Emerson EZH and EZHSO Series Pressure Reducing Regulators Manual de Instruções descarregar pdf (Página 14)

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Types EZH and EZHSO

Connect the actuator to the impulse plug

keeping a minimum distance of 4 x D to a

straight run of the outlet pipe.

In the version with integrated slam shut

connect the safety manometric box (BMS) to

the outlet pipe keeping a minimum distance

of 4 x D to a straight run of the pipe.

In the case of functioning class B for the

slam shut it is necessary to regularly check

the safety manometric box (BMS) diaphragm.

Connect the reject tab to the outlet pipe.

It is recommended to separate the slam-shut

impulse from that of the actuator. Do not

connect impulses on the lower generator line.

It is recommended to install and isolation

tap and a vent tap. These can be useful for

slam-shut settings and verications.

Check that the pilot impulse is connected

and in the case of an isolating tap (not

recommended) that it is open.

No modification should be made to the

structure of the equipment (drilling,

grinding, soldering...).

It is recommended to install a servicing valve

on the outlet pipeline to facilitate adjustments

and bleeding off to the atmosphere.

In the version with integral slam shut, verify

that the safety manometric box (BMS)

and spring correspond to the appropriate

operating conditions on the outlet side of

the regulator.

The equipment should not receive any type

of shock, especially the release relay.

The user should verify or carry out a

protection adapted to the environment.

For DN 25 to 80, use long screws or threaded

stems when opening the actuator (warning

compressed spring).

The action of re, seismic and lightening

are not taken into consideration in standard

regulators. If required, a special product

selection and/or specic calculations may be

supplied according to specic requirements.

A regulator may vent some gas to the

atmosphere. In hazardous or ammable gas

service, vented gas may accumulate, causing

personal injury, death, or property damage

due to bursting of pressure-retaining parts.

Vent a regulator in hazardous gas service to

a remote, safe location away from air intakes

or any hazardous location. The vent line or

stack opening must be protected against

condensation or clogging.

All Installations (Single Regulator or

Monitor Systems)

A Type EZH or EZHSO regulator bleeds no gas to

atmosphere during normal operation, thus making the

regulator suitable for installation in pits and other enclosed

locations without elaborate venting systems.

This regulator can also be installed in pits subject to

ooding by venting the pilot spring case above the expected

ood level so that the pilot setting can be referenced to

atmospheric pressure.

1. Install the regulator so that the ow arrow on the main

valve matches the ow direction of process uid through

the regulator.

2. Apply pipe compound to the male pipeline threads

before installing a regulator with threaded NPT end

connections. Use gaskets between pipeline and

regulator anges when installing a regulator with

anged end connections. When installing buttweld end

connections, remove trim before welding and make

sure to use approved welding practices. Use approved

piping procedures when installing the regulator.

3. Type PRX pilots have a 1/4-inch NPT vent connection

in the spring case. To remotely vent gas from the

spring case, remove the screened vent, and connect

1/4-inch piping or tubing to the spring case connection.

The piping or tubing should vent to a safe location,

have as few elbows as possible, and have a screened

vent on it’s exhaust. Install the regulator and any

remote vent piping or tubing so that the vent is

protected from condensation, freezing, or substances

that my clog it.

CAUTION

To avoid freeze up due to pressure drop

and moisture in the gas, use anti-freeze

practices, such as heating the supply

gas or adding a de-icing agent to the

supply gas.

4. Connect the actuator to the downstream sense

line on a straight run of outlet pipe 8/10 (inside

diameter). Connect the other end of that impulse to

the Type PRX port.

5. Connect the PRX pilot port to the outlet pipeline at

a minimum distance of 4 x D from the regulator’s

outlet ange.

6. For Type EZHSO installation, a vent valve downstream

of the regulator is needed. It should be installed

directly in the Type PRX pilot bleed line connection

(line from port "S" to pipe). A full bore NPS 1/4

ball valve for the vent line is preferred to provide

sufcient ow.

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Types EZH and EZHSO 1
LABELLING 5

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Emerson EZH and EZHSO Series Pressure Reducing Regulators Manual de Instruções Página 14

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