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Instruction Manual
D100714X012
Fisher
461
™
Increased Outlet Angle Sweep-Flo Valve
Contents
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Introduction
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
proceeding.
www.Fisher.com
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Figure 1. Fisher 461 Valve with 657 Actuator
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W9553-2
Emerson sales office
or Local Business Partner before
461 Valve
June 2017
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Table of Contents
Related Manuals for Fisher 461
Summary of Contents for Fisher 461
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Page 1: Table Of Contents
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. -
Page 2: Specifications
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. -
Page 3: Maintenance
Instruction Manual 461 Valve D100714X012 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. -
Page 4: Packing Lubrication
Instruction Manual 461 Valve June 2017 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. -
Page 5: Packing Maintenance
Instruction Manual 461 Valve D100714X012 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). - Page 6 Instruction Manual 461 Valve June 2017 D100714X012 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.
- Page 7 Instruction Manual 461 Valve D100714X012 June 2017 Figure 4. ENVIRO-SEAL and HIGH-SEAL Packing Systems PACKING PACKING STUDS STUD SPRINGS SPRINGS ANTI- EXTRUSION PACKING RING RING FOLLOWER LANTERN VALVE PACKING RING BONNET W5803-3 W8532-1 TYPICAL ENVIRO-SEAL PACKING SYSTEM TYPICAL ENVIRO-SEAL PACKING SYSTEM...
- Page 8 Instruction Manual 461 Valve June 2017 D100714X012 3. Remove the yoke locknut (key 26), and remove the actuator from the bonnet (key 14). 4. Loosen the packing flange nuts (key 25) so that the packing is not tight on the valve plug stem (key 10). Remove any travel indicator disk and stem locknuts from the valve plug stem threads.
- Page 9 Instruction Manual 461 Valve D100714X012 June 2017 Figure 5. Installing Graphite Ribbon/Filament Packing Rings One at a Time VALVE STEM PACKING FOLLOWER BONNET TOP OF PACKING RING EVEN WITH BOTTOM OF ENTRANCE CHAMFER INSTALLING INSTALLING FIRST PACKING RING SECOND PACKING RING A2207‐2...
- Page 10 Instruction Manual 461 Valve June 2017 D100714X012 When all nuts are tightened to that torque value, increase the torque by 1/4 of the specified nominal torque and repeat the crisscross pattern. Repeat this procedure until all nuts are tightened to the specified nominal value. Apply the final torque value again and, if any nut still turns, tighten every nut again.
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Page 11: Replacing Trim
Instruction Manual 461 Valve D100714X012 June 2017 Replacing Trim Refer to figure 6. Disassembly 1. Remove the actuator and the bonnet according to steps 1 through 6 of the Replacing Packing section. 2. Remove the valve plug and stem assembly (keys 3 and 10) from the valve. If the stem needs to be replaced, drive the pin (key 11) out, and unthread the stem from the plug. -
Page 12: Assembly
Instruction Manual 461 Valve June 2017 D100714X012 Table 4. Recommended Torque for Valve Body to Bonnet Nuts TORQUE STUD DIAMETER, B7/2H S20910 VALVE SIZE, NPS PRESSURE RATING INCHES lbfSft lbfSft CL300 CL600 CL900 CL1500 CL2500 1-1/8 CL300 CL600 CL900 CL1500... -
Page 13: Lapping Seating Surfaces
Instruction Manual 461 Valve D100714X012 June 2017 When all nuts are tightened to that torque value, increase the torque by 1/4 of the specified nominal torque and repeat the crisscross pattern. Repeat this procedure until all nuts are tightened to the specified nominal value. Apply the final torque value again and, if any nut still turns, tighten every nut again. -
Page 14: Parts Ordering
Use only genuine Fisher replacement parts. Components that are not supplied by Emerson Automation Solutions should not, under any circumstances, be used in any Fisher valve, because they may void your warranty, might adversely affect the performance of the valve, and could cause personal injury and property damage. -
Page 15: D100714X012 June
Instruction Manual 461 Valve D100714X012 June 2017 Figure 6. Fisher 461 Valve Assembly KEYS 33, 34, 35, 36, 37, 40, 41, AND 42 NOT SHOWN... - Page 16 Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user. Fisher and ENVIRO-SEAL are marks owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Automation Solutions, Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co.