Emerson EZR Series Pressure Reducing Regulator Bedienerhandbuch PDF herunterladen (Seite 10)

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Type EZR

Verify the absence of pressure between inlet and

outlet valves

Slam shut valve plug•

Closed -

PRX Pilot (

• A)

Unloaded

Slam Shut Setpoint Verication

Disconnect the BMS impulse, inject a pressure to the BMS

equal to the pressure required for the regulator

B20

Triggered position

Stage 1

Stages 2 and 3

1•

release relay stage

Set (Stage 1) -

Slam shut valve plug

•

Open (Stages 2 & 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

•

release relay stage

Set (Stage 1)

Slam shut valve plug

•

Bypass (Stage 2) -

Adjust PRX setting to increase outlet pressure if

necessary

Open (Stage 3)

Servicing valve

•

Open slightly -

PRX Pilot (

• A)

Adjust setting to outlet pressure required

Outlet valve

•

Open slowly -

Servicing valve

•

Closed -

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:

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 • a Open

Outlet valve • a Open

Slam shut valve plug • a Open

Regulator• a In operation

Inlet and outlet sides of regulator are under pressure

Tightshutoffverication(and tripping verication for inte-

gral slam shut versions)

Inlet valve • a Closed

Outlet valve • a Closed

Regulator Observe the evolution of the outlet •

pressure (control regulator tightness)

Filterverication

Purge the lter (• C)

Verify the felt•

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 16 17 18

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