Emerson EZH and EZHSO Series Pressure Reducing Regulators Manual de Instruções descarregar pdf (Página 24)

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Types EZH and EZHSO

Starting positions:

• Inlet valve à Open

• Outlet valve à Open

• Slam-shut valve plug à Open

• Regulator à In operation

Inlet and outlet side of the regulator are under pressure

Tight shut-off verication (and tripping verication for

versions with integral slam shut)

• Inlet valve à Closed

• Outlet valve à Closed

• Regulator Observe the evolution of the

outlet pressure

Control regulator tightness

SYMPTOMS CAUSE ACTIONS

If outlet pressure is stable

Observe the evolution of the inlet pressure

If inlet pressure decreases External leak

Locate and repair leak

or contact after-sales

If inlet pressure is stable 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 Operation faulty

Control the release relay

Control the slam-shut valve plug

or contact after-sales

If the slam-shut valve plug closes Operation correct Bleed off outlet side

Close the vent and observe the evolution of the outlet pressure

If the outlet pressure increases Valve plug internal leak

Control the release relay

Control the valve plug and slam-shut orice

or contact after-sales

If the outlet pressure is stable The valve plug is tightshut

If the outlet pressure increases Internal leak Close pilot feed

If the outlet pressure stabilises Pilot leak

Control the pilot valve plug

or contact after-sales

If the outlet pressure increases Regulator internal leak

Control valve plug and orice

or contact after-sales

Table 9. Troubleshooting for Types EZH and EZHSO Regulators

A108

TROUBLESHOOTING

Servicing Check

Operations concerning the integral slam-shut version are in italic

Recommended frequency:

• 2 times per year

Verication:

• Set point verication

• Regulator valve plug tightness

• Tripping and setpoint value

• Slam-shut valve tightness

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 35 36

Types EZH and EZHSO 1
LABELLING 5

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Emerson EZH and EZHSO Series Pressure Reducing Regulators Manual de Instruções Página 24

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