Fisher EWD, EWS, EWT Product Bulletin

Product Bulletin

EW Valve

D100023X012

51.1:EW

October 2020

Fisher™ EW Series (EWD/EWS/EWT) Sliding-Stem Control Valves through NPS 12x8

Fisher EW Series easy-et valves (figures 1, 2, 3, and 4) feature large internal cavities with expanded end connections and a variety of unbalanced and balanced plug designs. Sizes available from NPS 4x2 12x8. These combinations provide good fluid control in economical, high-capacity valve bodies that keep valve outlet velocities within practical limits.

These valves meet a variety of service requirements, such as power plants where oversized piping is used to limit fluid flow velocity. They also perform well in noise abatement applications; for example, high-pressure gas reducing stations where sonic velocities are often encountered at the outlet of conventional valve bodies.

(1)

through

The Fisher EW product line is available for a wide range of applications, including sulfide and chloride stress-cracking environments common to the oil and gas production industries. To discuss available constructions, contact your Emerson sales office include the applicable codes and standards required for these environments.

and

The easy-e Valve Family

EW Series valves are part of the versatile easy-e family of Fisher industrial control valves. easy-e valves share the following characteristics:

n Multiple trim material choices

n Trim temperature capability with metal seats

standard to 427_C (800_F)

n Interchangeable, restricted-capacity trims and

full-size trims to match variable process flow demands

W2777-1

n Different cage/plug styles that provide particular

flow characteristics for highly-specialized applications. The standard cage comes in three different flow characteristics:

D quick-opening D linear D equal percentage

n Cavitrolt III cages are available to eliminate

cavitation damage and Whisper Trimt III cages are available to help attenuate aerodynamic noise.

n 316 stainless steel packing box parts are standard

(including packing flange, studs, and nuts)

The temperature limits of EWT valves can be extended above 232_C (450_F) by using PEEK

www.Fisher.com

Product Bulletin

51.1:EW October 2020

EW Valve

D100023X012

(PolyEtherEtherKetone) anti-extrusion rings in combination with a spring-loaded PTFE seal. The PEEK anti-extrusion rings expand to close off the clearance gap between the plug and the cage where the PTFE seal may extrude at high temperatures and pressures. The temperature limits are extended to 316_C (600_F) for non-oxidizing service and to 260_C (500_F) for oxidizing service.

Note

Refer to Fisher Bulletin 51.1:EWN, EWN Series valves with Whisper Trim III cages (D100024X012 information.

Note

Refer to Fisher Bulletin 80.3:010, WhisperFlot Aerodynamic Noise Attenuation Trim (D102362X012 further information.

) for further

) for

Features

n Compliance with the Clean Air Act— ENVIRO-SEAL™

packing systems provide an improved stem seal to help prevent the loss of valuable or hazardous process fluid. The ENVIRO-SEAL packing systems feature PTFE or Graphite ULF packing with live-loading for reduced packing maintenance.

n Piping Economy—Expanded end connections of EW

Series valve bodies may reduce the need for line swages while accommodating oversized piping arrangements used to limit fluid flow velocities.

n Temperature Compensation—On designs with the

seat ring threaded into the valve body (figure 4), the hung cage feature helps reduce gasketing problems caused by thermal expansion and contraction of long parts, such as the cage assembly.

n Standard Trim Parts across the easy-e product

line—Included are FGM gaskets, packing flange,

studs, and nuts.

n High-Temperature, Class IV or Class V

Shutoff—Optional multiple piston rings (figure 14)

for EWD and EWD-1 valve bodies permit Class IV shutoff up to 593_C (1100_F). Use of C-seal trim for EWD (see figure 5) permits Class V shutoff up to 593_C (1100_F).

n Increased Pressure/Temperature Ratings—NPS 12x8

CL900 EW Series valve bodies with buttwelding end connections are capable of increased ASME ratings called Intermediate Standard Ratings. The extra strength of the valve body allows these valves to be used where pressures and temperatures exceed Standard Class ratings in ASME B16.34.

See Bulletin 59.1:027, Increased Pressure/ Temperature Ratings for EH and EW Series Steel Valves (D100076X012

) for further information.

n Noise Attenuation—In an EW Series valve, noise

produced by high flow rates and large pressure drops can be reduced by up to 18 dbA with a Whisper Trim I cage, by up to 30 dbA with a Whisper Trim III cage, and by up to 40 dbA with a WhisperFlo cage.

Table of Contents

Features 2.....................................

Specifications 3................................

C-seal Trim Description 6........................

ENVIRO-SEAL and HIGH-SEAL Packing Systems 6.....

Available Configurations 10......................

n Sour Service Capability— Unless otherwise noted,

references are to NACE MR0175-2002. Optional materials are available to meet NACE MR0103 and NACE MR0175 / ISO 15156. Material requirements under these standards vary by edition and year of issue; the specific standard must be specified.

Material Selection Guidelines 10..................

ANSI/FCI Class VI Shutoff Capabilities 12............

Fisher TSO (Tight Shutoff) Trim Capabilities 13......

Installation 13.................................

Dimensions 33.................................

EW Valve

D100023X012

Specifications

Product Bulletin

51.1:EW

October 2020

Valve Body Configurations

See Available Configurations section

Valve Body Sizes

See table 2

End Connection Styles

Flanged: ring-type joint flanges per ASME B16.5,

J CL150, 300, 600, and 900 raised-face or

J raised-face

per EN 1092-1/B Buttwelding: Styles per ASME B16.25 schedules that are consistent with ASME B16.34 are Schedule or

J 80 for all CL300 and 600 valves, Schedule J 80 J XXS for NPS 8x6 CL900 valves, or Schedule

J 80, J 100, or J 120 for NPS 12x8 CL900 valves

Maximum Inlet Pressures and Temperatures

Consistent with applicable J CL300, J 600

J 900 pressure/temperature ratings per

(2)

J 40

(1)

, or

ASME B16.34 unless limited as follows:

Valves With All Except Cavitrol III or Whisper Trim III Cages: Where limited by individual

pressure/temperature capabilities in figure 8 or 9 or temperature capabilities in table 11, 12, 13, or 20. Valves With Cavitrol III Cages: Where limited by individual pressure/temperature capabilities in figure 12 or temperature capabilities in table 16 or 20 Valves With Whisper Trim III Cages: Where limited by individual pressure/temperature capabilities in figure 15 or 16 or temperature capabilities in table 18 or 20

Maximum Pressure Drops

(1, 3)

Same as maximum inlet pressure for specific construction defined above, except where further limited as follows:

Valves With All Except Cavitrol III or Whisper Trim III Cages: See figure 8 or 9 Valves With Cavitrol III Cages: See figure 12 Valves With Whisper Trim III Cages: 0.999 nP/P

maximum for levels A1 through D3

Construction Materials

Valve, Bonnet, and Bonnet Spacer If Used: carbon steel, moly steel,

J LCC carbon steel, J WC9 chrome

J CF8M (316 SST), J other materials

J WCC

upon request

Valve Plug, Cage, and Metal Seating Parts

Valves With All Except Cavitrol III or Whisper Trim III Cages: See table 5 or 14 Valves With Cavitrol III Cages: See table 15 Valves With Whisper Trim III Cages: See table 17, 18, or

19 All Other Parts: See table 20

Material Temperature Capabilities

(1)

Valve Body/Trim Combinations

Valves With All Except Cavitrol III or Whisper Trim III Cages: See figure 8 or 9 and table 11, 12, or 13 Valves With Cavitrol III Cages: See figure 12 and table

16 Valves With Whisper Trim III Cages: See figure 15 or 16 and table 18 All Other Parts: See table 20

Flow Characteristics

Standard Cages:

J equal percentage

J Quick-opening, J linear, or

Cavitrol and Whisper Trim Cages: Linear

Flow Directions

Valves with Standard Cages

EWD, EWD-1, EWT, and EWT-1: Normally down EWS and EWS-1: Normally up Valves with Cavitrol Cages: Always down

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(5)

Valves with Whisper Trim III Cages: Always up

(5)

(6)

Flow Coefficients and Noise Level Prediction

Refer to Fisher Catalog 12

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

See tables 3 and 4

Port Diameters and Maximum Valve Plug Travels

See table 21

- continued -

Product Bulletin

51.1:EW October 2020

Specifications (continued)

EW Valve

D100023X012

Yoke Boss and Stem Diameters

See table 21

Optional Safety Instrumented System Classification

EWD, EWD-1, EWT, and EWT-1: SIL3 capable — certified by exida Consulting LLC

Typical Bonnet Styles (see table 23)

J Plain, J style 1 cast extension, J style 2 cast

extension,

J ENVIRO-SEAL bellows seal bonnet

Options

J Lubricator, J lubricator/isolating valve, J drilled

and tapped connection in extension bonnet for leak-off service,

J valve body drain plug,

J ENVIRO-SEAL bellows seal bonnet for positive stem

Packing Arrangements

J Standard PTFE, J Double PTFE, J Graphite, J ENVIRO-SEAL PTFE, J ENVIRO-SEAL Duplex, J ENVIRO-SEAL Graphite ULF, J HIGH-SEAL

sealing of hard-to-handle fluids at temperatures up to 566_C (1000_F),

J style 3 fabricated extension

bonnet made on order to a specific length for cryogenic service,

J special seismic service bonnet,

J packings suitable for nuclear service, and J forged

bonnet for 5 in. (127 mm) yoke boss on NPS 8x6

Approximate Weights

CL900 valve, (450_F) using PEEK anti-extrusion rings

J Class V shutoff for EWT above 232_C

J Class V

shutoff for EWD up to 593_C (1100_F) using C-seal

See table 22

1. The pressure/temperature limits in this bulletin and any applicable standard or code limitation should not be exceeded.

2. Certain bonnet bolting material selections may require a CL600 easy-e valve assembly to be derated. Contact your Emerson sales office

3. Only NPS 12x8 CL900 valve bodies with threaded (-1) seat rings can take full CL900 pressure drops; CL900 valve bodies with clamped (no dash number) seat rings are limited to CL600 pressure drops. Also, there are two different NPS 8x6 CL900 valve bodies, one for use only with Cavitrol III cages and the other for use with all other constructions. An NPS 8x6 CL900 valve body with Cavitrol III cage can take full CL900 pressure drops. For information on other NPS 8x6 constructions that can take full CL900 pressure drops, contact your Emerson Automation Solutions sales office. All other NPS 8x6 constructions are limited to CL600 pressure drops (1440 psid flowing drop) even though installed in a CL900 valve body.

4. Restriction based on excessive noise if max nP/P1 ratio for a given cage level is exceeded.

5. Down:in through cage and out through seat ring (direction shown in figure 1).

6. Up:in through seat ring and out through cage as shown in figure 13.

trim

for more information.

ENVIRO-SEAL Packing System Specifications

Applicable Stem Diameters

J 19.1 (3/4), J 25.4 (1), and J 31.8 (1-1/4)

diameter valve stems

Maximum Pressure/Temperature Limits

To Meet the EPA Fugitive Emission Standard of 100

(2)

PPM

(1)

For ENVIRO-SEAL PTFE and ENVIRO-SEAL Duplex packing systems: full CL300 up to 232_C (450_F) For ENVIRO-SEAL Graphite ULF packing system: 1500

psig (104 bar) at 316_C (600_F)

Construction Materials

PTFE Packing Systems:

Packing Ring and Lower Wiper: PTFE V-ring

(3)

V-ring

Graphite ULF Packing Systems: Graphite rings Anti-Extrusion Washer: Filled PTFE (not required for

graphite packing) Lantern Ring: S31600 (316 stainless steel) (not required for graphite packing)

Packing Box Flange: S31600 Spring:

J 17-7PH stainless steel, J N06600, or

J S17700

Packing Follower: S31600 lined with carbon-filled PTFE Packing Box Studs: Strain-hardened 316 stainless steel Packing Box Nuts: 316 stainless steel SA194 Grade 8M

Male and Female Adaptor Rings: Carbon-filled PTFE

1. Refer to the valve specifications in this bulletin for pressure/temperature limits of valve parts. Do not exceed the pressure/temperature rating of the valve. Do not exceed any applicable code or standard limitation.

2. The Environmental Protection Agency (EPA) has set a limit of 100 parts per million (ppm) for fugitive emissions from a valve in selected VOC (Volatile Organic Compound) services.

3. In vacuum service, it is not necessary to reverse the ENVIRO-SEAL PTFE packing rings.

EW Valve

)

D100023X012

Figure 1. Fisher EWD Valve with Standard Cage

PTFE V-RING

BONNET GASKET

SHIM

SPIRAL WOUND GASKET

W9035

TYPICAL OF CONSTRUCTIONS THROUGH NPS 12x6

PACKING

GRAPHITE PISTON RING

CAGE

SEAT RING

SEAT RING GASKET

VALVE PLUG

Product Bulletin

51.1:EW

October 2020

LOAD RING

CAGE RETAINER

W9036

NPS 12x8 CONSTRUCTION

NOTE: The NPS 10x8 valve is similar in appearance to sizes through NPS 12x6. However, the NPS 10x8 uses the load ring shown for the NPS 12x8. It does not use the cage retainer.

Figure 2. Fisher EWT Trim Details

SOFT BACKUP RING

SEAL RING

RETAINING RING

SEAL RING (SHOWN POSITIONED FOR USE WITH STANDARD AND CAVITROL CAGES)

METAL BACKUP RING

W2914−1 / IL

178 mm (7 INCH) AND LARGER PORTS

METAL DISC SEAT

W0992-3

PTFE DISC

METAL DISC RETAINER

STANDARD CONSTRUCTION (SEAT PARTS ALSO TYPICAL OF OPTIONAL EWS PTFE SEATING

W0995-2

137 mm (5.375 INCH) AND SMALLER PORTS

SEAL RING (SHOWN POSITIONED FOR USE WITH STANDARD AND CAVITROL CAGES)

VALVE PLUG WITH OPTIONAL

PRESSURE-ASSISTED SEAL RING

Product Bulletin

51.1:EW October 2020

EW Valve

D100023X012

Figure 3. Fisher EWS Trim Details Showing Standard Cage and Seating Construction

W0989-2

CLAMPED METAL SEAT RING

C-seal Trim Description

C-seal trim (figure 5) is available for valves with port diameters from 2.875 inches through 8 inches.

With C-seal trim, a balanced valve can achieve high-temperature, Class V shutoff. Because the C-seal plug seal is formed from metal (N07718 nickel alloy) rather than an elastomer, a valve equipped with the C-seal trim can be applied in processes with a fluid temperature of up to 593_C (1100_F).

ENVIRO-SEAL and HIGH-SEAL Packing Systems

Fisher ENVIRO-SEAL and HIGH-SEAL packing systems (figure 17) offer excellent sealing capabilities. These systems easily install in your existing valves or can be purchased with new valves. These systems help you seal your process to conserve valuable process fluid and to protect the environment against the emission of hazardous or polluting fluids. The long-life and reliability of these systems also reduce your maintenance cost and downtime.

For applications requiring compliance with environmental protection regulations, the unique ENVIRO-SEAL packing system and, for hazardous service, the ENVIRO-SEAL bellows seal bonnet (figure

18) are offered. The emission control packing system or seal bonnet keeps emission concentrations below the EPA 100 ppm requirement.

For an excellent stem seal in applications that are not environmentally-sensitive, the HIGH-SEAL Graphite ULF packing system is offered. The HIGH-SEAL packing system provides excellent sealing at pressure/temperature ratings beyond ENVIRO-SEAL limits.

ENVIRO-SEAL packing systems, available with PTFE, Graphite ULF, or Duplex packing, and the HIGH-SEAL Graphite ULF packing system feature live-loading and unique packing-ring arrangements for long-term, consistent sealing performance.

EW Valve

D100023X012

Figure 4. Fisher NPS 12x8 CL900 EWT-1 Valve

SEAL RING (SHOWN POSITIONED FOR USE WITH STANDARD CAGES)

Product Bulletin

51.1:EW

October 2020

W9037

THREADED SEAT RING

Product Bulletin

51.1:EW October 2020

EW Valve

D100023X012

Figure 5. C-seal Trim

STAKE THREAD

PISTON RING

RETAINER

C-SEAL METAL PLUG

(1)

SEAL

A6869

NOTES:

1. Reverse the orientation of the C-Seal plug seal proper shutoff when valve is used in a process with different fluid flow direction.

FLOW DOWN

C-SEAL METAL PLUG

(1)

SEAL

VALVE PLUG

FLOW UP

Figure 6. Typical Balanced TSO Trim

A7096

VALVE PLUG SEAL

PROTECTED SOFT SEAT

Product Bulletin

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(2,3)

(3)

(2)

EW Valve

D100023X012

Table 1. Metal Trim Part Materials for Compatibility with NACE MR0175-2002 (Sour Service) Specifications, Environmental Restrictions Apply, Refer to Standard

Disk Seat and

Retainer for

Optional

PTFE-Seat

Construction

Valve Stem, Packing

Follower, Lantern Ring,

Packing Box Ring, and

S20910 (Valve Stem)

S31600 (All Other Parts)

Trim Designation Valve Plug Cage

316 SST with

S31600

electroless nickel

coating (ENC)

316 SST with

85C

S31600

electroless nickel

coating (ENC)

S31600 with seat

hard faced with

CoCr-A hardfacing

alloy

S31600 with seat

and guide hard

faced with CoCr-A

hardfacing alloy

S31600 with seat

87C

and guide hard

faced with CoCr-A

hardfacing alloy

1. NPS 10x8 and 12x8 valve body only.

2. 85C and 87C are trims for PTFE-seat constructions in EWS and EWT valves.

3. Not for use with Whisper Trim I with 5-3/8 inch and larger ports.

316 SST with

electroless nickel

coating (ENC)

316 SST with

electroless nickel

coating (ENC)

316 SST with

electroless nickel

coating (ENC)

Seat Ring

for Standard

Metal Seat

Construction

S31600 - - -

- - - S31600

R30006 (alloy 6) - - -

- - - S31600

October 2020

51.1:EW

Load Ring

N05500

Figure 7. Typical Trim for NACE MR0175-2002 (Sour Service) (tables 11, 12, and 13 should be used along with these graphs to determine specific limits based on valve size and trim selection)

FLUID TEMPERATURE, °C

−100 −50 0 50 100 150 200 250

1600

1400

1200

1000

800

600

400

PRESSURE DROP, PSI

200

−200 −100

A3115-3

NOTES:

Use trim 87 instead of trim 85 for non-lubricating fluids such as superheated steam or dry gasses between 149°C (300°F) and 316°C (600°F).

Do not exceed the maximum pressure and temperature for the class rating of the body material used, even through the trims shown may have higher capabilities.

Use trim 85 up to 99 BAR (1440 PSI) with clean dry gas. For process fluids other than clean dry gas, use trim 85 only up to 21 bar (300 PSI).

Trim 87 temperature limit can be extended above 232°C (450°F) If PEEK anti-extrusion rings and spring-loaded seal ring are used.

FOR STANDARD PTFE SEATING WITH ALL

87C

85C

0 100 200 300 400 500

−50 FLUID TEMPERATURE, °F

BODY MATERIALS

110 100 90

80 70 60 50 40 30 20 10 0

PRESSURE DROP, BAR

−100 −50 0 50 100 150 200 250

1600

1400

1200

1000

800

600

400

PRESSURE DROP, PSI

200

−200 −100 0 100 200 300 400 500 600

FOR OPTIONAL METAL SEATING WITH

FLUID TEMPERATURE, °C

FLUID TEMPERATURE, °F

CF8M MATERIAL

300

110 100 90

80 70

450

60 50 40 30

PRESSURE DROP, BAR

20 10 0

Product Bulletin

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51.1:EW October 2020

Table 2. Available Valve Constructions

VALVE

4x2 6x4 8x4 8x6 10x6

EWD

EWD-1

EWS

EWS-1

EWT

EWT-1

1. X indicates available construction.

2. Two-number valve size designates end connection size x effective trim size.

3. NPS 10x6 has a valve outlet area identical to the NPS 8x6.

- - -

- - x

- - -

D100023X012

VALVE SIZE

CL150, 300, or 600 CL900

- - x

- - -

- - x

- - -

, NPS

12x6 10x8 12x8 8x6 12x8

- - x

- - -

- - x

- - -

EW Valve

x x x x x x

Available Configurations

All configurations covered in this bulletin use a single-port, globe-style valve body with cage guiding and push-down-to-close valve plug action. This valve style is combined with different plug styles and either a clamped seat ring (no dash number suffix) or a seat ring threaded into the valve body (-1 suffix).

EWD: Balanced valve plug (figure 1) with clamped seat ring and metal-to-metal seating for all general applications over a wide range of pressure drops and temperatures.

EWD-1: NPS 12x8 CL900 EWD valve body, with threaded seat ring.

EWS: Unbalanced valve plug (figure 3) with clamped seat ring and metal-to-metal or optional metal-to-PTFE seating for all general applications requiring better shutoff capabilities than can be obtained with the EWD valve body.

EWS-1: NPS 12x8 CL900 EWS valve body, with threaded seat ring and metal-to-metal seating.

Material Selection Guidelines

Regardless of valve construction, select the valve body/bonnet material from the specifications table, keeping in mind that the valve service conditions cannot exceed the ASME pressure/temperature limitations for the selected valve body. Then, perform steps 1 and 2 under the appropriate valve design heading to complete the selection process.

EWD, EWS, or EWT Valve with all except Cavitrol III or Whisper Trim III Cages

1. Choose a trim combination for the service conditions according to figure 7 and 8, while making sure from tables 1 and 5 that this combination provides the desired trim materials. Then, make sure from table 11, 12, or 13 that the valve body/trim temperature limits are not exceeded.

2. Finally, check in table 20 that packing and other valve parts are available in materials that meet the desired service conditions.

EWT: Balanced valve plug (figure 2) with metal-to-PTFE seating (for stringent shutoff requirements) standard in all EWT valves (except those with Cavitrol III cages). Metal-to-metal seating for higher temperatures is standard for all EWT valve bodies with Cavitrol III cages and optional for these valves with other cages.

EWT-1: NPS 12x8 CL900 EWT valve body, with threaded seat ring and with metal-to-metal seating (figure 4).

EWD-1, EWS-1, or EWT-1 Valve with Standard Cage

1. Choose a trim combination for the service conditions according to figure 9, while making sure from table 7 that this combination provides the desired trim materials.

2. Finally, check in table 20 that packing and other valve parts are available in materials that meet the desired service conditions.

Product Bulletin

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EW Valve

D100023X012

Table 3. Shutoff Classifications per ANSI/FCI 70-2 and IEC 60534-4

Valve Seating Shutoff Class

EWD or EWD-1 Metal

III (optional for NPS 6x4 through 12x8 valves)

IV (optional for NPS 6x4 through 12x8 valves with optional multiple graphite piston rings)

EWS or EWS-1 Metal

V (optional, consult your Emerson sales office)

EWS PTFE VI

EWT with all except

Cavitrol III cages

EWT with

1-stage Cavitrol III cage

EWT with 2-stage Cavitrol III cage

or 2- or 3-stage Cavitrol III cage

EWT-1 Metal IV

1. Class V shutoff for EWT requires spring-loaded seal ring, radius-seat plug, and wide-bevel seat ring. Not available with 8-inch port, quick-opening cage. Not available with S31600 (316 SST) valve plug and seat ring (trims 4, 29, 85).

PTFE

Metal

Metal or PTFE V

Table 4. C-seal Shutoff Classification

Valve Valve Size, NPS Port Diameter, mm (Inches) Cage Style ANSI/FCI Leakage Class

6x4x2 1/2 73 (2.875) Eq. %, Linear, Whisper I, Cav III (2-Stage)

6x4 8x4 6x4 8x4 8x6

12x6

EWD (CL300, 600)

1. NPS 10x6 has a valve outlet area identical to the NPS 8x6.

10x6

8x6

10x6

12x6 10x8 12x8 10x8 12x8

111.1 (4.375)

87.3 (3.4375) Whisper III

136.5 (5.375) Cav III (2-Stage), Whisper III

136.5 (5.375) Whisper III

177.8 (7)

203.2 (8)

177.8 (7) Whisper III

Eq. %, Linear, Whisper I, Cav III (1-Stage),

II (standard)

IV (standard)

V (optional)

IV (standard)

V (optional)

Whisper III

Class V to 593°C (1100°F)

[for port diameters from

73 through 203.2 mm

(2.875 though 8-inch) with

optional C-seal trim]

Whisper III

51.1:EW

October 2020

EWT Valve with Cavitrol III Cage

1. Choose a trim combination for the service conditions according to figure 12, while making sure from table 15 that this combination provides the desired trim materials. Then, make sure from table 16 that the valve body/trim temperature limits are not exceeded.

2. Finally, check in table 20 that packing and other valve parts are available in materials that meet the desired service conditions.

EWD, EWS, or EWT Valve with Whisper Trim III Cage

1. Choose a trim combination for the service conditions from table 17. Then, make sure from table 18 that the valve body/trim temperature limits are not exceeded.

2. Finally, check in table 20 that packing and other valve parts are available in materials that meet the desired service conditions.

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