Fisher EZR Instruction Manual page 15

SymPTOmS
If outlet pressure is increases
If inlet pressure decreases
If inlet pressure is stable
If the slam shut valve plug will not close
If the slam shut valve plug closes
If the outlet pressure is stable
If the outlet pressure increases
If the outlet pressure is stable
Table 13. Troubleshooting for Type EZR Regulator
cauSE
Internal leak
External leak
The regulator is tightshut
Operation faulty
Operation correct
Observe the evolution of the outlet pressure (control tightness)
The valve plug is tightshut
Observe the evolution of the outlet pressure (control tightness)
Internal leak
Valve plug is tightshut
Figure 13. Type EZR Maintenance Schematic
Type EZR
acTIOnS
Control the regulator valve plug
Control the regulator seat
Control the pilot
or contact after-sales
Locate and repair leak
or contact after-sales
Increase the set point until tripping occurs
(without exceeding the outlet limits)
Control the release relay
Control the slam shut valve plug
or contact after-sales
Purge the outlet side of the regulator
Control the slam shut valve plug
Control the slam shut seat
Control the bypass
or contact after-sales
B24A
B24B
15