Emerson CS800 Manuel d'instructions télécharger pdf (Page 12)

CS800 Series

If the regulator is exposed to an

overpressure condition, it should be

inspected for any damage that may have

occurred. Regulator operation below these

limits does not preclude the possibility of

damage from external sources or from debris

in the pipeline.

General Installation Instructions

Before installing the regulator,

• Check for damage, which might have occurred

during shipment.

• Check for and remove any dirt or foreign material,

which may have accumulated in the regulator body.

• Blow out any debris, dirt or copper sulfate in copper

tubing and the pipeline.

• Apply pipe compound to the external threads of the pipe

before installing the regulator.

Note

Applying pipe compound to internal threads

can result in excess pipe compound

collecting in the body of the regulator and

potentially clog registration ports, affect

lockup or downstream equipment.

• Make sure gas ow through the regulator is in the same

direction as the arrow on the body. “Inlet” and “Outlet”

connections are clearly marked.

• When designing a pressure reducing station using

a CS800 Series regulator, make an analysis if it is

necessary to take into account the effects of wind,

snow and temperature to avoid unnecessary load and

movement to the anges of the equipment.

• If needed, a support may be used under the piping and

regulator/slam-shut body to avoid excessive pressure

force on the regulator/slam shut.

Note

For Types CS805, CS825, CS806 and CS826

equipped with the white-colored disk, ensure

that the open end of disk is oriented toward

the downstream as indicated in Figure 7. If

the body direction relative to the actuator is

changed during installation, the orientation

of the white disk must also be removed,

turned and reinstalled to ensure the open

end faces downstream.

Installation Location

• The installed regulator should be adequately protected from

vehicular trafc and damage from other external sources.

• Install the regulator with the vent pointed vertically

down, see Figure 8. If the vent cannot be installed in

a vertically down position, the regulator must be installed

under a separate protective cover. Installing the regulator

with the vent down allows condensation to drain, minimizes

the entry of water or other debris from entering the vent and

minimizes vent blockage from freezing precipitation.

• Do not install the regulator in a location where there

can be excessive water accumulation or ice formation,

such as directly beneath a downspout, gutter or roof

line of building. Even a protective hood may not provide

adequate protection in these instances.

• Install the regulator so that any gas discharge through

the vent or vent assembly is over 3 ft / 0.91 m away from

any building opening.

Regulators Subjected to Heavy

Snow Conditions

Some installations, such as in areas with heavy snowfall,

may require a hood or enclosure to protect the regulator from

snow load and vent freeze over.

Downstream Control Line Installation

A CS800 Series regulator with an EN or ET in the type number

has a blocked throat, an O-ring stem seal and a 3/4 NPT control

line tapping in the lower diaphragm casing. A regulator with

a downstream control line is used for monitoring installations

or other applications where there is other equipment installed

between the regulator and the pressure control point.

For types with an EN or ET in the type number, connect

downstream control line tubing to the lower casing and run

the tubing a distance of approximately 6 times the outlet

piping diameter as shown in Figures 9, 10 and 11. For best

results, the outer diameter of the control line tubing should

be 3/8 in. / 9.5 mm or larger.

Downstream Control Line Installation with

Integral True-Monitor™

Refer to Figure 10. When installing the Types CS803ET and

CS803EN regulators, connect downstream control line tubing

to the lower casing of the Primary Regulator and run the tubing

a distance of approximately 6 times the outlet piping diameter

downstream of the regulator outlet. Connect a second, separate

downstream control line tubing to the lower casing of the Integral

Monitor and run the tubing a distance of approximately 6 times

the outlet piping diameter downstream of the Integral Monitor

outlet. For best results, the outer diameter of the control line

tubing for both the Primary Regulator and the Integral Monitor

should be 3/8 in. / 9.5 mm or larger.

Installation with External Overpressure Protection

If the regulator is used in conjunction with a Type 289H relief

valve, it should be installed as shown in Figure 8. The outside

end of the vent line should be protected with a rainproof

assembly. The Type 289H should be set 10 in. w.c. / 25 mbar

higher than the outlet pressure setting of the regulator, up to

30 in. w.c. / 75 mbar outlet pressure. For pressure greater

than this, set the Type 289H 0.75 psi / 52 mbar higher

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Emerson CS800 Manuel d'instructions Page 12

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