:
• Types EZH and EZHSO ("E Body")
Single regulator without slam shut
• Types EZH and EZHSO ("X Body")
Single regulator in an X Body available for DN 25
through 150 sizes.
In case of modification made on a pressure equipment
like cap replacement by a slam shut it is mandatory
to comply to the local codes, rules and regulations.
Contact us imperatively.
• Types EZH OS2 and EZHSO OS2 ("X Body")
Single regulator with integrated slam shut available
for DN 25 through 150 sizes
• Type PRX/120-AP:
Outlet pressure range of 30 to 80 bar. The
Type PRX/120-AP can be used as the pilot on single
stage pressure reducing regulators, as the monitor pilot
or as the working pilot in wide-open monitor systems.
• Type PRX/125:
Identical to the Type PRX/120, except the restriction
screw is removed. The Type PRX/125 can only
be used as the monitor override pilot on working
monitor applications.
• Type PRX/125-AP:
Identical to the Type PRX/120-AP, except the restriction
screw is removed. The Type PRX/125-AP can only be
used as the monitor override pilot on working monitor
applications.
• Type PRX/131:
Set pressure range of 1.00 to 30.0 bar. The Type
PRX/131 is used as a booster or quick dump pilot to
increase main valve closing speed on a single stage
pressure reducing regulator or on the monitor regulator
in wide-open monitor systems.
• Type SA/2 Pilot Supply Filter Regulator:
The Type SA/2 pilot supply filter regulator provides a
constant pressure supply to the PRX Series pilot of 3 bar
over the set pressure. The Type SA/2 has an integral
5-micron filter. For easy maintenance a block valve
can be installed to separate the regulator from the pilot.
Pilot Description
Type PRX Pilot
The Types EZH and EZHSO pressure-reducing regulators
can be equipped with a PRX Series pilot mounted on the
main valve for pressure reducing or wide-open monitoring
applications. The PRX Series pressure reducing pilots
have the ability to handle a wide range of setpoints from
1 to 80 bar:
• Type PRX/120:
Outlet pressure range of 1 to 40 bar. The Type PRX/120
can be used as the pilot on single stage pressure
reducing regulators, as the monitor pilot or as the
working pilot in wide-open monitor systems.
