Emerson Fisher EZR series - Maintenance

Maintenance
Operations concerning the integral slam shut version are in italic.
Servicing Check
Recommended frequency:
• Twice yearly minimum
Verication:
• Set point verication
• Regulator valve plug tightness
• Tripping and set point value
• Slam shut valve tightness
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verication(and tripping verication for
integral slam shut versions)
• Inlet valve Closed
• Outlet valve Closed
• Regulator Observe the evolution of the outlet
pressure (control regulator tightness)
Filterverication
• Purge the lter C
• Verify the cartridge
If the outlet pressure increases Internal leak
Control the regulator valve plug
Control the regulator orice
Control the pilot or contact after-sales
If the outlet pressure decreases External leak
Locate and seal the leak or contact after-sales
If the outlet pressure is constant The regulator is tightshut
Increase the set point until tripping occurs
(without exceeding the outlet limits)
If the slam shut valve plug will not close Operating fault
Control the release relay
Control the slam shut valve plug or contact after-sales
If the slam shut valve plug closes Operating correctly
Observe the evolution of the outlet pressure (control tightness)
If the outlet pressure is constant
Purge the outlet side of the regulator
Observe the evolution of the outlet pressure (control tightness)
If the outlet pressure increases Internal leak
Control the slam shut valve plug
Control the slam shut orice
Control the bypass or contact after-sales
If the outlet pressure is constant Slam shut valve plug is tightshut
Table 12. Troubleshooting for Types EZR and EZR-OS2 Regulators
Type EZR
10
Europe, Middle East and Africa Only