Emerson Fisher easy-e EWT-C, Fisher easy-e EZ-C Instruction Manual

Instruction Manual

D102175X012

EZ-C, ET-C, and EWT-C Valves

Fisherr EZ-C, ET-C, and EWT-C Cryogenic
Sliding-Stem Control Valves

October 2014

Contents

Introduction 1.................................

Scope of Manual 1.............................

Description 1.................................

Specifications 2...............................

Educational Services 3.........................

Installation 3..................................

Maintenance 5.................................

Packing Maintenance 7.........................

Replacing Packing 7........................

Trim Maintenance 10..........................

EZ-C Trim Disassembly 10...................

EZ-C Trim Assembly 11.....................

ET-C and EWT-C Trim Disassembly 12.........

ET-C and EWT-C Valve Plug Maintenance 13....

ET-C and EWT-C Trim Assembly 14...........

Coining Soft Metal-to-Metal Seats 14.........

Parts Ordering 14...............................

Parts Kits 15...................................

Parts List 18...................................

Bonnet Parts 18...............................

EZ-C Valve Body Parts 18.......................

ET-C and EWT-C Valve Body Parts 22..............

Introduction

Figure 1. Typical Fisher Cryogenic Valve with
Extension Bonnet and 585C Series Actuator

W6370

Scope of Manual

This instruction manual includes installation, maintenance, and parts information for Fisher EZ-C, ET-C and EWT-C
valves (see figure 1). Refer to separate manuals for instructions covering the actuator and accessories.

Do not install, operate, or maintain EZ-C, ET-C or EWT-C valves 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 Process Management sales office
before proceeding.

Description

EZ-C: globe-style, single-port, unbalanced valves with integral end connections, post guiding, metal-to-metal seating,
and quick-change trim. They feature stainless steel construction materials and fabricated extension bonnets.

ET-C and EWT-C: metal-to-metal seated globe-style, single-port, cage-guided, pressure-balanced valves featuring
stainless steel construction materials and fabricated extension bonnets.

www.Fisher.com

EZ-C, ET-C, and EWT-C Valves

October 2014

Table 1. Specifications

Instruction Manual

D102175X012

Valve Sizes

EZ-C: NPS J 1, J 1-1/2, J 2, J 3, and J 4
ET-C: NPS J 3, J 4, J 6, and J 8
EWT-C: NPS J 6X4

(1)

, J 8X4, J 8X6, J 12X6, and

J 10X8

End Connection Styles

(2)

CL150, 300, and 600 raised-face flanges per ASME

Material Temperature Capability

EZ-C: -198 to 149_C(-325to300_F)

ET-C and EWT-C:

-198 to 66_C(-325to150_F)

Maximum Allowable Actuator Thrust

See table 2

(2)

B16.5

Flow Characteristics

Maximum Inlet Pressure

(2)

CL150 and 300–Valves are consistent with

EZ-C: Equal percentage, linear, and
quick opening
ET-C and EWT-C: Equal percentage and linear

pressure-temperature ratings per ASME B16.34

CL600–Valves with B8M Class 2 bolting are
consistent with CL600 pressure-temperature ratings
per ASME B16.34 except as shown below:

EZ-C VALVES

Valve Size, NPS

1
2
3

Maximum InletPressure
Bar Psig

77
83
94

1110
1200
1370

Flow Directions

EZ-C:Up through the seat ring only

ET-C and EWT-C

:

Normally down

Approximate Weights

EZ-C:

NPS 1: 11 kg (33 lb)

(4)

NPS 1-1/2: 23 kg (48 lb)

ET-C AND EWT-C VALVES

Valve Size, NPS

3 94 1370

6, 8 x 6, 12 x 6 75 1085

8, 10 x 8 96 1390

Maximum InletPressure
Bar Psig

NPS 2: 41 kg (90 lb)

NPS 3: 60 kg (130 lb)

NPS 4: 95 kg (210 lb)

ET-C:

NPS 3: 51 kg (135 lb)

CL600–Valves with optional S20910 (XM-19) bolting
are consistent with CL600 pressure-temperature
ratings per ASME B16.34

NPS 4: 95 kg (210 lb)

NPS 6: 211kg(465lb)

NPS 8: 372kg(820lb)

Shutoff Classifications per ANSI/FCI 70-2
and IEC 60534-4

EWT-C

NPS 6X4: 200 kg (440 lb)

VALVE SHUTOFF CLASS

EZ-C

ET-C and EWT-C

1. Valvesize number is end connectionsize by normal trim size.For example, an NPS 6X4 valve has NPS 6 end connections with NPS 4 trim.

2. Do not exceed the pressure/temperature limits in this manualand any applicable code limitation.

3. ClassV Air Test is optional. Test will be 50psid air. Class V shutoffcannot be performed with water. The residual trappedmoisture from testing with water can cause valve and trim damage
from ice crystals formed at below freezingservice temperatures.

4. Down is in through the cage and out the seal ring. (see figure 9).

Class IV–Standard
Class VI–Optional
Class IV–Standard

Class V Air Test

–Optional

(3)

NPS 8X4: 277 kg (610 lb)

NPS 8X6: 318 kg (700 lb)

NPS 12X6: 730 kg (1610 lb)

NPS 10X8: 753 kg (1660 lb)

2

Instruction Manual

D102175X012

EZ-C, ET-C, and EWT-C Valves

Table 2. Maximum Allowable Actuator Thrust for Standard Style 3 Bonnet Extension Length

MAXIMUM ALLOWABLE STEM LOAD

FOR S20910 (XM-19) STEM MATERIAL

VALVE SIZE, NPS

1

1-1/2

2

3

4, 6X4, 8X4

6, 8X6, 12X6

8, 10X8

STEM DIAMETER

mm Inches N Lb

9.5 3/8 5382 1210

12.7 1/2 13166 2960

9.5 3/8 5338 1200

12.7 1/2 13166 2960

12.7 1/2 14367 3230

19.1 3/4 44169 9930

12.7 1/2 15301 3440

19.1 3/4 45459 10220

12.7 1/2 16458 3700

19.1 3/4 46971 10560

19.1 3/4 36385 8180

25.4 1 81487 18320

19.1 3/4 41366 9300

25.4 1 87003 19560

Educational Services

October 2014

For information on available courses for Fisher EZ-C, ET-C, and EWT-C valves, as well as a variety of other products,
contact:

Emerson Process Management
Educational Services - Registration
Phone: [phone] or 1-800-338-8158
E-mail: [e-mail]
http://www.emersonprocess.com/education

Installation

Isolatethecontrolvalvefromthelinepressure,releasepressure from both sides of the valve body, and drain the
process media from both sides of the valve. Remove actuator supply pressure, and use lockout 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.

3

EZ-C, ET-C, and EWT-C Valves

October 2014

Instruction Manual

D102175X012

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

orientedsothatpipelineflowisinthesamedirectionasthearrowonthesideofthevalve.

3. Gas Service: The normal method of mounting for gas service is with the actuator vertical above the valve body.

However, the control valve assembly may be installed in any orientation unless limited by seismic criteria. Other
positions may result in uneven valve plug and cage wear that could result in improper operation. For mounting
assistance, consult your Emerson Process Management sales office.

CAUTION

To avoid possible damage to the packing, do not allow the installed actuator angle to be so flat as to allow liquid inside the
bonnet to come in contact with the packing.

Also, if insulation is applied, do not let the insulation run up the extension bonnet. This could cause the packing to freeze
and be damaged.

Liquid Service: The preferred method of mounting for liquid service is with the actuator vertical above the valve body.
This will allow a vapor layer to form between the liquid and the packing. If there are piping constraints, the actuator
can be angled slightly from vertical. However, in no case should the angle be so flat as to allow liquid inside the bonnet
to come in contact with the packing. For mounting assistance, consult your Emerson Process Management sales
office.

4. If insulation is applied, make sure it is applied only to the body/bonnet joint. Do not let the insulation run up the

extension bonnet.

5. Use accepted piping and welding practices when installing the valve in the line. For flanged valve bodies, use a

suitable gasket between the valve body and pipeline flanges.

6. If the actuator and valve are shipped separately, refer to the actuator mounting procedure in the appropriate

actuator instruction manual.

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.

Valves with ENVIRO-SEALt live-loaded packing will not require this initial readjustment. See the Fisher instruction
manual titled ENVIRO-SEAL Packing System for Sliding-Stem Valves for packing instructions. If you wish to convert
your present packing arrangement to ENVIRO-SEAL packing, refer to the retrofit kits listed in the parts kit sub-section
near the end of this manual.

4

Instruction Manual

D102175X012

EZ-C, ET-C, and EWT-C Valves

October 2014

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 maintenance
and trim maintenance. All maintenance operations may be performed with the valve in the line.

WARNING

Avoid personal injury or property damage from sudden release of process pressure. Before performing any maintenance
operations:

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.

CAUTION

Follow instructions carefully to avoid damaging the product surfaces, which could result in damage to the product.

Note

Whenever a gasket seal is disturbed by removing or shifting parts, a new gasket should be installed upon reassembly. This is
necessary to ensure a good gasket seal since the used gasket may not seal properly.

Figure 2. Single PTFE V-Ring Packing Arrangement

UPPER WIPER
(KEY 12)

PACKING
FOLLOWER
(KEY 13)

WASHER
(KEY 10)

SPRING
(KEY 8)

PACKING BOX
RING (KEY 11)

12A7837-A
A6745

NOTE:

1

PACKING SET (KEY6) CONTAINS A FEMALE ADAPTER, V-RING PACKINGRINGS, MALEADAPTER, ANDLOWER WIPERRINGS.

FEMALE
ADAPTER

PACKING RING

MALE
ADAPTER

LOWER WIPER

1

1

1

1

5

EZ-C, ET-C, and EWT-C Valves

October 2014

Figure 3. Double PTFE V-Ring Packing Arrangements

UPPER WIPER
(KEY 12)

PACKING
FOLLOWER (KEY 13)

FEMALE
ADAPTER

PACKING RING

MALE
ADAPTER

LANTERN RING
(KEY 8)

PACKING BOX
RING (KEY 11)

9.5 mm

(3/8 INCH)

STEM

NOTE:

PACKING SET(KEY 6) CONTAINS A FEMALE ADAPTER, V-RING PACKING RINGS, MALE ADAPTER, AND LOWER WIPER RINGS.

1

A6746

12.7 mm

(1/2 INCH)

STEM

19.1, 25.4, OR 31.8 mm
(3/4, 1, OR 1-1/4 INCH)

STEM

LOWER WIPER

1

1

1

1

Instruction Manual

D102175X012

Figure 4. Graphite Ribbon/Filament Packing Arrangements

PACKING
FOLLOWER (KEY13)

GRAPHITE RIBBON
PACKING RING
(KEY 7)

GRAPHITE FILAMENT
PACKING RING
(KEY 7)

LANTERN RING
(KEY 8)

PACKING BOX
RING (KEY 11)

9.5 mm

(3/8 INCH)

STEM

NOTE:

0.102 mm (0.004 INCH) THICKSACRIFICIAL ZINC WASHERS: USE ONLY ONE BELOW EACH GRAPHITERIBBON RING.

1

A6747

12.7 mm

(1/2 INCH)

STEM

19.1, 25.4, OR 31.8 mm
(3/4,1,OR1-1/4INCH)

STEM

6

Instruction Manual

D102175X012

EZ-C, ET-C, and EWT-C Valves

October 2014

Packing Maintenance

This section covers PTFE V-ring, double PTFE, and graphite packing used in extension bonnets (figures 2, 3, and 4).

Note

If the valve has ENVIRO-SEAL live-loaded packing installed, refer to the instruction manual ENVIRO-SEAL Packing System for Sliding
Stem Valves for packing instructions. Figure 6 shows typical ENVIRO-SEAL arrangements.

Standard packing key numbers are shown in figures 2, 3, and 4. ENVIRO-SEAL packing key numbers are shown in
figure 6. Bonnet key number locations are shown in figure 7, and valve key numbers are shown in figures 8 and 9.

For spring-loaded single PTFE V-ring packing, the spring (key 8) maintains a sealing force on the packing. If leakage is
noted around the packing follower (key 13), 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), until the shoulder is against
the bonnet. If leakage cannot be stopped in this manner, proceed with replacing packing procedures.

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 critical for making a good packing seal. 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.

Replacing Packing

WARNING

Refer to the WARNING at the beginning of the Maintenance section in this instruction manual.

Key numbers and sequence of assembly of packing parts are shown in figures 2, 3, and 4. Bonnet key number locations
are shown in figure 7, and valve key number locations are shown in figures 8 and 9, unless otherwise noted.

1. Isolatethecontrolvalvefromthelinepressure,releasepressure from both sides of the valve body, and drain the
process media from both sides of the valve. If using a power actuator, also shut off all pressure lines to the power
actuator,andreleaseallpressurefromtheactuator.Uselock-outprocedurestobesurethattheabovemeasures
stay in effect while you work on the equipment. Observe the Warnings at the start of the Maintenance section.

2. Disconnect the operating lines from the actuator and any leak-off piping from the bonnet. Disconnect the stem
connector and remove the actuator from the valve by unscrewing the yoke locknut (key 15) or hex nuts (key 26, not
shown).

3. Loosen the packing flange nuts (key 5) so that the packing is not tight on the valve stem. Remove any travel
indicator parts and stem locknuts from the valve stem threads.

WARNING

D To avoid personalinjury or property damage caused by uncontrolled movement of the bonnet, loosen the bonnet by

following the instructions in the next steps.

7

EZ-C, ET-C, and EWT-C Valves

October 2014

Instruction Manual

D102175X012

Do not remove a stuck bonnet by pulling on it with equipment that can stretch or store energy in any other manner. The
sudden release of stored energy can cause uncontrolled movement of the bonnet.

D To avoid personalinjury or damage to the seating surface caused by the valve plug and stem assembly dropping from

the bonnet after being lifted out of the valve body, observe the following instructions.

4. When lifting an EZ-C bonnet, temporarily install a valve stem locknut on the valve stem. This locknut will prevent
the valve plug and stem assembly from dropping out of the bonnet.

5. When lifting an ET-CorEWT-Cbonnet,be sure the plug and stem assembly and cage remain in the valve body.

WARNING

To avoid possible personal injury, review your process shutdown procedures to be sure process pressure is not applied to
the valve for the following procedure.

6. Hex nuts (key 16) attach the bonnet to the valve body (key 1). Loosen these nuts or cap screws approximately 3 mm
(1/8 inch). Then, loosen the body-to-bonnet joint by either rocking the bonnet or prying between the bonnet and
valve body. Work with a prying tool around the bonnet until the bonnet loosens.

Table 3. Recommended Torque for Packing Flange Nuts

VALVE STEM DIAMETER

mm Inch NSm Lbf-in NSm Lbf-in NSm Lbf-in NSm Lbf-in

9.5 3/8

12.7 1/2

19.1 3/4

25.4 1

31.8 1-1/4

PRESSURE

RATING

150 3 27 5 40 1 13 2 19
300 4 36 6 53 2 17 3 26
600 6 49 8 73 3 23 4 35
150 5 44 8 66 2 21 4 31
300 7 59 10 88 3 28 5 42
600 9 81 14 122 4 39 7 58
150 11 99 17 149 5 47 8 70
300 15 133 23 199 7 64 11 95
600 21 182 31 274 10 87 15 131
150 19 169 29 254 9 80 14 120
300 26 226 38 339 12 108 18 162
600 35 310 53 466 17 149 25 223
150 27 238 40 357 13 113 19 169
300 36 318 54 477 17 152 26 228
600 49 437 74 655 24 209 36 314

Minimum Torque Maximum Torque Minimum Torque Maximum Torque

GRAPHITE PACKING PTFE PACKING

Table 4. Body-to-Bonnet Torque Guidelines

BOLT TORQUES

VALVE SIZE, NPS

NSm Lbf-ft

1 122 90

1-1/2 or 2 91 67

3 163 120

4, 6X4, or 8X4 258 190

6, 8X6, or 12X6 522 385

8or10X8 712 525

1. Determinedfrom laboratory testing.

2. For bolting materials not listed in table 4, contactyour Emerson Process Management salesoffice for torque information.

3. SA193-B8M s train hardened.

4. Hotrolled.

Bolt Material

(3)

B8M

or S20910 (XM-19)

(1)

(2)

(4)

8