Instruction Manual
D100400X012
EWN and EW-1 Valves
July 2017
Fisher
™
EWN Series and EW‐1 Series Valves
Contents
Introduction 1.................................
Scope of Manual 1.............................
Description 1.................................
Specifications 1...............................
Educational Services 3.........................
Installation 3..................................
Maintenance 5.................................
Packing Lubrication 5..........................
Packing Maintenance 6.........................
Trim Removal 10..............................
Lapping Seating Surfaces 11....................
Valve Plug Maintenance 12.....................
Parts Ordering 14...............................
Parts List 14...................................
Figure 1. Fisher EWNT-2 NPS 12 x 8 EWNT‐2 Valve
with Typical Actuator
W3310
Introduction
Scope of Manual
This instruction manual includes installation, maintenance, and parts information for Fisher NPS 8 x 6 and 12 x 8 EWN
Series and EW‐1 Series valves (figure 1). Refer to separate manuals for instructions covering the actuator and
accessories.
Do not install, operate, or maintain an EWN or EW-1 Series valve without being fully trained and qualified in valve,
actuator, and accessory installation, operation, and maintenance. To avoid personal injury or property damage, it is
important to carefully read, understand, and follow all the contents of this manual, including all safety cautions and
warnings. If you have any questions about these instructions, contact your Emerson sales office
Partner before proceeding.
Description
These single‐port globe‐style valves have cage guiding, threaded seat rings, metal‐to‐metal seating, and
push‐down‐to‐close valve plug action. Additional details are given in tables 1 and 2.
Specifications
Typical specifications for these valves are shown in table 1. Some of the specifications for a given valve assembly as it
was shipped from the factory appear on the actuator nameplate if the valve is part of a complete control valve
assembly.
or Local Business
www.Fisher.com
EWN and EW-1 Valves
July 2017
Table 1. Specifications
Instruction Manual
D100400X012
Available Configurations and Valve Body Sizes
See table 2
End Connection Styles
Flanged Ends: Styles per ASME B16.5 are CL300, 600,
J raised‐face or Jring‐type joint
or 900
Buttwelding Ends: Styles per ASME B16.25 are
Schedule
or Schedule
J40 or J80 for all CL300 and 600 valves
J80, J100, or J120 for all CL900
valves
Maximum Inlet Pressures and Temperatures and
Pressure Drops
(1)
Consistent with applicable JCL300, J600, or J900
pressure/temperature ratings per ASME B16.34, but
do not exceed the pressure, temperature, and
pressure drop conditions specified when the valve
was ordered. Also see the Installation section
Shutoff Classifications
See table 3
Flow Characteristics
Standard Cages: J Linear, J quick‐opening, or J
equal percentage
Whisper Trim™ Cages: Linear, except equal
percentage for first 38.1 mm (1.5 inch) of travel with
level D cage for NPS 8 x 6 valve
Flow Directions
EWS‐1 with Standard Cage: Normally up
All Others with Standard Cages: Normally down
Whisper Trim Cages: Always up
Valve Plug Travels
See table 2
Approximate Weights
NPS 8 x 6 CL900 Valve Body
Flanged Ends: 839 kg (1850 lb)
Buttwelding Ends: 703 kg (1550 lb)
NPS 12 x 8 Valve Body
CL300 (Flanged Ends Only): 721 kg (1590 lb)
CL600 Flanged Ends: 930 kg (2050 lb)
CL600 Buttwelding Ends: 726 kg (1600 lb)
CL900 Flanged Ends: 1497 kg (3300 lb)
CL900 Buttwelding Ends: 1293 kg (2850 lb)
Additional Specifications
For specifications such as materials, cage levels, and
stem diameters, refer to the Parts List section.
1. The pressure or temperature limits in this manual and any applicable standard limitations should not be exceeded.
Table 2. Available Configurations
PRESSURE
RATING
CL900 12 x 8
CL900 8 x 6 127 5
CL300, 600, or
900
CL900
CL300, 600, or
900
CL900 12 x 8
VALVE
SIZE,
NPS
12 x 8 203 8
8 x 6 127 5
12 x 8 203 8
12 x 8 203 8 EWNT‐2 with Whisper Trim III cage only
VALVE
PLUG TRAVEL
mm Inches
76 3 EWD‐1 with standard cage
152 6 EWD‐1 with Whisper Trim III cage
76 3 EWS‐1 with standard cage only
76 3 EWT‐1 with standard cage
152 6 EWT‐1 with Whisper Trim III cage
VALVE BODY DESIGN & CAGE STYLE DESCRIPTION
EWND‐1 with Whisper Trim III cage only
EWNT‐1 with Whisper Trim III cage only
Seat ring threaded to valve body;
balanced valve plug with piston ring
Seat ring threaded to valve body;
balanced valve plug with spring‐loaded seat ring
Seat ring threaded to cage;
balanced valve plug;
spring‐loaded seal rings on both seat ring and valve plug
Seat ring threaded to valve body;
unbalanced valve plug
Seat ring threaded to valve body;
balanced valve plug with spring‐loaded seal ring
2
Instruction Manual
D100400X012
EWN and EW-1 Valves
July 2017
Table 3. Shutoff Classification Per ANSI/FCI 70‐2 and IEC 60534‐4
Valve Seating Shutoff Class
EWD-1 or EWND-1 Metal
EWND-1 Metal IV (optional with extra piston rings)
EWS-1 Metal
EWNT-1, EWNT-2, or EWT-1 Metal IV (standard)
II (standard)
III (optional for CL300 or CL600 valves only)
IV (standard)
V (optional, consult your Emerson Automation Solutions sales office)
Educational Services
For information on available courses for the Fisher EWN series and EW-1 series valves, as well as a variety of other
products, contact:
Emerson Automation Solutions
Educational Services - Registration
Phone: 1-641-754-3771 or 1-800-338-8158
E-mail: education@emerson.com
emerson.com/fishervalvetraining
Installation
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 suitable overpressure protection device as required by local, state, and Federal 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. Responsibility for the safety of process media and compatibility of valve
materials with process media rests solely with the purchaser and end‐user. 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 sales office
If hoisting the valve, the use of a nylon sling is recommended to protect the painted surfaces. Also be careful to position the
sling so there will be no damage to the tubing or any accessories.
or Local Business Partner.
1. Before installing the valve, inspect the valve body and associated equipment for any damage and any foreign
material. Make certain that the valve body interior is clean, pipelines are free of foreign material, and the valve is
oriented so that pipeline flow is in the same direction as the arrow on the side of the valve body.
3
EWN and EW-1 Valves
July 2017
Instruction Manual
D100400X012
2. The control valve assembly may be installed in any orientation unless limited by seismic criteria. However, the
normal method is with the actuator vertical above the valve. Other positions may result in uneven valve plug and
cage wear and in improper operation. With some valves, the actuator may also need to be supported when it is not
vertical. For more information, consult your Emerson sales office
or Local Business Partner.
Figure 2. Lubricator and Lubricator/Isolating Valve (Key 14)
LUBRICATOR
10A9421‐A
AJ5428‐D
A0832‐1
Note
If the valve being installed has a Whisper Trim cage with small internal flow passages, consideration should be given to installing
an upstream strainer to prevent the lodging of particles in these passages. This is especially important if the pipeline cannot be
thoroughly cleaned or if the flowing medium is not clean.
LUBRICATOR/ISOLATING VALVE
3. Use accepted piping and welding practices when installing the valve in the line. Internal elastomeric parts may stay
in place during the welding procedure. For flanged valves, use a suitable gasket between the valve body and
pipeline flanges.
CAUTION
Depending on valve body materials used, post weld heat treating may be required. If so, damage to internal elastomeric
and plastic parts, as well as internal metal parts is possible. Shrunk‐fit pieces and threaded connections may also loosen. In
general, if post weld heat treating is to be performed, all trim parts should be removed. Contact your Emerson sales office
or Local Business Partner for additional information.
4. With a leak‐off bonnet construction, remove the 1/4 NPT pipe plugs (keys 14 and 16, figure 6) to hook up the
leak‐off piping. If continuous operation is required during inspection or maintenance, install a three‐valve bypass
around the control valve assembly.
5. If the actuator and valve are shipped separately, refer to the appropriate actuator instruction manual for the
actuator mounting procedure.
4
Instruction Manual
D100400X012
EWN and EW-1 Valves
July 2017
WARNING
Personal injury could result from packing leakage. Valve packing was tightened before shipment; however, the packing
might require some readjustment to meet specific service conditions. Check with your process or safety engineer for any
additional measures that must be taken to protect against process media.
Maintenance
Valve parts are subject to normal wear and must be inspected and replaced as necessary. Inspection and maintenance
frequency depends on the severity of service conditions. This section includes instructions for packing lubrication,
packing replacement, trim maintenance, and lapping seating surfaces. All maintenance operations may be performed
with the valve body in the line.
WARNING
Avoid personal injury or damage to property from sudden release of pressure or uncontrolled process fluid. Before starting
disassembly:
D Do not remove the actuator from the valve while the valve is still pressurized.
D Always wear protective gloves, clothing, and eyewear when performing any maintenance operations to avoid personal
injury.
D Disconnect any operating lines providing air pressure, electric power, or a control signal to the actuator. Be sure the
actuator cannot suddenly open or close the valve.
D Use bypass valves or completely shut off the process to isolate the valve from process pressure. Relieve process pressure
from both sides of the valve. Drain the process media from both sides of the valve.
D Vent the pneumatic actuator loading pressure and relieve any actuator spring precompression.
D Use lock‐out procedures to be sure that the above measures stay in effect while you work on the equipment.
D The valve packing box may contain process fluids that are pressurized, even when the valve has been removed from the
pipeline. Process fluids may spray out under pressure when removing the packing hardware or packing rings, or when
loosening the packing box pipe plug.
D Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
Note
Whenever a gasket seal is disturbed by removing or shifting gasketed parts, a new gasket should be installed upon reassembly.
This is necessary to ensure a good gasket seal.
Packing Lubrication
CAUTION
Do not lubricate graphite packing. Graphite packing is self-lubricated. Additional lubrication may result in slip-stick
movement of the valve.
5
EWN and EW-1 Valves
July 2017
Instruction Manual
D100400X012
WARNING
To avoid personal injury or property damage resulting from fire or explosion, do not lubricate packing used in oxygen
service or in processes with temperatures over 260_C (500_F).
If a lubricator or lubricator/isolating valve (figure 2) is provided for PTFE/composition or other packings that require
lubrication, it will be installed in place of the 1/4 NPT pipe plug (key 14, figure 6). Use a silicon‐base lubricant. Packing
used in oxygen service or in processes with temperatures over 260°C (500°F) should not be lubricated. To operate the
lubricator, turn the cap screw clockwise to force the lubricant into the packing box. The lubricator/isolating valve
operates the same way except the isolating valve must first be opened and then closed after lubrication is completed.
Packing Maintenance
This section covers only PTFE V‐ring and PTFE/composition packing. Refer to a separate manual for graphite
laminate/filament packing if used. Key numbers refer to figure 3 for PTFE V‐ring packing and to figure 4 for
PTFE/composition packing unless otherwise indicated.
For spring‐loaded single PTFE V‐ring packing, the spring (key 8, figure 3) maintains a sealing force on the packing. If
leakage is noted around the packing follower (key 13, figure 3), check to be sure the shoulder on the packing follower
is touching the bonnet. If the shoulder is not touching the bonnet, tighten the packing flange nuts (key 5, figure 6)
until the shoulder is against the bonnet. If leakage cannot be stopped in this manner, proceed to the Replacing
Packing section.
If there is undesirable packing leakage with other than spring‐loaded packing, first try to limit the leakage and
establish a stem seal by tightening the packing flange nuts.
If the packing is relatively new and tight on the stem and if tightening the packing flange nuts does not stop the
leakage, it is possible that the valve stem is worn or nicked so that a seal cannot be made. The surface finish of a new
valve stem is 0.1 micro‐meter (4 micro‐inches) rms. If the leakage comes from the outside diameter of the packing, it
is possible that the leakage is caused by nicks or scratches around the packing box wall. If performing any of the
following procedures, inspect the valve stem and packing box wall for nicks and scratches.
Adding Packing Rings
When using packing with a lantern ring (key 8, figure 3 or 4), it is possible to add packing rings above the lantern ring
as a temporary measure without removing the actuator from the valve body.
1. Remove the packing flange nuts (key 5, figure 6), and lift the packing flange and follower (keys 3 and 13, figure 6)
away from the valve body.
2. It may be possible to dig out the old packing rings on top of the lantern ring, but use care to avoid scratching the
valve stem or packing box wall. Clean all metal parts to remove particles that would prevent the packing from
sealing.
3. If split‐ring packing is being added, spread the rings over the stem, and slide the rings into the packing box.
If solid‐ring packing is being added, remove the stem connector, and slip the rings over the end of the valve stem.
4. Replace the packing flange and packing follower. Tighten the packing flange nuts (key 5, figure 6) only far enough
to stop leakage under operating conditions.
5. If the valve‐actuator stem connection was taken apart, reconnect according to the appropriate actuator instruction
manual.
6. Check for leakage around the packing follower when the valve is being put into service. Retighten the packing
flange nuts as required.
6
Instruction Manual
D100400X012
EWN and EW-1 Valves
July 2017
Figure 3. PTFE V‐Ring Packing Arrangements
UPPER WIPER
(KEY 12)
PACKING
FOLLOWER
(KEY 13)
PACKING
RING
WASHER
(KEY 10)
SPRING
(KEY 8)
PACKING BOX
RING (KEY 11)
FOR 316 OR 17‐4PH SST
METAL PACKING BOX PARTS
B1429
MALE
ADAPTOR
FEMALE
ADAPTOR
PACKING
SET (KEY 6)
LOWER
WIPER
SINGLE ARRANGEMENT
UPPER WIPER
(KEY 12)
PACKING
FOLLOWER
(KEY 13)
MALE
ADAPTOR (KEY 31)
PACKING RING (KEY 7)
FEMALE
ADAPTOR (KEY 32)
LANTERN
RING (KEY 8)
FEMALE
ADAPTOR
PACKING
RING
MALE
ADAPTOR
LOWER
WIPER
FOR ALL OTHER METAL PACKING
BOX PART MATERIALS
UPPER WIPER
(KEY 12)
PACKING
FOLLOWER
(KEY 13)
SPACER (KEY 8)
PACKING BOX
RING (KEY 11)
UPPER WIPER
(KEY 12)
PACKING FOLLOWER
(KEY 13)
FEMALE
ADAPTOR (KEY 32)
PACKING RING
(KEY 7)
MALE
ADAPTOR (KEY 31)
LANTERN
RING (KEY 8)
PACKING BOX
RING (KEY 11)
LOWER WIPER (KEY 30)
12A7839‐A
B1428
ASSEMBLY 1
(POSITIVE
PRESSURES)
ASSEMBLY 2
(VACUUM)
DOUBLE ARRANGEMENT
ASSEMBLY 3
(POSITIVE
PRESSURES &
VACUUM)
PACKING BOX
RING (KEY 11)
LOWER
WIPER
(KEY 30)
12A8178‐A
A2628
LEAK‐OFF ARRANGEMENT FOR 19.1 mm
(3/4 IN.) STEM ONLY
Replacing Packing
WARNING
Observe the warning at the start of the Maintenance section.
1. Disconnect the operating lines from the actuator and any leak‐off piping from the bonnet. Disconnect the stem
connector, and then remove the actuator from the valve by unscrewing the yoke locknut (key 15, figure 6) or the
hex nuts (key 26, figure 6).
7
EWN and EW-1 Valves
July 2017
Figure 4. Detail of PTFE/Composition Packing Arrangements
UPPER WIPER
(KEY 12)
PACKING
FOLLOWER
(KEY 13)
PACKING RING
(KEY 7)
LANTERN
RING (KEY 8)
PACKING BOX
RING (KEY 11)
Instruction Manual
D100400X012
12A8173‐A
A2619
TYPICAL
(DOUBLE)
ARRANGEMENT
12A8180‐A
A1498‐2
19.1 OR 25.4 mm
(3/4 OR 1 IN.)
STEMS
12A8165‐A
31.8 mm
(1‐1/4 IN.)
STEMS
LEAK‐OFF ARRANGEMENT
2. Loosen the packing flange nuts (key 5, figure 6) so that the packing is not tight on the valve stem. Remove any
travel indicator parts and stem locknuts from the valve stem threads.
CAUTION
When lifting the bonnet (key 1, figure 6), be sure that the valve plug and stem assembly remains in the valve and on the
seat. This will avoid damage to the seating surfaces as a result of the assembly dropping from the bonnet after being lifted
part way out. The parts are also easier to handle separately.
3. Unscrew the hex nuts (key 16, figure 7 through 10) that bolt the bonnet and valve body together, and carefully lift
the bonnet off the valve stem.
4. If the valve plug and stem assembly starts to lift with the bonnet, use a brass or lead hammer on the end of the stem
and tap it back down. Set the bonnet on a protective surface to prevent damage to the bonnet gasket surface.
5. Remove the bonnet gasket (key 10, figure 7 through 10), and cover the opening in the valve body to protect the
gasket surface and prevent foreign material from getting into the valve body cavity.
6. Remove the packing flange nuts, packing flange, upper wiper, and packing follower (keys 5, 3, 12, and 13, figure 6).
Carefully push out all the remaining packing parts from the valve body side of the bonnet using a rounded rod or
other tool that will not scratch the packing box wall. Clean the packing box and the metal packing parts.
7. Inspect the valve stem threads and packing box surfaces for any sharp edges that might cut the packing. Scratches
or burrs could cause packing box leakage or damage to the new packing. If the surface condition cannot be
improved by light sanding, replace the damaged parts.
8. Remove the covering protecting the valve body cavity, and install a new bonnet gasket (key 10, figure 7 through
10), making sure the gasket seating surfaces are clean and smooth.
8
Loading...