Emerson EZH and EZHSO Series Pressure Reducing Regulators Instrukcja Obsługi Pobierz pdf (Strona 15)

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Types EZH and EZHSO

Wide-Open Monitor Regulator

1. Follow the procedures in the All Installations section,

and then continue with step 2 of this section. The

sense and bleed control lines of both the upstream and

downstream pilots will be connected to the downstream

piping (see Figure 13).

2. Connect the pilot supply line for the downstream

regulator to the outlet "R" port of the Type SA/2 pilot

supply lter regulator.

Working Monitor Regulator

1. Follow the procedure in the All Installations section, and

then continue with step 2 of this section. The sense line

of the upstream monitor pilot and the bleed and sense

lines of the downstream pilot will be connected to the

downstream piping (see Figure 14).

2. Connect an inlet supply line from the upstream piping

to the inlet "M" port of the downstream Type SA/2 pilot

supply lter regulator.

3. Connect a control (sense) line from the "A" port of the

upstream working Type PRX pilot to the intermediate

pressure portion of piping, using 8/10 (inside diameter) tube.

4. Connect a downstream bleed line from the "S"

port of the upstream working Type PRX pilot to the

intermediate pressure portion of piping, using 8/10

(inside diameter) tube.

STARTUP AND ADJUSTMENT

Pre-startup Considerations

Each regulator is factory-set for the outlet pressure specied

on the order. If no setting was specied, outlet pressure

was factory-set at the mid-range of the pilot control spring.

Before beginning the start-up procedure in this section make

sure the following conditions are in effect:

• Block valves isolate the regulator

• Vent vales are closed

• A bypass, if any, is in operation.

In all cases, check the control spring setting to make sure it

is correct for the application.

CAUTION

Be sure to slowly introduce pressure into the

system to prevent downstream overpressure

due to potential rapid pressure increase.

Pressure gauges should always be used to

monitor downstream pressure during startup.

Procedures used in putting this regulator

into operation must be planned accordingly

if the downstream system is pressurized by

another regulator or by a manual bypass.

TYPE EZH OS2 SLAM-SHUT VERSION

In the case of opening the mechanism box lid:

After arming, never leave the key on the stem

2. Never put your ngers in or near the

reset mechanism area

Note

When using a Type SA/2 pilot supply lter

regulator, the differential pressure across the

regulator must be at least 3 bar for optimum

regulator performance. The Type SA/2 can

be removed if differential pressure across the

regulator is less than 3 bar and inlet pressure

stays at or below 13.8 bar.

Startup

Type EZH Startup:

1. Make sure all block valves, vent valves, and control line

valve(s) are closed.

2. Back out the pilot adjusting screw(s).

3. Slowly open the valves in the following order:

- Inlet block valves.

- Pilot supply and control line valve(s), if used.

4. Crack open the outlet block valve or bypass valve to

allow minimum ow.

5. After adjusting the Type PRX pilot(s) to the desired

pressure setting(s), slowly open the downstream block

valve wide open.

6. Close the bypass valve, if used.

Type EZHSO Startup:

1. Make sure all block valves, except valve R4, vent

valves, and control line valve(s) are closed.

2. Back out the pilot adjusting screw(s).

3. Introduce upstream pressure by slowly opening inlet valve.

4. Slowly open valve R2.

5. Open valve R3.

6. Close valve R4, the regulator Type EZHSO close.

7. Open valve R4.

8. Close valve R3.

9. Slowly open downstream valve, making sure that

there is a constant sufcient pressure drop across the

regulator. If downstream pressure climbs too close to

upstream pressure, the regulator will again fully open.

In this case, start-up procedure needs to be repeated.

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Types EZH and EZHSO 1
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Emerson EZH and EZHSO Series Pressure Reducing Regulators Instrukcja Obsługi Strona 15

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