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EZH and EZHSO Series
For a single regulator (Figure 3), set the pilot to
the desired outlet (control) pressure according to the
For a wide-open downstream monitor installation
(Figure 5), adjust the upstream working pilot until
intermediate pressure is higher than the desired setpoint
For a wide-open upstream monitor installation
(Figure 5), adjust the downstream working pilot to a setpoint
upstream monitoring pilot to the desired monitoring takeover
For a working monitor installation (Figure 6), turn out the
adjusting screw of the downstream pilot, removing spring
of the upstream monitor pilot (Type PRX/125), removing
After adjusting the PRX Series pilot(s) to the desired
pressure setting(s), slowly open the downstream block
Shutdown
CAUTION
If the pilot bleed control line pressure is
be subjected to full inlet pressure.
Slowly close the valves in the following order:
10
Maintenance
The regulator parts are subject to normal wear and must
The frequency of inspection and replacement depends
on the severity of service conditions and on applicable
WARNING
!
To avoid personal injury or property
damage from sudden release of pressure,
isolate the regulator from the pressure
system and release all pressure from the
pilot and main valve before performing
maintenance operations.
Use proper lifting techniques, when lifting
the upper and lower actuator casings
(keys 11 and 5) off the EZH or EZHSO Series
body (key 1). The actuator assembly weighs
more than 100 lbs / 45 kg.
CAUTION
Customer cannot use another type of eyebolt
in the regulator. Only Emerson parts can be
used to repair the unit.
Eyebolts are installed to aid in the handling
and installation of the Regulator Assembly
only. Do not attempt to lift more weight than
the regulator with these eyebolts.
Polyurethane (PU) Disk Conversion
To convert EZH and EZHSO Series units to a
parts; retainer (key 31), disk assembly (key 30) and seat
Main Valve and Actuator Maintenance
Disk Maintenance
NPS 1 through 3 / DN 25 through 80
(Refer to Figures 8 and 9)
Carefully lift the upper actuator casing and lower
actuator casing assembly (keys 11 and 5) off the
For EZH Series: Remove the hex socket cap screws
Use Torque
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