Fisher 461 Instruction Manual

Instruction Manual

D100714X012

Fisher™ 461
Increased Outlet Angle Sweep-Flo Valve

461 Valve

June 2017

Contents

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

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

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

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

Educational Services 2.........................

Installation 2..................................

Maintenance 3.................................

Packing Lubrication 4..........................

Packing Maintenance 5.........................

Adding Packing Rings 5.....................

Replacing Packing 5........................

Replacing Trim 11.............................

Disassembly 11............................

Assembly 12..............................

Lapping Seating Surfaces 13....................

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

Parts List 14...................................

Introduction

Figure 1. Fisher 461 Valve with 657 Actuator

W9553-2

Scope of Manual

This instruction manual includes installation, maintenance, and parts information for the Fisher 461 anti-coke valve.
Refer to separate manuals for instructions covering the actuator, positioner, and accessories.

Description

The 461 valve (figure 1) is a self-cleaning, increased-outlet, angle valve that is typically used in the chemical and
hydrocarbon industries where control of residual oils or other liquids with coking properties is necessary. The 461
features a venturi-type throat, which is useful in power plants or slurry services where high pressure drops and flashing
might exist.

Do not install, operate, or maintain a 461 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
proceeding.

www.Fisher.com

or Local Business Partner before

461 Valve

June 2017

Table 1. Specifications

Instruction Manual

D100714X012

Valve Sizes (inlet size x outlet size)

NPS J 2x3, J 3x4, J 4x6, and J 6x8

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

Standard: Class IV
Optional: Class V

Flow Characteristic

Equal percentage Micro-Form flow characteristic in

the 12.7 to 31.8 mm (0.5 to 1.25 inch) port size and a
modified parabolic flow characteristic in the 38.1 to

114.3 mm (1.5 to 4.5 inch) port size.

Flow Direction

Flow down

Packing Arrangement

PTFE and graphite ribbon/filament are available as
standard packing.

Specifications

Specifications for the 461 valve are shown in table 1. If the valve is shipped with the actuator, some of the valve
specifications are on the valve nameplate, which is attached to the actuator. If the valve is shipped without the
actuator, the valve nameplate is wired to the valve.

Educational Services

For information on available courses for Fisher 461 valves, as well as a variety of other products, contact:

Emerson Automation Solutions
Educational Services - Registration
Phone: [phone] or 1-800-338-8158
E-mail: [e-mail]
emerson.com/fishervalvetraining

Installation

WARNING

To avoid personal injury or equipment damage caused by sudden release of pressure, install the valve assembly only where
service conditions will not exceed the limits given on the appropriate nameplate.

Always wear protective gloves, clothing, and eyewear when performing any installation operations to avoid personal
injury.

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.

1. Before installing a 461 valve, inspect it for any foreign material that may have collected during crating or shipping.

2. Check that the pipelines are free of pipe scale, chips, welding slag, and other foreign material.

3. Use accepted piping practices when installing the valve.

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Instruction Manual

D100714X012

461 Valve

June 2017

4. Do not install the valve in a system where the service conditions exceed those specified when the valve was

ordered.

5. If continuous operation is required during maintenance and inspection, install a three-valve bypass around the valve

body so that it will be isolated.

6. Orient the valve body so that the flow will be in the direction indicated by the flow direction arrow located on the

outside of the valve body to ensure proper self-cleaning action.

7. If the actuator and valve are shipped separately, refer to the actuator mounting procedure outlined in the

appropriate actuator instruction manual.

8. If the valve body was shipped without packing installed in the packing box, install the packing before putting the

valve body into service. Refer to instructions given in the Packing Maintenance procedure.

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 or HIGH‐SEAL Heavy‐Duty live‐loaded packing will not require this
initial re‐adjustment. See the instruction manuals titled ENVIRO‐SEAL Packing System for Sliding‐Stem Valves,

D101642X012

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.

, or HIGH‐SEAL Live‐Loaded Packing System, D101453X012, (as appropriate) for packing instructions. If

Maintenance

Valve parts are subject to normal wear and must be inspected and replaced as necessary. The frequency of inspection
and replacement depends upon the severity of service conditions.

WARNING

Avoid personal injury or property damage from sudden release of process pressure or bursting of parts. 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 power 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.

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461 Valve

June 2017

Instruction Manual

D100714X012

Note

If the valve has ENVIRO‐SEAL live‐loaded packing installed (figure 4), see the instruction manual entitled ENVIRO‐SEAL Packing
System for Sliding‐Stem Valves, D101642X012

, for packing instructions.

If the valve has HIGH‐SEAL Heavy‐Duty live‐loaded packing installed (figure 4), see the instruction manual entitled HIGH‐SEAL
Live‐Loaded Packing System, D101453X012

, for packing instructions.

Figure 2. Lubricator and Lubricator/Isolating Valve

12

LUBRICATOR

12

10A9421‐A

AJ5428‐D

A0832‐2

LUBRICATOR/ISOLATING VALVE

Packing Lubrication

Note

To avoid lubricants breaking down at elevated temperatures, do not lubricate packing used in processes with temperatures over
260_C (500_F).

WARNING

Do not lubricate parts when used in oxygen service, or where the lubrication is incompatible with the process media. Any
use of lubricant can lead to the sudden explosion of media due to the oil/oxygen mixture, causing personal injury or
property damage.

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 pipe plug (key 12, figure 6). Use a good quality 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.

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Instruction Manual

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461 Valve

June 2017

Packing Maintenance

If there is undesirable packing leakage in the spring‐loaded PTFE V‐ring packing shown in figure 3, tighten the packing
flange nuts (key 25, figure 6) until the shoulder on the packing follower (key 29, figure 6) contacts the bonnet (key 14,
figure 6). If leakage continues, replace the packing by following the numbered steps presented in the replacing
packing procedure.

If there is undesirable packing leakage with other than spring‐loaded PTFE V‐ring packing, first try to limit the leakage
and establish a stem seal by tightening the packing flange nuts (key 25, figure 6) to at least the minimum
recommended torque in table 2 or 3. However, do not exceed the maximum recommended torque in table 2 or 3 or
excessive friction may result. If leakage continues, replace the packing by following the numbered steps presented in
the Replacing Packing procedure.

If the packing is relatively new and tight on the valve plug stem, and if tightening the packing flange nuts does not stop
the leakage, it is possible that the stem is worn or nicked so that a seal cannot be made. The surface finish of a new
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. While replacing the packing
according to the Replacing Packing procedure, inspect the valve plug stem and packing box wall for nicks or scratches.

Adding Packing Rings

Key numbers referred to in this procedure are shown in figure 6, unless otherwise indicated.

When using packing with a lantern ring, it may be possible to add packing rings above the lantern ring as a temporary
measure without removing the actuator from the valve body.

1. 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. If using a power actuator, also shut off all pressure lines to the power
actuator, release all pressure from the actuator. Use lock‐out procedures to be sure that the above measures stay in
effect while you work on the equipment.

2. Remove the packing flange nuts (key 25) and lift the packing flange, upper wiper, and packing follower (keys 23, 16,

and 29) away from the valve body.

3. 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 plug stem or packing box wall. Clean all metal parts to remove particles that would prevent the packing from
sealing.

4. Remove the stem connector and slip the packing rings over the end of the valve plug stem.

5. Reassemble the packing follower, upper wiper, packing flange, and packing flange nuts (keys 29, 16, 23, and 25).

6. Reconnect the body‐actuator stem connection according to the appropriate actuator instruction manual.

7. Tighten the packing flange nuts only far enough to stop leakage under operating conditions. Check for leakage

around the packing follower when the valve is being put into service. Retighten the packing flange nuts as required
(see table 2 or 3).

Replacing Packing

WARNING

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

Key numbers referred to in this procedure are shown in figure 6, unless otherwise indicated.

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