Emerson T205B Manual de instrucciones descargar pdf (Pagina 5)

Type T205B

Figure 4. Balanced Trim Assembly

WARNING

A regulator may vent some gas to

the atmosphere. In hazardous or

 ammable gas service, vented gas may

accumulate and cause personal injury,

death or property damage due to  re or

explosion. Vent a regulator in hazardous

gas service to a remote, safe location

away from air intakes or any hazardous

area. The vent line or stack opening

must be protected against condensation

or clogging.

3. To keep the vent assembly (key 26, Figure 6) from

being plugged or the spring case (key 3) from

collecting moisture, corrosive chemicals or other

foreign material, point the vent down or otherwise

protect it. The diaphragm casing (key 4) may be

rotated in order to obtain desired positioning.

4. To remotely vent the regulator, remove the vent

(key 26, Figure 6) and install obstruction-free

tubing or piping into the 1/4 NPT vent tapping.

Provide protection on a remote vent by installing

a screened vent cap into the remote end of the

vent pipe.

5. The Type T205B requires a downstream control

line. Be sure to install the control line before

putting the regulator into operation. Make the

control line as short and straight as possible

and do not install it in a location where  ow may

be turbulent. Restrictions in the control line can

prevent proper pressure registration. When using

a hand valve, it should be a full  ow valve, such

as a full port ball valve. Install the control line

sloping downward toward the tank to prevent

condensation buildup and avoid low points (or

traps) that could catch liquid. The sensing line

must enter the tank above the liquid level at a

point that senses the vapor space pressure and is

free from turbulence associated with tank nozzles

or vents. The control line pipe should be at least

1/2-inch / 13 mm in diameter and increase 1 pipe

size for every 10 feet / 3.05 m of control line, with

setpoints less than 5-inches w.c. / 12 mbar.

6. An upstream shutoff valve is recommended

to simplify maintenance to the regulator. It is

advisable to install a pressure gauge between the

upstream shutoff valve and the blanketing valve.

BIAS SPRING SEAT (KEY 40)

BIAS SPRING (KEY 39)

GUIDE INSERT (KEY 18)

DISK (KEY 13)

STEM (KEY 14)

INSERT SEAL O-RING (KEY 12)

1 2 3 4 5 6 7 8 9 10 11 12

Type T205B 1

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Emerson T205B Manual de instrucciones Pagina 5

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