Emerson C471 User manual

Types C471, C477 and C486
Instruction Manual
D450229T012
February 2019
!
WARNING
P1197
Types C471, C477 and C486 Internal Valves
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion
and/or re causing property damage and
personal injury or death.
Fisher™ equipment must be installed,
operated and maintained in accordance
with federal, state and local codes
and Emerson Process Management
Regulator Technologies, Inc. (Emerson)
instructions. The installation in most
states must also comply with NFPA
No. 58 and ANSI Standard K61.1.
Only personnel trained in the proper
procedures, codes, standards and
regulations of the LP-Gas industry
should install and service this equipment.
The internal valve must be closed except
during product transfer. A line break
downstream of a pump may not actuate
the excess ow valve. If any break
occurs in the system or if the excess
ow valve closes, the system should be
shut down immediately.
Introduction
Scope of the Manual
This manual covers instructions for the Types C471,
C477 and C486 internal valves.
Description
The valves are typically used on the inlets and
outlets of bobtail and transport trucks and on large
stationary storage tanks. They can also be installed
in-line. Designed for propane, butane or Anhydrous
Ammonia (NH3) at ambient temperatures, the valves
Figure 1. C471, C477 and C486 Series Internal Valves
can be used on other compressed gases, but the user
should check with the factory to make sure the valves
are suitable for the particular service.
DOT Internal Self-Closing Stop Valve Requirement–
U.S. Department of Transportation (DOT) regulations
49CFR§178.337-8(a)(4) require each liquid or
vapor discharge outlet on cargo tanks (except for
cargo tanks used to transport chlorine, carbon
dioxide, refrigerated liquid and certain cargo
tanks certied prior to January 1, 1995) to be tted
with an internal self-closing stop valve. Fisher
“C” Series internal valves comply with the internal
self-closing stop valve requirement under the
DOT regulations.
TYPE C471
TYPE C477
TYPE C486

Types C471, C477 and C486
2
When tank and downstream pressure are nearly equal
after a few seconds, the excess ow spring pushes
open the main poppet (view #3) and the operating
lever can be moved to the full open position.
If tank pressure is greater than the valve’s outlet
pressure, the main poppet will remain in the closed
position. If valve outlet piping is closed off by other
valves, however, product bleeding through the pilot will
increase until it nearly equals tank pressure and the
main poppet opens.
Kalrez®is a mark owned by E.I. du Pont de Nemours and Co.
1. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.
2. Product has passed Fisher™ testing for leakage down to -40ºF / -40ºC.
Specications
The Specications section on the following page shows specications for Types C471, C477 and C486
internal valves.
Body Size and End Connection Styles
Types C471 and C477
Inlet: 2 or 3 in. MNPT / DN 50 or 80
Outlet: 2 or 3 in. FNPT / DN 50 or 80
Type C486
Inlet: 3 in. CL300 RF Flange / DN 80
Outlet: 3 in. FNPT / DN 80
Number of Outlets
Type C471: 2 (side and straight through)
Types C477 and C486: 1 (straight through)
Excess Flow Springs
Type C470 Half Coupling and Type C486 Flows:
2 in. / DN 50 Sizes: 105, 150 and 250 GPM /
397, 567 and 946 L/min
3 in. / DN 80 Sizes: 160, 265, 375 and 460 GPM /
605, 1003, 1419 and 1741 L/min
Type C470 Full Coupling Flows:
2 in. / DN 50 Sizes: 60, 80 and 130 GPM /
227, 302 and 492 L/min
3 in. / DN 80 Sizes: 120, 230, 320 and 380 GPM /
454, 870, 1211 and 1438 L/min
Maximum Allowable Inlet Pressure(1)
400 psig / 27.6 bar WOG
Temperature Capabilities(1)(2)
-20 to 150°F / -29 to 66°C
Approximate Weights
2 In. / DN 50 Sizes:
Type C471: 11 lbs / 5.0 kg
Type C477: 9 lbs / 4.1 kg
3 In. / DN 80 Sizes:
Type C471: 21 lbs / 10 kg
Type C477: 16 lbs / 7.3 kg
Type C486: 20 lbs / 9.1 kg
Construction Materials
Ductile Iron: Body (Types C471 and C477)
Stainless steel: Stem Assembly, Excess Flow
Spring, Spring Seat, Closing Spring, Disc Holder,
Disc Retainer, Screw, O-ring Seat, O-ring Retainer,
Cotter Pin, Spring, Shaft, Screen, Travel Stop,
Screen Cap, Bolt, Gasket and Lock Washer
Steel: Body (Type C486), Cap Screw and
Operating Lever
Plated steel: Nut, Washer, Bonnet Nut, Guide
Bracket and Cap Screw
Polyurethane (PU): Rod Wiper
Polytetrauoroethylene (PTFE): Bushing,
Packing Adaptor and Packing Ring
Nitrile (NBR) (Standard Construction):
Main Disc, Bleed Disc and O-ring
Other Disc Material Available from
Factory: Polytetrauoroethylene (PTFE),
Fluorocarbon (FKM), Neoprene (CR),
Ethylene-Propylene (EPDM) and Kalrez®
Principle of Operation
Refer to the schematic drawing, Figure 2. In view #1,
the valve is held closed by both tank pressure and the
valve’s closing spring. There is no leakage past the
resilient seats in the poppet to the valve outlet.
The valve is opened by moving the operating lever to
approximately mid-point in its 70° travel (view #2). This
allows the cam to place the rapid equalization portion
of the valve stem in the pilot opening, permitting
a larger amount of product to bleed downstream
than if the operating lever were moved to the full
open position.

Types C471, C477 and C486
3
Note
The main poppet will not open if valve
outlet piping is not closed off so that
the outlet pressure can approach
tank pressure.
Once the main poppet opens, a ow greater than
the valve’s excess ow spring rating or a sufcient
surge in ow forces the main poppet closed against
the excess ow spring (view #4). The pilot valve allows
a small amount of product to bleed, but much less
than view #2 where the rapid equalization portion of
the stem is placed in the pilot opening. When the
operating lever is moved to the closed position, the
valve closes completely and seals tightly (view #1).
Installation
Mounting and Piping
The internal valves can be installed in either a half
or full coupling. Excess ow spring closing ow
rates vary in half and full couplings, refer to the
Specication section.
CAUTION
Excess ow valve closing ow rates are
not the same for half and full couplings.
Verify the coupling for the desired
excess ow rate.
Do not install the valve in any piping
tending to restrict the valve inlet
because this may prevent the excess
ow valve from closing.
Do not install the valve with such
extreme torque that the coupling can cut
threads into the valve. This could cause
valve distortion and affect the internal
working parts.
Do not use PTFE tape as it may cause
thread galling to occur.
Figure 2. Operational Schematic
M1170
VALVE CLOSED JET BLEED OPEN VALVE OPEN EXCESS FLOW
VALVE CLOSED
123 4
JET
BLEED
JET
BLEED
FLOW LIMITED
BLEED
LIMITED
BLEED
FLOW
LIMITED BLEED
VALVE OPEN FLOW
JET BLEED EQUALIZATION

Types C471, C477 and C486
4
For NPT connections, use an appropriate pipe
compound, on the male threads of the internal valve
and pipeline. Pull the valve into the coupling hand
tight and then wrench tighten it for approximately
two additional turns. Larger size valves may
require an additional amount of torque to obtain a
leak-free connection.
Keep piping from the valve outlet to the pump full
size and as short as possible with a minimum number
of bends. Reduction in pipe size to suit smaller
pump inlets should be made as close to the pump
as possible using forged reducers (swage nipples)
or venturi tapers rather than bushings. This assures
minimum ow resistance and efcient pump operation.
The valves have a break off section below the inlet
pipe thread which is intended to permit the lower valve
body to shear off in an accident, leaving the valve
seat in the tank. The break off section is designed
for container installations and will probably not
provide shear protection if the valve is installed in
a pipeline.
A hydrostatic relief valve does not need to be installed
adjacent to the valve since the internal valve relieves
excessive line pressure into the tank.
MODIFIED
CL300 ASME RF
FLANGE
DIMENSION, IN. / mm MATING
FLANGE O.D.,
IN. / mm
AB
RF
C
RF DE (Modied)(1)
DBC No. Size
3 in. / DN 80 6.62 8 0.75 5.75 / 146 0.06 / 1.5 1.50 / 38 4.62 / 117 8.25 / 210
1. Can be increased up to 4.81 in. / 122 mm for 3 in. valve, if valve and gasket are centered with modied ange opening.
Table 1. Tank Connections
Figure 3. Tank Flange Dimensions
O.D. AND THICKNESS TO SUIT
CONTAINER SPECIFICATIONS
C
E
B
A
1 / 25
MINIMUM
45°
3/4-IO UNC
IN. / mm
D MAX
T10489
Figure 4. Valve Installation Schematic
3 IN. ASME CL300 RF FLANGE MODIFIED
(BORE 4-5/8 IN. / 117 mm DIAMETER
AND 5-3/4 IN. / 146 mm RF)
TANK
PUMP OR
PIPING 3 IN. FNPT

Types C471, C477 and C486
5
Type C486 Flange Installation
Lightly coat both sides of a spiral-wound, or other
suitable, ange gasket with silicone grease or
equivalent. An NPS 3 / DN 80, CL300 ASME RF ange
with a modied bore (see Figure 3) must be installed in
the tank. Special stud bolts, furnished with the valve,
are assembled into this ange. The internal valve
and ange gasket can then be installed as shown in
Figure 4 with good ange bolting practices.
Selectively Filling Manifolded Tanks
Fisher™ internal valves provide positive shutoff only
in one direction, from out of the tank to downstream
of the valve. The internal valves are designed to
allow gas to ow into a tank when the downstream
line pressure exceeds tank pressure. If you want to
selectively ll one or more of the other tanks in a tank
manifold system, you must place a positive shutoff
valve downstream of the internal valve, otherwise, all
tanks will be lled at the same time and at about the
same rate.
Actuators
The remote operating control system for the valve is
extremely important and it must be installed to conform
with the applicable codes. DOT MC331, for example,
most generally applies for trucks.
Fisher offers both cable controls and pneumatic
actuator systems to operate the C470 and C486 Series
internal valves. It may also be possible to use cable
controls from other manufacturers or to fabricate a
linkage mechanism.
Any control system requires thermal protection (fuse
links) at the valve, at the remote control point and, if
necessary, near the hose connections. The Instruction
Manuals for Emerson actuator systems show how to
install the fuse links.
Installation instructions on Fisher Types P650,
P163A and P164A cable controls, are in Document
D450012T012. Pneumatic actuator installation is
covered in Document D450162T012. Type P340
latch/remote release instructions are on
Document D450123T012.
The operating linkage must allow the operating lever
to move from the fully closed position to within 2° of
the fully open position. The linkage should not apply
strong force to the lever past the fully open position or
the valve could be damaged.
Warranty Note
The use of non-Fisher actuators will void
internal valve warranty and may result in
leakage of the gland packing caused by
premature wear. In addition to premature
wear, the use of non-Fisher actuators
may result in lower than expected ow
rates and possible leakage across the
valve seats.
CAUTION
The internal valve’s closing spring is
not designed to overcome drag in the
control linkage in order to close the
valve. Depending upon the control
system used, an external spring (such
as Fisher drawing number 1K4434) or
positive closing linkage may be needed.
Be sure the control system is installed
to prevent binding that could cause the
valve to stick in the open position.
Excess Flow Operation
The internal valve contains an excess ow function or
“integral excess ow valve”, that will close when the
ow exceeds the ow rating established by Fisher.
Fisher integral excess ow valve installed on a bobtail
truck or transport can provide protection against the
discharge of hazardous materials during an unloading
operation of a bobtail truck or transport in the event
that a pump or piping attached directly to the internal
valve is sheared off before the rst valve, pump or
tting downstream of the internal valve, provided that
the cargo tank pressure produces a ow rate greater
than the valve’s excess ow rating.
Likewise, if the internal valve is installed on a
stationary tank or in the related downstream piping
system, the integral excess ow valve can provide
protection against an unintentional release of
hazardous materials in the event that a pump or piping
attached directly to the internal valve is sheared off
before the rst valve, pump or tting downstream of
the internal valve, provided that the ow of product
through the internal valve reaches the rated ow
specied by Fisher.

Types C471, C477 and C486
6
EXPLOSION HAZARD
!
Restrictions incorporated in the
discharge system of a bobtail truck
or transport or of a stationary tank
(due to pumps, pipe and hose length
and dimensions, branching, elbows,
reductions in pipe diameter or a number
of other in-line valves or ttings),
low operating pressure as a result
of ambient temperature or a partially
closed valve downstream from the
integral excess ow valve, can restrict
the rate of ow through the internal
valve below the level necessary to
actuate the integral excess ow valve.
Therefore, DO NOT USE the excess ow
function of the internal valve for the
purpose of providing protection against
the discharge of hazardous materials
in the event of a rupture of hose or
piping at a point in the discharge
system downstream from the rst valve,
pump or tting downstream of the
internal valve.
The internal valve is designed with an
internal bleed feature for equalization of
pressure. After the integral excess ow
valve closes, the leakage through the
bleed must be controlled or a hazard can
be created. For this reason the operator
must be familiar with the closure
controls for the internal valve and must
close the internal valve immediately after
the integral excess ow valve closes.
Failure to follow this warning could result
in serious personal injury or property
damage from a re or explosion.
DOT Passive Shutdown Equipment Requirement—
DOT regulations 49CFR§173.315(n)(2) require certain
cargo tanks transporting propane, anhydrous ammonia
and other liqueed compressed gases to be equipped
with passive emergency discharge control equipment
that will automatically shutoff the ow of product
without human intervention within 20 seconds of an
unintentional release caused by complete separation of
a delivery hose. The design for each passive shutdown
system must be certied by a Design Certifying Engineer
(DCE) and all components of the discharge system that
are integral to the design must be included in the DCE
certication. The DCE certication must consider any
specications of the original component manufacturer.
In the case of downstream ruptures in hose or piping,
a variety of operating conditions routinely encountered
during an unloading operation restrict the rate of ow
through the integral excess ow valve and make such
a valve unsuitable to serve as the means of passive
shutdown required under 49CFR§173.315(n)(2).
Such variables include restrictions incorporated
in the discharge system (due to pumps, pipe and
hose length and dimensions, branching, elbows,
reductions in pipe diameter or a number of other
in-line valves or ttings), low operating pressure as
a result of ambient temperature or a partially closed
valve downstream from the excess ow valve. Due
to the variety of conditions, in the case of a hose
separation, that can restrict the rate of ow below the
level necessary to activate the excess ow valve, the
integral excess ow function of Fisher™ “C” Series
internal valves or “F” Series excess ow valves cannot
be used to satisfy the passive shutdown equipment
requirement under/in 49CFR§173.315(n)(2). Also, a
Design Certifying Engineer cannot include the integral
excess ow valve of a Fisher “C” Series internal valve
or “F” Series excess ow valve as a component of
the discharge system in any DCE certication under
49CFR§173.315(n)(2).
EXPLOSION HAZARD
!
DO NOT USE the excess ow function
incorporated into Fisher “C” Series
internal valves or “F” Series excess
ow valves to satisfy the passive
shutdown equipment requirement
in 49CFR§173.315(n)(2). DO NOT
include the excess ow function
incorporated into Fisher “C” Series
internal valves or “F” Series excess
ow valves in a DCE certication
under 49CFR§173.315(n)(2). The cargo
tank manufacturer must install some
other equipment that satises the
requirement for passive shutdown
capability under 49CFR§173.315(n)(2).
Failure to follow this warning
could result in serious personal
injury or property damage from a
re or explosion in the event of an
unintentional release of product during
an unloading operation.

Types C471, C477 and C486
7
Operation
Since the C470 and C486 Series will not open
unless the downstream pressure can build-up to
equal the inlet pressure, an operating sequence
that assures equalization is important.
Follow these points:
1. C470 and C486 Series on bobtails and transports
should never be open when the truck is in motion. If
the control system is not interlocked to prevent this,
the operator is responsible to see that the valves
are closed.
2. Always open the internal valve before opening any
other valves in the line or starting the pump.
3. Move the lever to the half-open position (Operational
Schematic, view #2) to equalize pressure. When the
main poppet clicks open, move the operating lever
fully open.
4. Open other line valves slowly to avoid sudden
surges which could slug the excess flow
valve shut.
5. If the excess flow valve does close, stop the
pump and close the nearest downstream
valve. Move the internal valve’s operating lever
back to the rapid equalizing position and wait
for the valve to click open. Then move the
operating lever fully open and slowly open the
downstream valve.
6. All valves should be completely open when
pumping. (Throttling type valves could
prevent the excess flow valve from closing
when required.)
7. The operator must always be aware of where
the remote closure controls are located
and know how to operate the controls if an
emergency requires valve closure. When
pumping is finished, make a habit of closing the
internal valve from the remote closure point,
thus checking to see that the control actually is
capable of closing the valve.
8. The valve should be open when backfilling
through the valve to fill the tank.
Troubleshooting
Internal Valve Will Not Open—This could be due
to leakage downstream, engaging the pump too
soon or from excessive wear in the internal valve.
If excessive volume is in the downstream system, a
longer time is required to equalize the pressures (tank
and downstream) before the pump can be engaged.
To determine if the valve pilot seat is opening, install
a gauge downstream of the valve, operate the valve
actuator; if pressure does not build up to the tank
pressure, the valve pilot seat is not open. This test
should be done with pump off. If the pilot is not
opening, it may be plugged with dirt or some internal
part may be broken. If by operating the lever manually
it can be rotated past the fully open position, there
is something wrong internally and the valve must
be disassembled.
Premature Valve Closure—This can be caused from
engaging the pump too soon, by an underrated excess
ow valve spring or by an improperly connected
internal valve operating lever which does not fully open
the valve. The trouble could also be from a valve that
has its inlet port obstructed or from sudden line surges.
In order to check the valve opening travel, operate the
lever manually to the full travel, wait until valve opens,
then engage the pump. If the excess ow closes, the
points mentioned above should be investigated.
Internal Valve Will Not Close—The stub shaft
could be binding or the stem could be bent in the
valve. Before disassembling the valve, check the
actuator mechanism to see that it operates freely
by disconnecting it from the valve lever and cycling it
several times. Also, operate the valve lever manually. If
it sticks in the open position, the packing and bushings
should be replaced. This should free the operating
mechanism if the valve has not been damaged
internally. Refer to the “Maintenance” section.
Low Flow Capacity—This could be caused by too
small an internal valve, too small or long downstream
piping, plugged screens, some other restriction in the
downstream system or by the bypass valve sticking in
the open position. The bypass valve could also be set
too low and be opening prematurely.

Types C471, C477 and C486
8
Figure 5. Use Tool Provided or Spring Seat (key 4) and Stem
Assembly (key 2) to Align Disc Retainer (key 8)
Maintenance
CAUTION
Do not use these internal valves if they
leak, fail to work properly or have been
damaged or have missing parts. Prompt
repairs should be made by a properly
trained service person. Continued use
without repair can create a hazardous or
injurious situation.
A simple preventative maintenance program for
the valve and its controls will eliminate a lot of
potential problems.
Fisher™ recommends these steps be conducted
once a month. Also refer to the Department of
Transportation (DOT) CFR 49 Sections 180.416
and 180 Appendix A and B which specify
monthly maintenance and inspections tests
for cargo tank service internal valves and their
actuation controls.
1. Inspect the operating lever to see that it operates
freely and that there is no leakage around the
retainer nut. If there is sticking or leakage,
replace the packing and bushings. Refer to
Replacing Packing.
2. Check for tight closure of the seat discs. Any
detected leakage, which is normally caused by
disc wear or dirt, scale or debris embedded in the
disc, requires that the internal valve be removed
from service and repaired. Repair most often
requires the replacement of valve discs. To check
for leakage:
a. Close the internal valve and exhaust
downstream pressure. Close the rst valve
downstream from the internal valve and note
any pressure buildup, using a pressure gauge,
between the closed valve and the internal
valve. If piping is cold allow it to warm to
ambient temperature.
b. Refer to CFR 49 Section 180 Appendix B for
Meter Creep Test Methods.
3. All operating controls should be inspected and
cleaned and oiled. The controls should be checked
to see that they fully open—but not over-travel—
the internal valve operating lever and operate
freely to close the valve.
4. Standard construction internal valves must
be removed if the container is to be steam
cleaned. Heat can damage the valve’s seats
and seals.
5. Standard construction internal valves are not
designed for water service. Immediately after
a container is hydrostatically tested, remove
all water and allow the container to thoroughly
dry out.
Disassembly
!
WARNING
Tank pressure must be released
before removing the valve from the
container. Failure to do so could result in
personal injury.
Numbers in parenthesis refer to key numbers in
Figures 5 to 9.

Types C471, C477 and C486
9
T11546
T11547
T11549 MULTI-PURPOSE PTFE LUBRICANT
T11550 MULTI-PURPOSE PTFE LUBRICANT
T11551
T11552
T20431
B
T20431
T11553
T11548
T11548
SECTION A-A
(WITHOUT LEVER)
T20380
1C2256
1B8480
T11555
T11545
1H9416 MULTI-PURPOSE PTFE LUBRICANT
A
A
CAM PROFILE UP
BACK VIEW WITHOUT
BOLT AND WASHER
Figure 6. Stub Shaft Orientation
58
59
55
17
55
SCREW-TYPE HARDWARE STUD-TYPE HARDWARE
*45°
HOLE B
ORIENTATION
NE TO SW
GLAND WING
GLAND WING
T11559
LEVER
CAM PROFILE
POINTED LEFT
* DRILLED PIN HOLE MUST
BE 45° TO CL OF CAM
C
TORQUE: 90 TO 100 IN-LBS /
10 TO 11 N•m TORQUE: 90 TO 100 IN-LBS /
10 TO 11 N•m

Types C471, C477 and C486
10
To Replace Packing or Install
Gland Hardware
!
WARNING
Downstream pressure must be released
before removing the screws holding
the gland assembly to the internal valve
body. Failure to do so could result in
personal injury.
1. The packing (keys 15F, G and H) can be replaced
with product in the tank by closing the operating
lever (key 18) and blowing down the downstream
pressure in the system.
2. If using Screw-Type hardware, remove the three
cap screws (key 17) holding the bonnet assembly
to the body. If using the current Stud-Type
hardware, remove the nuts (key 59) and washers
(key 55) holding the bonnet assembly to the body.
Note
If working on a valve equipped with
a pneumatic actuator, please refer to
the corresponding actuator Instruction
Manual for proper removal procedures.
3. Rotate the entire bonnet assembly slightly to
remove it from the body.
4. Unscrew the cap screw (key 15R) from the stub
shaft (key 15J) and remove the operating lever by
taking out the cotter pin (key 19).
5. Unscrew the retaining nut (key 15M) from the
bonnet. Pushing on the stub shaft (key 15J)
will expose the bonnet parts including the packing.
6. Besides the packing, the liner bushings (keys 15B
and 15K) should be replaced. Lubricate the
packings with Multi-purpose PTFE lubricant.
7. Reassemble in reverse order. Replace cap
screw (key 15R) using 30 to 35 in-lbs / 3.4 to
4.0 N•m torque.
8. Before replacing the gland assembly, replace the
O-ring (key 16) with the proper material matching
the main seals. The standard Types C471 and
C477 material is Nitrile (NBR).
9. Orient Cam and stub shaft (See Figure 6)
Before reassembling the gland assembly into the
body, make sure the operating lever can move freely
with the new parts installed. Then, correctly orient the
cam to the stub shaft. Incorrect orientation will result
in either:
a. Not being able to open the internal valve or
b. Only being able to partially open the internal
valve which will cause the valve’s excess ow
feature to close prematurely
Refer to Figure 6. Looking at the end of the stub
shaft (C) that the lever or actuator attaches to:
a. The cam prole on the opposite end of the shaft
should be up and the cam pointing to the left.
b. The hole (B) through the stub shaft that the lever/
actuator attaches to should be oriented in a NE to
SW position with N being at the top.
c. The 2 gland wings should be at the top as shown
in Figure 6.
d. The lever should be oriented as shown and the
cotter pin run through hole (B).
10. Once proper orientation of the cam is conrmed:
a. Reinstall the washers (key 55) and nuts (key 59)
and torque to 90 to 100 in-lbs / 10 to 11 N•m.
Reinstall actuator or latch if applicable.
b. If reusing the cap screws, reinstall the actuator
or latch if applicable before installing the cap
screws and washers. Torque to 90 to 100 in-lbs /
10 to 11 N•m.
c. If installing new studs, install the long studs
(key 57) in the top-most hole locations and the
short stud (key 58) in the bottom-most location.
Secure the gland to the body with the rst set of
washers (key 12) and nuts. Reinstall actuator or
latch if applicable or cover two long studs with
protective cap (key 60) if available.
To Replace Seat Discs
1. Remove the valve from the tank.
2. Remove the cotter pin (key 14, Figure 7) and
unscrew the hex nut (key 13).
3. Remove both disc holders (keys 6 and 12) from
the stem (key 2).
4. Unscrew the screws (keys 9 and 4 for 2 in. /
DN 50, 6 for 3 in. / DN 80) holding the disc retainer
(key 8) to replace the main seat disc.
5. Examine both seat discs (keys 7 and 11) and
replace if necessary.
6. If the excess ow spring (key 3) is changed,
replace the nameplate or stamp the body with the
new type number.

Types C471, C477 and C486
11
† Recommended spare part for 2 in. / DN 50 body size.
* Recommended spare part for 3 in. / DN 80 body size.
Kalrez®is a mark owned by E.I. du Pont de Nemours and Co.
Parts List
Types C471, C477 and C486 Internal Valves
Key Description Part Number
Repair Kit
2 in. NPT / DN 50 RC47016T012
3 in. NPT / DN 80 RC47024T012
1 Body
Type C471, Ductile Iron
2 in. / DN 50 T40195T0012
3 in. / DN 80 T80119T0012
Type C477, Ductile Iron
2 in. / DN 50 T40132T0012
3 in. / DN 80 T80089T0012
Type C486
3 in. / DN 80 Flange by FNPT ERAA00979A0
2 Stem Assembly
†2 in. / DN 50, Steel/Stainless steel GE41520T012
*3 in. / DN 80, Steel GE41522T012
2A Stem
2 in. / DN 50, Steel/Stainless steel GE35309T012
3 in. / DN 80, Steel GE35311T012
2B Follower Assembly, Steel/Stainless steel T11880000A2
2C Groove Pin, Steel/Stainless steel IJ1560T0012
3 Excess Flow Spring, Stainless steel
2 in. / DN 50
105 GPM / 397 L/min, Green GE42498X012
150 GPM / 567 L/min, Yellow T1153537022
250 GPM / 946 L/min, Pink T1200537022
3 in. / DN 80
160 GPM / 605 L/min, Blue GE42499X012
265 GPM / 1003 L/min, Black GE42500X012
375 GPM / 1419 L/min, Yellow GE42851X012
460 GPM / 1741 L/min, Red GE42501X012
4 Spring Seat, Stainless steel
2 in. / DN 50 GE35317T012
3 in. / DN 80 GE35318T012
5 Closing Spring, Stainless steel T1153737022
6 Disc Holder, Stainless steel
2 in. / DN 50 GE35315T012
3 in. / DN 80 GE35316T012
7. Always replace the sealing washer (key 23), with a
new sealing washer and follow recommended torque
values for hex nut, (key 13).
8. a. Reassemble in reverse order. Tighten the screws
(key 9) using 20 in-lbs / 2.2 N•m torque to install
the disc retainer (key 8) properly.
CAUTION
Failure to properly center the disc
retainer to the disc holder may result in
improper function of the valve.
Important
During replacement of the seat disc, use
P/N GE45079X012 provided to center
the disc retainer to the disc holder
(See Figure 5). Line up holes and insert
screws. Keep the alignment tool inserted
until all of the screws are tightened
to specication.
Alternately, the stem assembly (key 2) and
spring seat (key 4) may be used as shown
in Figure 5 to perform this alignment. After
assembly, check to make sure there is no
interference of the spring seat and disc
retainer when the valve is in the excess
ow position.
b. Apply Medium-Strength Threadlocker on the
stem threads before installing the hex nut
(key 13).
Parts Ordering
Important
Use only genuine Fisher™ replacement
parts. Components that are not
supplied by Emerson should not,
under any circumstances, be used in
any Fisher valve, because they will
void your warranty, might adversely
affect the performance of the valve and
could give rise to personal injury and
property damage.
When corresponding about this equipment, always
reference the equipment type number found on
the nameplate.
When ordering replacement parts, reference
the complete 11-character part number for each
needed part.

Types C471, C477 and C486
12
† Recommended spare part for 2 in. / DN 50 body size.
* Recommended spare part for 3 in. / DN 80 body size.
Kalrez®is a mark owned by E.I. du Pont de Nemours and Co.
15J Stub Shaft
2 in. / DN 50, Stainless steel T2037835072
3 in. / DN 80, Stainless steel T2043135072
15K†* Liner Bushing, PTFE T1155106992
15L†* Rod Wiper, Polyurethane (PU) T1155206992
15M Bonnet Nut, Steel T1155324102
15P Cam
Steel T1155521992
Stainless steel T1220535072
15R Cap Screw
Steel 1B848024052
Stainless steel T12206T0022
15S Washer
Steel 1C225628982
Stainless steel T1220736152
16†* O-ring
Nitrile (NBR) T1155706562
PTFE T1214206522
Fluorocarbon (FKM) T12577T0012
Kalrez®T1214206522
Neoprene (CR) T1214206522
Ethylene Propylene (EPDM) T13477T0012
17 Cap screw, Steel (3 required) T12499T0012
18 Operating Lever, Steel T1155919312
19†* Cotter pin, Carbon-plated Steel (not shown) 1H837128982
20 Nameplate (not shown) - - - - - - - - - - -
21 Drive Screw,
Stainless steel (2 required) (not shown) 1A368228982
22 Pipe plug, Zinc (not shown) T13718T0012
23†* Washer
Steel T1188228982
Stainless steel T11882T0012
30 Fusible Link (not shown) 1J157443992
33 Travel stop, Stainless steel T1240838072
35†* Bushing, PTFE T1221306992
36 Guide, Iron
Type C471
2 in. / DN 50 T12918T0012
3 in. / DN 80 T12511T0012
Type C477
2 in. / DN 50 T12918T0022
3 in. / DN 80 T12511T0012
55 Lock washer, Stainless steel (3 required) 1C2257K0012
57 Stud, Long (2 required) ERAA02623A0
58 Stud, Short ERAA02652A0
59 Nut 1A309338992
60 Thread Cap (2 required) (not shown) ERAA02691A0
7 Main Disc
†2 in. / DN 50
Nitrile (NBR) T1154003202
PTFE T1214006242
Fluorocarbon (FKM) T12533T0012
Neoprene (CR) T12879T0012
Kalrez®T12877T0012
Ethylene Propylene (EPDM) T13474T0012
*3 in. / DN 80
Neoprene (CR) T12914T0012
Nitrile (NBR) T1177403032
PTFE T1217306242
Fluorocarbon (FKM) T12535T0012
Kalrez®T12921T0012
Ethylene Propylene (EPDM) T13476T0012
8 Disc Retainer
2 in. / DN 50, Steel/Stainless steel GE35313T012
3 in. / DN 80, Steel GE35314T012
9 Screw
2 in. / DN 50, Steel/Stainless steel (4 required) 13B3513X022
3 in. / DN 80, Steel (6 required) 13B3513X022
10 Bleed Disc seat, Steel/Stainless steel ERAA00325A0
11†* Bleed Disc
Nitrile (NBR) ERAA00328A0
PTFE ERAA00328A1
Fluorocarbon (FKM) ERAA00328A2
Kalrez®ERAA00328A3
Neoprene (CR) ERAA00328A4
Ethylene Propylene (EPDM) ERAA02202A0
12 Bleed Disc Retainer, Stainless steel ERAA00324A0
13†* Hex Nut, Plated steel GE04678T012
14†* Cotter Pin, Stainless steel T1241338992
15 Gland Assembly, Nitrile (NBR)
2 in. / DN 50 T20377000B2
3 in. / DN 80 T20430000B2
15A Gland
Steel T2038022012
Stainless steel T2052033092
15B†* Liner Bushing, PTFE T1154506992
15C†* Washer
Steel T1154625072
Stainless steel T1220236152
15D Spring, Stainless steel T1154737022
15E†* Washer (2 required)
Steel T1154825072
Stainless steel T1220336152
15F†* Male Packing Adaptor, PTFE T1154901012
15G†* Packing, PTFE (3 required) T1155001012
15H†* Female Packing Adaptor, PTFE 1H941601012
Key Description Part Number Key Description Part Number

Types C471, C477 and C486
13
Figure 7. Type C477 Assemblies
APPLY LUBRICANT(1)
L = MULTI-PURPOSE PTFE LUBRICANT
1. Lubricants must be selected such that they meet the temperature requirements.
SECTION A - A
STEM
SECTION B - B
GLAND
SECTION C
TORQUE:
50 TO 75 IN-LBS /
5.6 TO 8.5 N•m
TORQUE:
50 TO 75 IN-LBS /
5.6 TO 8.5 N•m
TORQUE:
90 TO 100 IN-LBS /
10 TO 11 N•m
L
L
L
L
L
A
B
C
B
A
1
14
57
55
59
60
19 57
55
59
60
6
36
4
3
33
5
2
13
34
35
9
8
7
18
59
55
58
10
23
12
11
16
15D
15C
15K
15B
15A
15J
15S
15R
15E
15P
22
15H
15L
15M
15E
15G
15F
13

Types C471, C477 and C486
14
Figure 8. Type C471 Assemblies
PARTS NOT SHOWN: 20 AND 21
APPLY LUBRICANT(1)
L = MULTI-PURPOSE PTFE LUBRICANT
1. Lubricants must be selected such that they meet the temperature requirements.
SECTION A - A
STEM
SECTION B - B
GLAND
SECTION C
TORQUE:
50 TO 75 IN-LBS /
5.6 TO 8.5 N•m
TORQUE:
50 TO 75 IN-LBS /
5.6 TO 8.5 N•m
TORQUE:
90 TO 100 IN-LBS /
10 TO 11 N•m
L
L
L
A
A
C
BB
L
L
114
60
59
55
57 19
60
59
55
57
6
5
2
36
4
3
34
35
9
8
7
18
59
55
58
23
12
11
10
13
13
33
15P
22
15S
15J
15A
15R
15B
15C
15D
16
15E
15K
15G
15H
15E
15M
15L
15F

Types C471, C477 and C486
15
Figure 9. Type C486 Assemblies
APPLY LUBRICANT(1)
L = MULTI-PURPOSE PTFE LUBRICANT
1. Lubricants must be selected such that they meet the temperature requirements.
PARTS NOT SHOWN: 20 AND 21
SECTION A - A
SEE DETAIL C
SECTION B - B SECTION C
TORQUE:
90 to 100 IN-LBS /
10 to 11 N•m
TORQUE:
90 TO 100 IN-LBS /
10 TO 11 N•m
TORQUE:
50 TO 75 IN-LBS /
5.6 TO 8.5 N•m
TORQUE:
50 TO 75 IN-LBS /
5.6 TO 8.5 N•m
L
A
A
B
B
L
L
15R
15C
15J
15S
15A
15B
15D
15E
16
10
11
23
12
59
55
58
18
4
8
7
36
9
3
6
13
13
19
55
57
59
2
5
33
34
35
1
14
22
15P
15L 15K
15M
15E
15H
15G
15F

Types C471, C477 and C486
Facebook.com/EmersonAutomationSolutions
LinkedIn.com/company/emerson-automation-solutions
Twitter.com/emr_automation
[email protected]
Fisher.com
Emerson Automation Solutions
Americas
McKinney, Texas 75070 USA
T [phone]
[phone]
Europe
Bologna 40013, Italy
T [phone]
Asia Pacic
Singapore 128461, Singapore
T [phone]
Middle East and Africa
Dubai, United Arab Emirates
T [phone]
D450229T012 © 2002, 2019 Emerson Process Management Regulator
Technologies, Inc. All rights reserved. 02/19.
The Emerson logo is a trademark and service mark of Emerson
Electric Co. All other marks are the property of their prospective owners.
Fisher™ is a mark owned by Fisher Controls International LLC, a
business of Emerson Automation Solutions.
The contents of this publication are presented for information purposes
only, and while effort has been made to ensure their accuracy, they are
not to be construed as warranties or guarantees, express or implied,
regarding the products or services described herein or their use or
applicability. All sales are governed by our terms and conditions, which
are available on request. We reserve the right to modify or improve the
designs or specications of our products at any time without notice.
Emerson Process Management Regulator Technologies, Inc does not
assume responsibility for the selection, use or maintenance of any
product. Responsibility for proper selection, use and maintenance of any
Emerson Process Management Regulator Technologies, Inc. product
remains solely with the purchaser.