Fisher Manuals & Guides: Fisher Vee-Ball SS-84PSV4 NPS 4x3 Rotary Control Valve Manuals & Guides
Instruction Manual
D103416X012
Fisherr Vee-Ballt SS-84PSV4 NPS 4x3
Rotary Control Valve
SS-84PSV4 Valve
November 2010
Contents
Introduction 1.................................
Scope of Manual 1.............................
Description 2.................................
Specifications 2...............................
Principle of Operation 2.........................
Installation 3
Lifting Guidelines 4............................
Maintenance 6..................................
Packing Maintenance 6.........................
Replacing the Trim Parts 12.....................
Troubleshooting 14.............................
Actuator Mounting 14
Determining Closed Position 14..................
Parts Ordering 15................................
Spare Parts 16..................................
Parts List 15.....................................
....................................
Replacing Packing 6........................
Packing Load Adjustment 11.................
............................
Introduction
Figure 1. Fisher SS-84PSV4 Valve
with 1052PSV Actuator and 3610J Positioner
W9722
Scope of Manual
This instruction manual provides installation, operation, maintenance, and parts information for the Fisher Vee‐Ball
SS-84PSV4 NPS 4x3 rotary control valve (see figure 1). It also outlines the assembly and testing procedures for the NPS
4x3 CL2155 SS-84PSV4 rotary ball valve designed for use with the 1052PSV size 60 rotary actuator.
The SS-84PSV4 valve is the pressurizer spray valve for use in third generation PWR Nuclear Generating Stations. The
NPS 4x3 valve body has NPS 4 buttweld ends with 3 inch Fisher Vee-Ball internal trim, which operates against a
spring-loaded sleeve seal.
This valve contains several enhanced features compared to the original SS-84 designs which operated in previous PWR
Reactors. These features include the following:
D VeeBall, drive shaft, and actuator lever connections are a missing tooth spline design ensuring One-Way only
assembly.
D Side body flange allows trim removal without actuator removal.
www.Fisher.com
SS-84PSV4 Valve
November 2010
Table 1. Specifications
Instruction Manual
D103416X012
Valve Sizes and End Connection Styles
SS-84PSV4: NPS 4x3 valve with Schedule 120
buttweld ends
Standard Flow Direction
Forward (into the convex face of the Vee‐ball)
Actuator Mounting
Right‐hand
1. The pressure/temperature limits in this manual, and any applicable code or standard limitation, should not be exceeded.
D Actuator closed position adjustment features an external alignment procedure without the need to position and
hold the VeeBall precisely centered in the sleeve seal.
D Integrated actuator turnbuckle adjustment feature to precisely position the VeeBall without any linkage
disconnects.
D Fisher live-loaded packing, with positive stop screws controlling Belleville deflection, ensures correct packing stress
which maximizes cycle life and prevents premature packing wear.
Do not install, operate, or maintain an SS-84PSV4 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 Process Management sales office before
proceeding.
Maximum Ball Rotation
Standard: Ball rotates counterclockwise to close
when viewed from actuator side of valve
Ball rotation is 80 degrees
Valve/Actuator Action
Push‐down‐to‐open (extending actuator rod opens
valve.) See actuator manual for details
Description
The SS-84PSV4 Vee-Ball valve (figure 1) with a V‐notch ball is used in throttling or on‐off service. The SS-84PSV4 valve
is an NPS 4 schedule 120 buttweld construction, per Westinghouse weld end configuration requirements. The splined
valve shaft of this valve connects to a variety of rotary‐shaft actuators.
Specifications
Specifications for these valves are shown in table 1.
Principle of Operation
The Vee-Ball and machined body combine to create smoothly transitioning flow geometry which enables efficient
flow through the valve. The drive shaft and follower shaft center the ball in the flow stream to minimize dynamic
torque and permit easy ball rotation.
The ball rotates clockwise out of the sleeve seal to a standard open rotation of 80 degrees. In the closed position, the
sleeve seal is spring loaded against the ball to create an effective seal. The drive linkage between the ball and shaft has
been designed for minimal lost motion using a “spline connection” on the shaft and ball.
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Instruction Manual
D103416X012
SS-84PSV4 Valve
November 2010
Installation
Key numbers in installation procedures are shown in figure 8 unless otherwise indicated.
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 either the valve body rating or the mating pipe flange joint rating. To avoid such
injury or damage, provide a relief valve for overpressure 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.
WARNING
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. To avoid possible personal injury and because
some valve/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.
WARNING
The valve drive shaft is not necessarily grounded to the pipeline when installed. Personal injury or property damage could
result from an explosion caused by a discharge of static electricity from valve components if the process fluid or the
atmosphere around the valve is flammable. If the atmosphere around the valve or the process fluid is flammable,
electrically bond the drive shaft to the valve.
Note
Standard graphite packing is composed of all conductive graphite ribbon packing. Alternate shaft‐to‐valve body bonding is
available for hazardous service areas where the standard packing is not sufficient to bond the shaft to the valve (see the following
step).
1. If the valve is to be stored before installation, protect the buttweld ends and keep the valve body cavity dry and free
of foreign material.
2. The valve is normally shipped as part of a control valve assembly, with an actuator mounted on the valve. If the
valve and actuator have been purchased separately or if the actuator has been removed, mount the actuator
according to the Actuator Mounting section and the appropriate actuator instruction manual.
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SS-84PSV4 Valve
November 2010
Instruction Manual
D103416X012
3. Standard flow direction is forward flow, spherical face of the ball is upstream.
4. Install the valve in a horizontal pipeline with the drive shaft in the horizontal position.
CAUTION
Do not allow the valve to be installed in the pipeline with the drive shaft in the vertical position because of excessive wear
to valve component parts.
5. The actuator is right‐hand mounted with the shaft in a horizontal orientation as shown in figure 1. If necessary,
refer to the appropriate actuator instruction manual for actuator installation and adjustment procedures.
CAUTION
Ensure the valve and adjacent pipelines are free of foreign material that could damage the valve seating surfaces.
6. Be certain the valve and adjacent pipelines are free of any foreign material that could damage the valve sealing
surfaces.
7. Be sure the pipelines are in line with each other.
8. Use accepted pipeline piping and welding practices when installing the valve in the pipeline.
9. Connect pressure lines to the actuator as indicated in the actuator instruction manual. When an auxiliary manual
actuator is used with a power actuator, install a bypass valve on the power actuator (if one is not supplied) for use
during manual operation.
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.
10. Verify that gap “A”, in figure 7, is closed before pressurizing the pipeline.
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.
Lifting Guidelines
CAUTION
Care must be taken when lifting the valve/actuator assembly to ensure the accessories and tubing are not damaged in the
process. The entire assembly with accessories weighs approximately 340 kg (750 lb). Make sure to use appropriate lifting
straps/eyebolts/hoists capable of lifting this weight.
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Instruction Manual
D103416X012
Figure 2. Lifting Guidelines
SS-84PSV4 Valve
November 2010
VALVE/ACTUATOR ASSEMBLY VALVE ONLY ACTUATOR ONLY
W100061
W100062
W100063
Lifting Valve/Actuator Assembly
To lift the assembly, insert 3/4-10 eyebolts into the two tapped holes on the top of the valve body. These two tapped
holes will carry most of the weight, but the assembly must be balanced using a strap on the 1052PSV casing as shown
in figure 2. The ends of the strap will be positioned underneath two L-shaped flanges or through eyebolts. Figure 2
shows L-shaped flanges attached to the casings. An alternative casing lift method is to use 3/8 inch eyebolts
positioned 180 degrees apart. Use protective pads between the strap and the casing to help prevent damage to the
painted surface. Torque the 3/8-24 cap screws or eyebolts and nuts to 20 lbf•-ft. The assembly can now be lifted using
a hoist capable of leveling these lifting points.
Lifting Valve Only
To lift the valve, insert 3/4-10 eyebolts into the two tapped holes on the top of the valve body. These two tapped holes
will carry most of the weight, but the assembly must be balanced using a strap underneath the valve bottom flange
(key 5 in the SS-84PSV4 instruction manual, D103416X012), as shown in figure 2. The assembly can now be lifted
using a hoist capable of leveling the 3 lifting points.
Lifting Actuator Only
The actuator with accessories shall be lifted by the casing flange as shown in figure 2. Figure 2 shows L-shaped flanges
attached to the casings. An alternative casing lift method is to use 3/8 inch eyebolts positioned 180 degrees apart. Use
protective pads between the strap and the casing to help prevent damage to the painted surface. Torque the 3/8-24
cap screws or eyebolts and nuts to 20 lbf•ft. A single hoist lift point on the strap will balance and lift the actuator in a
level manner.
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SS-84PSV4 Valve
November 2010
Instruction Manual
D103416X012
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.
Key numbers in this procedure are shown in figure 8, unless otherwise noted.
WARNING
The Vee‐ball closes with a shearing, cutting motion, which could result in personal injury. To avoid injury, keep hands, tools,
and other objects away from the Vee‐ball while stroking the valve.
Avoid personal injury 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 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 Always wear protective gloves, clothing, and eyewear when performing any maintenance operations.
D The valve packing area may contain process fluids that are pressurized. Process fluids may spray out under pressure
when removing the packing hardware or packing rings.
D Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
Packing Maintenance
Key numbers in this procedure are shown in figure 8, unless otherwise noted. A detailed view of the packing is also
shown in figure 7.
Refer to the Parts List section of this manual for individual parts.
If the packing is relatively new and tight on the drive shaft (key 9), and if tightening the packing nuts (key 27) does not
stop leakage, it is possible that the drive shaft is worn or nicked so that a seal cannot be made. If the leakage comes
from the outside diameter of the packing, it is possible that the leakage is caused by nicks or scratches on the packing
box wall. Inspect the drive shaft and packing box wall for nicks or scratches while performing the following procedure.
Replacing Packing
Disassembly
WARNING
Observe the steps in the WARNING at the beginning of the Maintenance section.
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