Emerson Type HSR Pressure Regulators Manual de instrucciones descargar pdf (Pagina 6)

Type HSR

Type HSR regulators provide internal relief that limits the

total outlet pressure build-up over setpoint. This internal relief

may be adequate for the application, if not, provide additional

pressure relief or a pressure-limiting device downstream.

Regulators should be inspected for damage after any

overpressure condition.

Startup

WARNING

To avoid personal injury or property damage

due to explosion or damage to regulator or

downstream components during startup,

release downstream pressure to prevent an

overpressure condition on the diaphragm of

the regulator.

In order to avoid an overpressure condition

and possible equipment damage, pressure

gauges should always be used to monitor

pressures during startup.

1. Check to see that all appliances are turned off.

2. Slowly open the upstream shutoff valve.

3. Slowly open the downstream shutoff valve.

4. Check all connections for leaks.

5. Make nal control spring adjustments according to the

adjustment procedures.

6. Light the appliance pilots.

Adjustment

To increase the outlet pressure setting of the regulator,

the adjusting screw (key 26, Figure 6) must be turned

clockwise. This requires removal of the closing cap (key 8).

To reduce the outlet pressure setting, turn the adjusting

screw counterclockwise. A pressure gauge should always be

used to monitor downstream pressure while adjustments are

being made. Do not adjust the spring to produce an outlet

pressure setting above the limit identied on the information

label. If the required pressure setting is not within the range

of the spring being used, substitute with the correct spring,

see Table 2. When changing the spring, also change the

range identied on the information label to indicate the

actual pressure range of the spring in use. After the spring

adjustment has been completed, replace the closing cap.

Shutdown

WARNING

To avoid personal injury or property

damage due to explosion or damage to

regulator or downstream components

during shutdown, release downstream

pressure to prevent an overpressure

condition on the regulator diaphragm.

Installation arrangements may vary, but in any installation it is

important that the valves be opened or closed slowly. These

steps apply to the typical installation.

1. Slowly close the downstream shutoff valve.

2. Slowly close the upstream shutoff valve.

3. Open vent valves downstream of the regulator.

4. Open vent valves upstream of the regulator.

Maintenance

WARNING

Avoid personal injury or damage to

property from sudden release of pressure

or uncontrolled gas or other process uid.

Before starting to disassemble, isolate the

regulator from all pressure and cautiously

release trapped pressure from the regulator.

Use gauges to monitor inlet, loading and outlet

pressures while releasing these pressures.

These procedures are for gaining access to the diaphragm,

valve disk and orice. All pressure must be released from the

diaphragm actuator assembly before the following steps can

be performed.

While using the following procedures, refer to Figure 6 for

key number locations.

Diaphragm Replacement

1. Remove the closing cap (key 8) and adjusting screw

(key 26).

2. Remove the spring case machine screws (key 9) out of

the spring case (key 1) and remove the spring case and

control spring (key 25).

3. Lift the diaphragm (key 11) slightly and slide it away

from the lever (key 4), so that the pusher post (key 12)

releases the lever.

1 2 3 4 5 6 7 8

Type HSR 1

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Emerson Type HSR Pressure Regulators Manual de instrucciones Pagina 6

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