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When using a Type SA/2 pilot supply filter
regulator, the differential pressure across
the regulator must be at least 3 bar for
optimum regulator performance. The Type
SA/2 can be removed if differential pressure
across the regulator is less than 3 bar and
inlet pressure stays at or below 13.8 bar.
Startup
Type EZH Startup:
1. Make sure all block valves, vent valves and control
line valve(s) are closed.
2. Back out the pilot adjusting screw(s).
3. Slowly open the valves in the following order:
- Inlet block valves.
- Pilot supply and control line valve(s), if used.
4. EZHSO Series Monitor Installations and all
EZH Series Installations: Crack open the outlet
block valve or bypass valve to allow minimum flow.
For EZHSO Series Single Regulator Installation:
Vent pressure from bleed line through valve R3 until
regulator closes and then shut-off vent. A full bore
NPS 1/4 ball valve for the vent line is preferred.
Slowly open downstream valve, making sure that
there is a constant sufficient pressure drop across the
regulator. If downstream pressure climbs too close to
upstream pressure, the regulator will again fully open.
In this case, start-up procedure needs to be repeated.
5. For a single regulator, set the pilot to the desired
outlet (control) pressure according to the Pilot
Adjustment procedure.
For a wide-open downstream monitor installation,
adjust the upstream working pilot until intermediate
pressure is higher than the desired setpoint of the
monitor pilot. Adjust the downstream monitoring pilot to
the desired monitoring takeover pressure. Reduce the
upstream pilot to the normal outlet pressure setting.
For a wide-open upstream monitor installation,
adjust the downstream working pilot to a setpoint
higher than the setpoint of the monitor pilot. Adjust
the upstream monitoring pilot to the desired monitoring
takeover pressure. Reduce the downstream pilot to
the normal outlet pressure setting.
Note
Types EZH and EZHSO
For a working monitor installation, adjust the
setpoint of the upstream monitor pilot to the desired
maximum pressure. Adjust the upstream working pilot
to the desired intermediate pressure setting. Adjust the
downstream pilot to a pressure setting slightly above
the upstream monitor pilot pressure setting. Adjust the
upstream monitor pilot to its desired setpoint. Establish
final desired downstream pressure by adjusting the
downstream working regulator pilot.
6. After adjusting the Type PRX pilot(s) to the desired
pressure setting(s), slowly open the downstream
block valve wide open.
7. Close the bypass valve, if used.
Type OS2 Manometric Box Set Point
Verification Procedure
Using the vent valve supply a pressure equal to the
set pressure foreseen for the regulator.
- 1
release relay stage
st
Set (Stage 1)
à
- Slam-shut valve plug
Open (Stages 2 and 3)
à
Progressively increase the pressure until
à
tripping occurs
Adjust setting if necessary (D103683X012).
à
Note the set point value on the equipment or
mark it on a commissioning document
17
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