Dyna 380 User manual

Model 380 Control Valve (8 Inch Only)
Dyna-Flo Control Valve Services Ltd.
Phone: 780 •469 •4000 Toll Free: 1 •866 •396 •2356 Fax: 780 •469 •4035 Website: www.dynaflo.com
P-388M0319A 1
Operation, Parts, and Instruction Manual
TABLE OF CONTENTS
Introduction 2 Assembly 8
General 2 Plug Seal Assembly 8
Scope 2 Trim Parts Assembly 9
Specifications 3 Bonnet Assembly 10
Unpacking 4 Packing Assembly 10
Installation 4 Bolting Material and Designations - Table 1 11
Air Piping 4 Body to Bonnet Stud Torque - Table 2 11
Periodic Inspection 5 Valve Stem Connection Details - Table 3 11
Maintenance 5 Seat Ring Cap Screw Torque - Table 4 11
Removing Actuator 5 Packing Nut Torque - Table 5 11
Needle Valve Setup - Figure 2 5 Packing Diagrams - Figure 8 12
Rigging Setup - Figure 3 6 Valve Cross Section - Figure 9 13
Actuator Mounting Nuts and Bolts - Figure 4 6 Seat Ring Seal Detail - Figure 10 14
Packing Maintenance 6 Model 381 Cage / Piston Ring Detail - Figure 11 14
Valve Disassembly 7 Parts List 15
Bonnet Removal 7 Model Builder 20
Trim Parts Removal 7
Packing Parts Removal 8
Body Gasket Removal 8
Figure 1 Model 380
Control Valve with DFC
Actuator

Dyna-Flo Control Valve Services Ltd.
Phone: 780 •469 •4000 Toll Free: 1 •866 •396 •2356 Fax: 780 •469 •4035 Website: www.dynaflo.com
Model 380 Control Valve (8 Inch Only)
P-388M0319A 2
Operation, Parts, and Instruction Manual
NOTICE These instructions are meant to be used with the Dyna-Flo 380 Technical Bulletin as they refer to Figures
and Tables therein. If you do not have the Technical Bulletin, contact Dyna-Flo immediately, or visit
www.dynaflo.com
Each control valve is factory tested and checked. Check the calibration for the specific application, before a
valve is put into service.
It is the intention of this document to provide users with an accurate guide for safe installation and
maintenance of the 380 Control Valves. Revisions and updates are available at above mentioned website.
GENERAL
The following instructions are to be thoroughly reviewed and understood prior to installing, operating or performing
maintenance on this equipment. Work on this equipment should be performed by experienced personnel. Throughout
the manual, safety and caution notes appear and must be strictly followed, to prevent serious injury or equipment
malfunction.
SCOPE
The control valve configuration and construction materials were selected to meet particular pressure, temperature, and process fluid
conditions. Some material combinations are limited in their pressure and temperature ranges. Do not apply any other conditions to
the valve without first contacting your Dyna-Flo sales office.
This manual is written to be a practical and useful guide maintaining the Dyna-Flo 380 Control Valve.
CAUTION
To avoid personal injury or installation damage as a result of the sudden release of process pressure or the breaking of
parts, do not install the valve assembly where service conditions could exceed the limits stated in this manual or on
the equipment nameplates. Use government codes, accepted industry standards and good piping practices to select
pressure-relieving equipment for protection of your installation. It is also important to wear the proper
protective equipment when performing any installation or maintenance activity.
INTRODUCTION
The Dyna-Flo 380 series of valves are heavy duty cage guided globe style control valves designed for high pressure applications.
These valves are used in all kinds of demanding applications, including oil and gas production and chemical process.
Both Models 380 and 381 are cage guided control valves with balanced plugs. Model 380 control valves are capable of Class V
shutoff at process temperatures below 450°F (232°C). Model 381 control valves are designed for high temperature / high pressure
applications and are well suited for general applications that do not require tight shutoff.
A bolted bonnet is standard and a typical actuator is a Dyna-Flo Model DFC, DFO, or DFLP linear actuator.

Model 380 Control Valve (8 Inch Only)
Dyna-Flo Control Valve Services Ltd.
Phone: 780 •469 •4000 Toll Free: 1 •866 •396 •2356 Fax: 780 •469 •4035 Website: www.dynaflo.com
P-388M0319A 3
Operation, Parts, and Instruction Manual
SPECIFICATIONS
Configurations
Refer to Table 1 of the Sales Bulletin.
Consult your Dyna-Flo sales office for other available
configurations.
Sizes and End Connection Styles
Models 380 & 381
Size: 8”
Rating: ASME 900 & 1500
Connections: RF / RTJ / BWE
Maximum Inlet Temperatures and Pressures
In accordance with ASME B16.34 Class 1500 unless limited
by material selection shown in Tables 4 to 7, and Figure 9
of the Sales Bulletin.
Maximum Pressure Drops
Same as maximum inlet pressure unless limited by specific
trim construction. For valve assembly shut off pressure drops
refer to Table 8 and Figure 9 of the Sales Bulletin.
Shutoff Classifications
Refer to Table 1 of the Sales Bulletin.
Dimensions
Valve Dimensions
Refer to Table 3 and Figure 2 of the Sales Bulletin.
Approximate Valve Body Weights
Refer to Table 2 of the Sales Bulletin.
Valve Body to Bonnet Bolting
Refer to Table 5 of the Sales Bulletin.
Characteristics
•Equal Percentage (Standard)
•Modified Equal Percentage
•Linear
•Contact factory for Low-Noise and Anti-Cavitation options.
Flow Direction
Flow down through seat ring except when using Low-Noise
trim.
Packing Type and Examples
The standard packing is PTFE V-Ring. Live loaded low
emission, graphite and other packing arrangements are
also available. Refer to Figure 8.
Flow Coefficients
For standard coefficients at maximum travel, refer to Table 7
of the Sales Bulletin.
For full list of coefficients refer to document P-CVSM.
Valve Travel
Refer to Table 7 of the Sales Bulletin.
Trim Materials
Refer to Table 6 of the Sales Bulletin.
Materials
Body and bonnet material options include:
LCC (A350-LF2 optional* bonnet material)
WCC (A350-LF2 optional* bonnet material)
CF8M (A182-F316 optional* bonnet material)
*NOTE: Dyna-Flo reserves the right to substitute a cast
material with the forged bar equivalent in the event a casting
is not available.
Refer to Figure 8 of the Sales Bulletin. Refer to Tables 4 & 5
of the Sales Bulletin for typical construction materials. Refer
to Table 6 of the Sales Bulletin for trim selections.
For more information and other options contact your Dyna-Flo
sales office.

Dyna-Flo Control Valve Services Ltd.
Phone: 780 •469 •4000 Toll Free: 1 •866 •396 •2356 Fax: 780 •469 •4035 Website: www.dynaflo.com
Model 380 Control Valve (8 Inch Only)
P-388M0319A 4
Operation, Parts, and Instruction Manual
UNPACKING VALVE FROM SHIPPING CONTAINER
Check the packing list, verify that the list includes all the materials in the shipping container before unpacking. Valve
information can be found on the nameplate (Key 33). Refer to Figure 3 and xx for possible nameplate locations.
When lifting the valve from shipping container, place properly rated lifting straps securely around the neck of the actuator,
refer to Figure 3 for strap placement. Straps should be placed to avoid damage to tubing and other mounted accessories.
For valve assemblies without an attached actuator, use caution when lifting or positioning straps so as not to damage the valve
stem.
Lift the valve/actuator assembly using proper lifting techniques.
WARNING: The following maintenance procedures require removing the control valve from service. To avoid personnel injury, only
qualified technicians should perform the following procedures. Always ensure the control valve is fully released of pressure or process
fluid before starting maintenance.
INSTALLATION
Before installing the valve, clean dirt, welding chips, scale or other foreign material from the line.
Inspect flange gasket surfaces for damage.
Check packing box bolting for proper tightness. Packing nuts should be slightly over finger-tight; however, tighten only as necessary
to prevent stem leakage.
If the valve has small internal flow passages such as anti-cavitation or low-noise trim the installation of an upstream strainer should
be considered to prevent clogging of these small passages.
CAUTION: Do not over tighten packing! This can cause excessive packing wear and high stem friction that may impede stem
movement! Refer to Table 5 for Packing Nut Torque.
1Install the valve with flow through the valve in the direction indicated in Specifications (Page 3). The valve assembly may be
installed in any position unless limited by vibration considerations.
CAUTION: The normal position of the actuator is vertical above the valve body. In some non-vertical applications, the
actuator may need to be supported.
WARNING: Keep hands, hair and clothing away from all moving parts when operating the valve! Serious injury can result from
failure to do so!
2When possible, stroke the valve and check for smooth operation through the full-stroke. Unsteady valve stem movement could
be an indication of an internal problem.
Air Piping
The actuators are designed to accept 1/4” NPT connection. Use 3/8” OD tubing (or equivalent) for all air lines. All connections must
be free of leaks.
CAUTION: Do not exceed maximum casing pressure indicated on name plate located on the yoke of the actuator or in the Technical
(Sales) Bulletin appropriate for the actuator type.

Model 380 Control Valve (8 Inch Only)
Dyna-Flo Control Valve Services Ltd.
Phone: 780 •469 •4000 Toll Free: 1 •866 •396 •2356 Fax: 780 •469 •4035 Website: www.dynaflo.com
P-388M0319A 5
Operation, Parts, and Instruction Manual
PERIODIC INSPECTION
CAUTION: Use safe work practices and lock out procedures
when isolating valves and actuators! Always be aware of
flammable instrument gas!
1 Avoid personal injury from sudden release of process
pressure! Before performing any maintenance operation:
A Disconnect any power supply media lines providing air
/ gas pressure, electric power, or a control signal to
the actuator. Ensure the actuator cannot suddenly
operate the valve.
B Isolate the valve from process pressure with bypass
valves or completely shut off the process. Relieve
process pressure, and drain the process fluid from the
up and down stream of the valve.
C Vent the pneumatic actuator loading pressure and
relieve any actuator spring preload.
D Use Safety lock-out procedures to be sure that the
above provisions stay in effect while you complete the
work on your equipment.
2 Check for process fluid leakage to the atmosphere through
the body to bonnet joint and (if equipped) any NPT
connection.
3Examine the valve for damage caused by corrosive fumes
or process drippings.
4Clean the valve and repaint areas of severe oxidation.
5Make sure positioner linkage (if equipped) and stem
connector are securely fastened. If the stem connector is
loose, check plug thread engagement and retighten. Refer
to the Actuator Manual for detailed instructions.
6Ensure all accessories, mounting brackets and fasteners
are secure.
7Clean any dirt and foreign material from the valve stem.
MAINTENANCE
Only “Certified Technicians” should be disassembling and
inspecting these valves and actuators.
CAUTION: For diaphragm actuators the spring is under
compression. The actuator is also under pneumatic / gas
pressure. Ensure actuator has been disconnected from supply
lines before starting any work on the actuator. The actuator
needs to be supported before the actuator mounting nut (Key
32) can be removed, failure to support the actuator could result
in actuator damage and/or personal injury.
Removing Actuator from Valve
Refer to the appropriate Actuator Manual for detailed
instructions.
1Disconnect all pneumatic/gas supply lines and any other
lines that might supply pressure to the actuator.
ON MODEL DFC (FAIL CLOSED) ACTUATORS
Connect a supply line to the inlet port of the actuator.
Be sure not to exceed the maximum casing pressure.
This will open the valve and take downward force off the
stem connector.
Figure 2 Needle Valve with Gauge setup

Dyna-Flo Control Valve Services Ltd.
Phone: 780 •469 •4000 Toll Free: 1 •866 •396 •2356 Fax: 780 •469 •4035 Website: www.dynaflo.com
Model 380 Control Valve (8 Inch Only)
P-388M0319A 6
Operation, Parts, and Instruction Manual
MAINTENANCE (Continued)
Removing Actuator from Valve (Continued)
2Remove the stem connector (Refer to the Actuator
Instruction Manual for stem connector removal
instructions).
3Support the actuator - the actuator may be able to be
removed manually on the smaller sizes. It is recommended
the lifting eyes attached to the actuator casing be used
(refer to Figure 3). If there are no lifting eyes, it is advisable
to remove 2 actuator casing cap screws, 180oapart, and
temporarily replace them with eye bolts and nuts. Position
the lifting straps through the lifting eyes or eye bolts to
avoid damage to the tubing and mounted accessories.
4Remove the actuator mounting nuts (Key 32) and lift
actuator off of valve, store in a safe place.
5Remove the jam nuts and travel indicator from the valve
stem. Refer to the actuator manual for disassembly
procedures for actuators.
6Once actuator has been removed from the valve the air
pressure in the actuator can be released.
(DFC actuator only)
NOTE: For Actuator to Valve Mounting (Assembly) see
appropriate Actuator Instruction Manual.
Packing Maintenance
Refer to Figures 8 for packing orientation and Key numbers for
the following section. For live loaded packing instructions, refer
to the P-LLPS Instruction Manual.
For single (spring-loaded) packing:
A Spring-loaded packing has constant force applied to the
packing set (Key 2) through a spring (Key 5) in the
packing bore. Ensure that the packing follower (Key 8) is
in contact with the bonnet (Key 1), if not tighten the packing
nuts (Key 12) until the packing follower comes in contact
with the bonnet. If this does not stop the leak then the
packing will need to be replaced. In some cases the bonnet
and/or stem (Key 17) may need to be polished or replaced.
BRefer to Valve Disassembly section for Packing Removal
and Inspection.
CAUTION: Do not tighten the packing nuts past the
recommended maximum torque value as this will cause high
stem friction and could cause the valve to operate incorrectly.
For double packing / graphite ring packing:
A Double packing consists of two packing sets (Key 2)
separated by a lantern ring (Key 6). Both styles of packing
require that the packing nuts (Key 12) be kept tight to keep
force on the packing. If leakage is detected from the
packing, the packing nuts can be tightened to apply more
force on the packing set (make sure not to exceed the
maximum allowable torque values, refer to Table 2). If this
does not seal off the leak then the packing will need to be
replaced. In some cases the bonnet (Key 1) and/or stem
(Key 17) may need to be polished or replaced.
BRefer to Valve Disassembly section for Packing Removal and
Inspection. Refer to Figure 8 for double and graphite
packing arrangements.
Figure 3 Actuator Lifting Suggestions
Figure 4 Actuator Mounting Nuts and Bolts
32
33
LIFTING STRAP
xx

Model 380 Control Valve (8 Inch Only)
Dyna-Flo Control Valve Services Ltd.
Phone: 780 •469 •4000 Toll Free: 1 •866 •396 •2356 Fax: 780 •469 •4035 Website: www.dynaflo.com
P-388M0319A 7
Operation, Parts, and Instruction Manual
VALVE DISASSEMBLY
CAUTION: If maintenance is to be performed on the valve
in-line, relieve process pressure and drain the process media
from the upstream and downstream sides of the valve. Check
that bypass valves are used or the process has been completely
shut down.
Bonnet Removal
1Loosen the packing nuts (Key 12) until the packing follower
(Key 8) is loose. Loosen the bonnet nuts (Key 25) one turn
after contact with the bonnet is broken. The bonnet may
need to be rocked loose or loosened from the body by
prying at the bonnet-to-body joint (refer to Figure 5).
Take care not to damage the gasket-sealing surface when
separating the bonnet. If no process medium leaks from
the bonnet-to-body joint removal of the bonnet nuts
(Key 25) can proceed.
2When removing the bonnet (Key 1) ensure that the stem /
plug assembly (Key 19) does not drop out of the bonnet.
This could damage the plug seating surface.
3A razor or a pick-set can be used to remove old gaskets.
Inspect the gasket-sealing surface for scratches or dents
that may cause the gasket to leak.
NOTE: Spiral wound gaskets (Key 23) make their seal by being
crushed. Spiral wound gaskets cannot be reused.
4Inspect threads on bonnet studs (Key 24) and on packing
studs (Key 11) for any damage.
Trim Parts Removal (Plug / Seat / Cage)
Refer to Figures 8 to 11 for Key numbers.
NOTE: For instructions on Anti-Cavitation and Low-Noise trim
contact the Dyna-Flo Sales Office.
1 Seal ring (spring-loaded):
To remove the seal ring (Key 29), first pry the retaining
ring (Key 27) out of the groove, then remove the metal
backup ring (Key 28). Finally remove the seal ring from the
plug.
Piston ring:
Piston rings (Key 30) were broken in half, simply pull
apart the sections of piston ring and remove.
2Inspect the valve stem (Key 17) for any deep scratching or
corrosion also inspect the threads for any damage. Minor
scratching or corrosion is acceptable. A minor scratch can
be defined as a scratch that will not stop your fingernail
when you run it across the scratch. Anything other then a
minor scratch will need to be sent to the factory to be
refurbished back to the 4 μin finish.
3Inspect the seating area on the plug (Key 16). Some minor
scratching or corrosion can be lapped out of the plug. The
plug can be machined and lapped to remove damage
caused by normal wear, corrosion or erosion. Care must be
taken not to machine the seat surface back to far as this
will effect the position of the seal ring in the cage and may
cause failure.
4Inspect the seal ring sealing surface on the plug for any
scratching.
5Carefully lift the cage (Key 18) out of the valve body by
installing eyebolts into the 1/2” 13-UNC threaded holes
in the top of the cage. Remove the gaskets (Key 22)
from the top and bottom of the cage. Inspect the inside
diameter of the cage for signs of erosion, corrosion, or
deep scratching. Cages can be polished, but any deep
scratching or corrosion is cause for replacement.
6Remove all seat ring cap screws (Key 21A) and once
removed install eyebolts into the two 9/16 inch 12-UNC
threaded holes (they will be larger than the other cap
screw holes and directly across from each other on the
seat ring). Using the eyebolts, carefully lift the seat ring
out of the valve body.
Figure 5 Body/bonnet being separated with a chisel

Dyna-Flo Control Valve Services Ltd.
Phone: 780 •469 •4000 Toll Free: 1 •866 •396 •2356 Fax: 780 •469 •4035 Website: www.dynaflo.com
Model 380 Control Valve (8 Inch Only)
P-388M0319A 8
Operation, Parts, and Instruction Manual
VALVE DISASSEMBLY (Continued)
Packing and Packing Parts Removal
CAUTION: Concentrated gases could be trapped in the
packing! For live loaded packing removal instructions refer
to the P-LLPS manual.
1 Remove all packing parts (Keys 2 through 9, & 14) from
the packing bore. Use a rounded tool to remove the
packing set (Keys 2, 3 & 4) from the packing bore. Clean
all metal parts; if they are not damaged they can be
reused.
2Inspect the packing bore for any scratching or corrosion;
minor scratching or pitting in the packing bore can be
polished out.
Body Gasket Removal
1A razor or a pick-set can be used to remove old seat ring
gaskets (Key 23) or o-rings (Key 31).
CAUTION: Care must be taken to avoid damaging these
surfaces.
NOTE: Spiral wound gaskets (Key 23) make their seal by being
crushed. Spiral wound gaskets cannot be reused.
2 Inspect all gasket surfaces for damage.
3Inspect the internal body surfaces for any signs of
corrosion, erosion or irregular wear.
ASSEMBLY
Ensure that all parts have been cleaned and inspected as
per disassembly section.
NOTE: For instructions on Anti-Cavitation and Low-Noise
Trims contact the Dyna-Flo Sales Office.
NOTE: Use an anti-seize compound that is approved for the
service conditions that the valve is being installed into.
NOTE: Spiral wound gaskets (Keys 23) make their seal by
being crushed. Spiral wound gaskets cannot be reused.
1 For spiral wound seat ring gasket (Key 23):
Coat the seat ring gasket with nickel anti-seize compound
and insert it into the seat pocket in the body.
For seat ring o-ring (Key 31):
Lubricate the o-ring with the appropriate o-ring lubricant
and insert the o-ring into the o-ring groove on the under-
side of the seat ring (Key 21). Refer to Figure 13.
NOTE: To order the proper seat ring you will need to know the
Valve Serial Number. Old style seat rings will be used for valves
with Serial Numbers BEFORE P191270-01, new style seat rings
will be used for valves with Serial Numbers AFTER P191270-01.
For more information contact Dyna-Flo Control Valve Services.

Model 380 Control Valve (8 Inch Only)
Dyna-Flo Control Valve Services Ltd.
Phone: 780 •469 •4000 Toll Free: 1 •866 •396 •2356 Fax: 780 •469 •4035 Website: www.dynaflo.com
P-388M0319A 9
Operation, Parts, and Instruction Manual
ASSEMBLY (Continued)
Plug Seal Assembly
1 For one-piece seal ring:
A Refer to assembly diagram (Figure 9). Lubricate
plug seal diameter and install seal ring (Key 29) with
cup facing the correct direction as shown in Figure 9.
Install back up ring (Key 28) and retaining ring
(Key 27) as shown.
NOTE: The seal ring will need to be gently stretched over
the top edge of the plug. Use a constant force when
stretching the ring over the plug, failure to do so will cause
the ring to get damaged.
B Allow time for the PTFE material to shrink back to its
original size before installing the plug into the cage.
For piston rings (Key 30) (Model 381):
NOTE: Replacement piston rings (Key 29) come in one
piece. Before installation it is necessary to break the piston
ring into two pieces. Do not saw or cut piston rings. Use
extreme caution when breaking piston rings as they can be
easily damaged.
Vise break (Refer to Figures 6 & 7)
Piston rings can be broken into two pieces using a vise with
smooth jaws or softeners. Wrap electrical tape once around
the outside diameter of the piston ring to contain it while it
is being snapped in half. Place the unbroken piston ring
into the jaws of the vise so that they will compress the
ring into an oval. Slowly compress the piston ring until the
ring snaps on both sides. If one side of the ring snaps first,
simply keep compressing until the other side snaps.
Scoring
If no vise is present, wrap electrical tape once around the
outside diameter of the piston ring to contain it while it is
being snapped in half. Score (don’t cut) the piston ring and
snap it over a hard surface (such as the edge of a work
bench or table.
2Lubricate the valve plug / stem (Key 19) assembly with light
assembly grease and insert into the cage (Key 18).
NOTE: Ensure the seal ring (Key 29) does not shift out of
the plug groove when installing the plug into the cage.
Figure 6 Piston Ring Taping
Figure 7 Vise Break

Dyna-Flo Control Valve Services Ltd.
Phone: 780 •469 •4000 Toll Free: 1 •866 •396 •2356 Fax: 780 •469 •4035 Website: www.dynaflo.com
Model 380 Control Valve (8 Inch Only)
P-388M0319A 10
Operation, Parts, and Instruction Manual
1 Ensure all parts have been cleaned and inspected prior to
replacing packing. (See Disassembly section for inspection
procedures).
For single style (spring-loaded) packing:
A Coat the packing box ring (Key 13) and lower
wiper (Key 14) with silicone-based compound. Insert
both parts into the packing bore followed by spring
(Key 5) and special washer (Key 7).
BCoat the packing set (Key 2) with silicone-based
compound and insert on top of the washer (Key 7) in
the packing bore. It may be necessary to tap down
each soft packing part into the packing box so that
there is no air gap between parts, use a smooth-edged
pipe placed over the valve stem to accomplish this.
CPlace the packing follower (Key 8) on top of the
packing set followed by the upper wiper (felt) (Key 9)
and packing flange (Key 10).
DTighten the packing nuts (Key 12) until the packing
follower comes into contact with the bonnet (Key 1).
For double style packing:
A Coat packing box ring (Key 13), lower wiper
(Key 14) and lower packing set (Key 2) with
silicone-based compound. Insert these parts into the
packing bore followed by the lantern ring (Key 6).
BCoat the upper packing set (Key 2) with silicone-based
compound and place it into the packing bore followed
by the packing follower (Key 8).
CInsert the upper wiper (felt) (Key 9) and the packing
flange (Key 10) over the stem (Key 17) and tighten
the packing nuts (Key 12) to the proper torque value
as specified in Table 5.
For single style graphite packing:
A Refer to Figure 8 for single and double packing
arrangements. Choose proper arrangement based on
stem size and single or double configurations. Install
bonnet as described in the Assembly section. Install
packing box ring and packing arrangement as shown.
Note that Key 4 is graphite filament wound material
that typically looks like rope. Key 3 is graphite ribbon
compressed into rings and not split as the graphite
filament ring is. Install packing follower (Key 8) and
flange (Key 10) and torque as per Table 5.
CAUTION: Graphite ribbon packing damages easily, care is to
be taken when installing it into the packing bore.
ASSEMBLY (Continued)
Trim Parts Assembly
1Install two eyebolts or two similar threaded lifting devices
into the 9/16” 12-UNC holes (the two larger holes) on the
seat ring (Key 21). Carefully lower the seat ring onto the
seat ring gasket (Key 23) inside the valve body (Key 15).
2See Table 4 for the appropriate lubricant and torque values
for installing the seat ring cap screws (Key 21A). Lubricate
the threads of the cap screws and thread them into the
seat ring. Begin by torquing the seat ring cap screws in an
alternating crisscross pattern to 15 lbf-ft (20 N•m).
Continue tightening the cap screws in increments of 15
lbf-ft (20 N•m) in the appropriate pattern until the
recommended torque listed in Table 4 is achieved (Do Not
Exceed the recommended torque). Repeat the tightening
process a final time, and if there are any cap screws that
are able to turn, repeat the tightening process.
3Lubricate the cage gasket (Key 22) and gasket seating
surface of the valve body with nickel based anti-seize
compound and place the gasket onto the lip of the valve
body.
4Install two eyebolts (or similar threaded lifting device) into
the ½” 13-UNC threaded holes located on top of the cage
(Key 18). Carefully lower the cage onto the seat ring
(Key 21) inside the valve body (Key 15). Remove the lifting
devices.
5Lubricate the bonnet gasket (Key 22) and gasket seating
surface of the cage with nickel based anti-seize compound
and place the gasket on top of the cage.
Bonnet Assembly
1Place bonnet (Key 1) over stem (Key 17) and onto the valve
body. Install a washer (Key 26) over each bonnet stud (Key
24). Lubricate the bonnet studs with nickel based
anti-seize compound and thread the bonnet nuts (Key 25)
onto the studs. Tighten bonnet nuts to specified torque
values. Follow standard torque sequence when tightening
bolts. Refer to Table 2 for specific torque values.
Packing Assembly
Refer to Figure 8 for packing orientation and Key
numbers for the following section. For live loaded
packing instructions refer to the P-LLPS manual.