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Type EZR
Verify the absence of pressure between inlet and
outlet valves
• Slam shut valve plug
- Closed
• Type PRX Pilot (a)
- Unloaded
Slam Shut Setpoint Verification
Disconnect the BMS impulse, inject a pressure to the BMS
equal to the pressure required for the regulator
Triggered position
Stage 1
• 1
release relay stage
st
- Set (Stage 1)
• Slam shut valve plug
- Open (Stages 2 and 3)
- Progressively increase the BMS pressure to reach
tripping
- Adjust setting if necessary (NTAOS2)
Note the set point value on the equipment or mark it
on a commissioning document
Positions before Startup
• Slam shut valve plug
- Closed
• Servicing valve
- Closed
The equipment is ready for Startup
Startup
(act slowly)
• Inlet valve
- Open very slowly
• 1
release relay stage
st
- Set (Stage 1)
• Slam shut valve plug
- Bypass (Stage 2)
- Adjust Type PRX setting to increase outlet pressure if
necessary
- Open (Stage 3)
• Servicing valve
- Open slightly
12
• Type PRX Pilot (a)
• Outlet valve
• Servicing valve
The equipment is started
It is recommended to seal the release relay
maInTEnancE
Operations concerning the integral slam shut version are
in italic.
Servicing check (Figure 12)
Recommended frequency:
B20
• Twice yearly minimum
Verification:
Stages 2 and 3
• Set point verification
• Regulator valve plug tightness
• Tripping and set point value
• Slam shut valve tightness
departure positions
• Inlet valve
• Outlet valve
• Slam shut valve plug
• Regulator
Inlet and outlet sides of regulator are under pressure
Tight shutoff verification (and tripping verification for
integral slam shut versions)
• Inlet valve
• Outlet valve
• Regulator
Filter verification
• Purge the filter (c)
• Verify the felt
- Adjust setting to outlet pressure required
- Open slowly
- Closed
Observe the evolution of the outlet
pressure (control regulator tightness)
Open
Open
Open
In operation
Closed
Closed
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