Maintenance - Emerson Fisher EZR series Instruction Manual

Type EZR

Maintenance

Operations concerning the integral slam shut version are in italic.
Servicing Check
Recommended frequency:
• Twice yearly minimum
Verification:
• Set point verification
• Regulator valve plug tightness
• Tripping and set point value
• Slam shut valve tightness
If the outlet pressure increases Internal leak
If the outlet pressure decreases
If the outlet pressure is constant
If the slam shut valve plug will not close
If the slam shut valve plug closes
Observe the evolution of the outlet pressure (control tightness)
If the outlet pressure is constant
Observe the evolution of the outlet pressure (control tightness)
If the outlet pressure increases
If the outlet pressure is constant
Filter verification
•
Purge the filter C
•
Verify the cartridge
10
Table 12. Troubleshooting for Types EZR and EZR-OS2 Regulators
Departure positions
•
Inlet valve Open

•
Outlet valve Open

•
Slam shut valve plug Open

•
Regulator In operation

Inlet and outlet sides of regulator under pressure
Tightshut verification (and tripping verification for
integral slam shut versions)
•
Inlet valve Closed

•
Outlet valve Closed

•
Regulator Observe the evolution of the outlet
pressure (control regulator tightness)
Control the regulator valve plug
Control the regulator orifice
Control the pilot
External leak
Locate and seal the leak
The regulator is tightshut
Increase the set point until tripping occurs
(without exceeding the outlet limits)
Operating fault
Control the release relay
Control the slam shut valve plug
Operating correctly
Purge the outlet side of the regulator
Internal leak
Control the slam shut valve plug
Control the slam shut orifice
Control the bypass
Slam shut valve plug is tightshut
or contact after-sales
or contact after-sales
or contact after-sales
or contact after-sales