EZ-C, ET-C, and EWT-C Valves
Instruction Manual
Form 5376
August 2006
3
Table 2.
Maximum Allowable Actuator Thrust for Standard Style 3 Bonnet Extension Length
VALVE SIZE, INCHES
STEM DIAMETER
MAXIMUM ALLOWABLE STEM LOAD
FOR S20910 (XM-19) STEM MATERIAL
mm
Inches
N
Lb
1
9.5
3/8
5382
1210
12.7
1/2
13,166
2960
1.5
9.5
3/8
5338
1200
12.7
1/2
13,166
2960
2
12.7
1/2
14,367
3230
19.1
3/4
44,169
9930
3
12.7
1/2
15,301
3440
19.1
3/4
45,459
10,220
4, 6X4, 8X4
12.7
1/2
16,458
3700
19.1
3/4
46,971
10,560
6, 8X6, 12X6
19.1
3/4
36,385
8180
25.4
1
81,487
18,320
8, 10X8
19.1
3/4
41,366
9300
25.4
1
87,003
19,560
Installation
Isolate the control valve from the line pressure,
release pressure from both sides of the valve body,
and drain the process media from both sides of the
valve. Remove actuator supply pressure, and use
lock-out procedures to be sure that the above
measures stay in effect while you work on the
equipment. Refer to the
Warnings
at the beginning
of the Maintenance section for additional
information.
WARNING
Always wear protective gloves,
clothing, and eyewear when
performing any installation operations
to avoid personal injury.
Personal injury or equipment damage
caused by sudden release of pressure
may result if the valve assembly is
installed where service conditions
could exceed the limits given in table 1
or on the appropriate nameplates. To
avoid such injury or damage, provide a
relief valve for over-pressure
protection as required by government
or accepted industry codes and good
engineering practices.
Check with your process or safety
engineer for any additional measures
that must be taken to protect against
process media.
If installing into an existing
application, also refer to the WARNING
at the beginning of the Maintenance
section in this instruction manual.
CAUTION
When ordered, the valve configuration
and construction materials were
selected to meet particular pressure,
temperature, pressure drop, and
controlled fluid conditions. Since
some valve body/trim material
combinations are limited in their
pressure drop and temperature
ranges, do not apply any other
conditions to the valve without first
contacting your Emerson Process
Management sales office.
Before installing the valve, inspect the
valve and pipelines for any damage
and any foreign material which may
cause product damage.
1. Before installing the valve, inspect the valve and
associated equipment for any damage and any
foreign material.
2. Make certain the valve body interior is clean, that
pipelines are free of foreign material, and that the
valve is oriented so that pipeline flow is in the same
direction as the arrow on the side of the valve.
3.
Gas Service:
The normal method of mounting for
gas service is with the actuator vertical above the