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EZH and EZHSO Series
The decision to use either an upstream or downstream
monitoring system is largely a matter of personal preference
a higher outlet pressure setting, the monitor regulator senses
a pressure lower than its setpoint and tries to increase outlet
the monitoring regulator assumes control and holds the
Figure 5 shows an upstream wide-open monitor Type EZH
(failed-close) and a downstream active regulator
Type EZHSO regulator no longer controls downstream
pressure, it will remain open, causing the Type EZH
monitor regulator to take control of the downstream
will go closed and protect the downstream system from an
Working Monitoring System (Figure 6)
The additional pilot permits the monitoring regulator to act
as a series regulator to control an intermediate pressure
pilot controls the intermediate pressure and the monitoring
regulator fails, the monitoring pilot will sense the increase in
Working monitor installations require an EZH or
EZHSO Series main valve with a Type PRX/120 or
PRX/120-AP working pilot and a Type PRX/125 or
PRX/125-AP monitoring pilot for the upstream
regulator and an EZH or EZHSO Series with the
appropriate Type PRX/120 or PRX/120-AP pilot for the
Installation
!
Personal injury or equipment damage, due
to bursting of pressure-containing parts may
result if this regulator is overpressured or
is installed where service conditions could
section and on the appropriate nameplate
or where conditions exceed any rating of
the adjacent piping or piping connections.
To avoid such injury or damage, provide
pressure-relieving or pressure-limiting
devices to prevent service conditions
from exceeding those limits. Also, be sure
WARNING
the installation is in compliance with all
applicable codes and regulations.
Additionally, physical damage to the
regulator could break the pilot off the
main valve, causing personal injury
and property damage due to bursting of
pressure-containing parts. To avoid such
injury and damage, install the regulator in a
.
safe location
All Installations
An EZH or EZHSO Series regulator bleeds no gas to
atmosphere during normal operation, making it suitable
for installation in pits and other enclosed locations without
experience should install, operate and maintain a
Eyebolts are installed to aid in the handling
and installation of the Regulator Assembly
only. Always utilize both eyebolts and do not
attempt to lift more weight than the regulator
with these eyebolts.
installed in any position, but it is normally installed in a
Apply pipe compound to the external pipeline threads
before installing a regulator with threaded NPT end
connections, remove trim before welding and make sure
!
A regulator may vent some gas to the
gas service, vented gas may accumulate,
causing personal injury, death or property
line(s) from the regulator pilot(s) to a remote,
safe location away from air intakes or any
hazardous location. The end of the vent line
or stack opening must be pointed down and
protected against condensation or clogging.
CAUTION
WARNING
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