IM-F12-31 CH Issue 2
1
'C' Series
Control Valves
Installation and Maintenance Instructions
IM-F12-31
CH Issue 2
3060050/2
Printed in the UK © Copyright 2003
1. Safety information
2. General product
information
3. Installation and
Commissioning
4. Maintenance
5. Spare parts
IM-F12-31 CH Issue 22
1. Safety information
1.1 General
Safe operation of the unit can only be guaranteed if it is properly installed,
commissioned and maintained by a qualified person in compliance with the operating
instructions. General installation and safety instructions for pipeline and plant
construction, as well as the proper use of tools and safety equipment must also be
complied with.
1.2 Isolation
Consider whether closing isolating valves will put any other part of the system or
personnel at risk. Dangers might include; isolation of vents, protective devices or
alarms. Ensure isolation valves are turned on and off in a gradual way to avoid system
shocks.
1.3 Pressure
Before attempting any maintenance of the valve consider what is or may have been in
the pipeline. Ensure that any pressure is isolated and safely vented, before attempting
to maintain the valve. Do not assume that the system or valve is depressurised even
when a pressure gauge indicates zero.
1.4 Temperature
Allow time for the temperature to normalise after isolation to avoid the danger of burns
and consider whether protective clothing (including safety glasses) is required.
1.5 Handling precautions
PTFE:-
Within its working temperature range PTFE is a completely inert material, but when
heated to its sintering temperature it gives rise to gaseous decomposition products or
fumes which can produce unpleasant effects if inhaled. The inhalation of these fumes
is easily prevented by applying local exhaust ventilation to atmosphere as near to their
source as possible.
Smoking should be prohibited in workshops where PTFE is handled because tobacco
contaminated with PTFE will during burning give rise to polymer fumes. It is therefore
important to avoid contamination of clothing, especially the pockets, with PTFE and to
maintain a reasonable standard or personal cleanliness by washing hands and
removing any PTFE particles lodged under the fingernails.
Laminated gaskets:-
The metal foil sheet used to reinforce gaskets is very thin and sharp. Care should be
taken when handling to avoid the possibility of cuts or lacerations to fingers or hands.
1.6 Disposal
The product is recyclable. No ecological hazard is anticipated with disposal of this
product providing due care is taken.
IM-F12-31 CH Issue 2
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2. General product information
2.1 Description
The 'C' series is a range of carbon steel (CE43), alloy steel (CE83) or stainless steel (CE63)
two port, cage trim, control valves conforming to ANSI B 16.34 and ASME VIII standards. The
valves are available in sizes 1" to 8" (DN25 to DN200), with ANSI and PN flange connections.
When used in conjunction with a pneumatic linear actuator the 'C' series valve will provide
characterised modulating or on/off control.
Note: For additional information see the relevant Technical Information Sheet.
Compatible actuators and positioners:
Pneumatic
PN1000 series, spring-to-close
actuators
PN2000 series, spring-to-open
PP5 (pneumatic)
Positioners EP5 (electropneumatic)
SP2 (smart electropneumatic)
Refer to the relevant Technical Information Sheet for further details.
2.2 Sizes and pipe connections
1", 1½", 2", 2½", 3", 4", 5", 6" and 8" (DN25, 40, 50, 65, 80,100,125, 150 and 200).
Flanged to ANSI 150, ANSI 300, ANSI 600 (Raised face or ring type joint) or
PN16, PN25, PN40, PN63, and PN100 (Raised face with ANSI face-to-face dimension).
1", 1½" and 2" socket weld.
2.3 Options
Trim
Equal %, linear, fast opening (on/off) characteristics, soft seat, hard faced, low
noise and anti-cavitation (single and multi-cage).
Stem seal PTFE chevron, graphite packing and bellows.
Plug Balanced or unbalanced to ANSI Class IV, V or VI shut-off.
See 'C' series valve options Technical Information Sheet TI-F12-23.
2.4 Technical data
Unbalanced plug
Plug design PTFE sealed balanced plug
Graphite sealed balanced plug
Trim design
Cage trim with equal percentage, linear and fast opening flow characteristic
options.
Class IV Metal-to-metal seat IEC 534-4
Leakage Class IV & V Hard face stellite IEC 534-4
Class VI PTFE soft seat IEC 534-4
CE valves Equal percentage
Flow CF va lves Fast opening
characteristic CL valves Linear
CM valves Modified equal percentage
Rangeability
50:1 Equal percentage
30:1 Linear
1" and 1½" (DN25 and 40) ¾" (20 mm)
2" (DN50) 13/16" (30 mm)
Travel 2½" and 3" (DN65 and 80) 1½" (38 mm)
4" (DN100) 2" (50 mm)
5" and 6" (DN125 and 150) 2½" (65 mm)
8" (DN200) 3" (75 mm)
IM-F12-31 CH Issue 24
2.5 Limiting conditions
Body
ANSI 300 and ANSI 600
design conditions
Standard PTFE
CE43 14°F to +482°F (-10°C to +250°C)
chevron stem seals
CE63 -20°F to +482°F (-29°C to +250°C)
CE83 14°F to +482°F (-10°C to +250°C)
Standard
CE43 14°F to +572°F (-10°C to +300°C)
bonnet
CE63 -20°F to +572°F (-29°C to +300°C)
Graphite packing CE83 14°F to +572°F (-10°C to +300°C)
Design stem seals
Extended
CE43 14°F to +797°F (-10°C to +425°C)
temperature
bonnet
CE63 -20°F to +1004°F (-29°C to +540°C)
CE83 14°F to +1004°F (-10°C to +540°C)
Graphite sealed
CE43 797°F (425°C)
balanced plug
Class IV CE63 1004°F (540°C)
CE83 1004°F (540°C)
PTFE sealed
Class VI 356°F (180°C)
balanced plug
CE43 1110 psi g (76.6 bar g)
ANSI 300 CE63 1080 psi g (74.5 bar g)
Designed for a maximum cold
CE83 1125 psi g (77.6 bar g)
hydraulic test pressure of:
CE43 2220 psi g (153.0 bar g)
ANSI 600 CE63 2160 psi g (149.0 bar g)
CE83 2250 psi g (155.0 bar g)
Maximum differential pressure See relevant actuator TI
The product must not be used in this region.
A-C PN16, A -D PN25, A-E PN40, A-F PN63, A-G PN100,
B-H ANSI 150, B-J ANSI 300, B-K ANSI 600
2.6 Operating range for body material and flange type only.
Note: See limiting conditions for stem and plug limitations.
CE43 Carbon steel
425
300
200
100
0
0
10
20
30
40
50
60
70
80
90
102
A
H
G
F
J
K
E
B
0
200
400
600
800
1 000
1 200
1 400
0
200
400
600
797
D
C
Pressure psi g
Temperature °F
Temperature °C
Pressure bar g
Steam
saturation
curve
IM-F12-31 CH Issue 2
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2.8 Valve flow coefficients at 100% lift
Cv (US) for single stage trims (K
vs
shown in brackets). FL = Flow recovery factor
Valve size
1" 1½" 2" 2½" 3" 4" 5" 6" 8"
DN25 DN40 DN50 DN65 DN80 DN100 DN125 DN150 DN200
Equal % Cv 19 35 63 95 130 216 293 385 560
(Kvs) (16) (30) (54) (81) (111) (185) (250) (330) (480)
F
L
0.94 0.94 0.94 0.94 0.90 0.89 0.85 0.85 0.85
Three reduced Cv are available for equal percentage and linear trims, for further details see:
TI-F12-23, 'C' series valve options.
For conversion Cv (UK) = Cv (US) x 0.833 Kvs = Cv (US) x 0.855
2.7 Weights (approximate) in lbs and (kg)
Valve size
1" 1½" 2" 2½" 3" 4" 5" 6" 8"
DN25 DN40 DN50 DN65 DN80 DN100 DN125 DN150 DN200
Weights
29 48 59 92 130 213 264 396 660
(13) (22) (27) (42) (59) (97) (120) (180) (300)
CE63 Stainless steel
CE83 Alloy steel
540
400
300
200
100
0
0
10
20
30
40
50
60
70
80
90
103
B
A
H
E
J
F
G
K
200
400
600
800
1 004
0
0
200 400
600
800 1 000
1 200
1 400
D
C
A
Pressure psi g
Temperature °F
Temperature °C
Pressure bar g
Steam
saturation
curve
The product must not be used in this region.
A-C PN16, A -D PN25, A-E PN40, A-F PN63, A-G PN100,
B-H ANSI 150, B-J ANSI 300, B-K ANSI 600
The product must not be used in this region.
A-C PN16, A-D PN25, A-E PN40, A-F PN63, A-G PN100,
B-H ANSI 150, B-J ANSI 300, B-K ANSI 600
Pressure psi g
0
200
400
600
800
1004
0
10
20
30
40
50
60
70
80
90
103
0
200
400
600
800
1000
1200
1400
0
100
200
300
Temperature °F
Temperature °C
Pressure bar g
B
D
E
J
F
Steam
saturation
curve
K
G
C
H
A
A
IM-F12-31 CH Issue 26
2.9 Part numbers, description and materials
No. Part Material
CE43 Carbon steel ASTM A216 WCB
1 Body CE63 Stainless steel ASTM A351 CF8M
CE83 Alloy steel ASTM A217 WC6
CE43 Carbon steel ASTM A216 WCB
2 Bonnet CE63 Stainless steel ASTM A351 CF8M
CE83 Alloy steel ASTM A217 WC6
3 Valve plug Stainless steel AISI 431 hardened
4 Valve cage Stainless steel AISI 316 ENC
5 Valve seat Stainless steel AISI 431
6 Valve stem Stainless steel AISI 316
7 Valve plug sealing rings PTFE and graphite or graphite
8 Lock-nut Stainless steel AISI 316
9 Mounting nut Zinc plated carbon steel
10 Gland spring Stainless steel AISI 302
11 Gland seal PTFE chevron or graphite
12 Bonnet gasket Reinforced exfoliated graphite
CE43 Carbon steel ASTM A193 B7
13 Bonnet studs CE63 Stainless steel ASTM A193 Gr. B8M
CE83 Alloy steel ASTM A193 B16
CE43 Carbon steel ASTM A194 2H
14 Bonnet nuts CE63 Stainless steel ASTM A194 Gr. 8M
CE83 Alloy steel ASTM A194 GRD4
CE43 Carbon steel ASTM A193 B7
15 Stuffing box studs CE63 Stainless steel ASTM A193 Gr. B8M
CE83 Alloy steel ASTM A193 B16
CE43 Carbon steel ASTM A194 2H
16 Stuffing box nuts CE63 Stainless steel ASTM A194 Gr. 8M
CE83 Alloy steel ASTM A194 GRD4
17 Stem scraper Glass filled PTFE
18 Stuffing box bush Stainless steel AISI 316
19 Stuffing box ring Stainless steel AISI 316
20 Valve stem wiper Fluoroelastomer
21 'O' ring Fluoroelastomer
IM-F12-31 CH Issue 2
7
8
15
16
19
18
9
11
6
10
13
14
17
2
1
5
12
4
3
7
20
21
Fig. 1
IM-F12-31 CH Issue 28
3. Installation and Commissioning
Note: Before actioning any installation, observe the 'Safety information' in Section 1.
3.1 General
The valve should be installed in such a position as to allow full access to the valve and actuator
for maintenance purposes. Prior to fitting the valve the pipework should be flushed clear to
remove any debris or other particles.
Remove the flange protectors and fit the valve into the pipeline taking notice of the direction of
flow arrow on the valve body.
Care should be taken to prevent any strain being imposed on the valve body due to pipe
misalignment. Tighten flange bolts evenly. Check flange bolts for tightness after 24 hours of
operation. Care should be taken to ensure that the valve / actuator spindle is not painted or coated
with any other substance.
When carrying out maintenance of the valve care should be taken to avoid damage to the valve
plug, stem and seat.
3.2 Bypass arrangements
It is recommended that isolating valves be fitted upstream and downstream of the control valve.
A bypass can be fitted around the valve with a manual regulating valve allowing the process to be
controlled whilst the control valve is isolated for maintenance.
3.3 Commissioning
For commissioning instruction refer to the Installation and Maintenance Instructions, covering
Spirax Sarco actuators.
IM-F12-31 CH Issue 2
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4. Maintenance
Note: Before actioning any maintenance, observe the 'Safety information' in Section 1.
4.1 General
Valve parts are subject to normal wear and must be inspected and replaced as necessary.
Inspection and maintenance frequency depends on the severity of service conditions. This Section
gives instructions for packing lubrication, packing maintenance, trim maintenance, and bellows
seal replacement. All maintenance operations can be performed with the valve body in the line.
4.2 Routine maintenance procedures
24 hours operation
After 24 hours service check pipework connections and flange bolts for tightness.
For valves which have high temperature graphite packed gland seals; the gland nut should be
tightened by approximately ¼ of a turn taking care not to overtighten as this may cause excessive
friction on the valve stem.
3 months operating intervals
After every 3 months normal service visually check gland seals for signs of leakage and if
necessary take the following corrective action.
Valves having chevron gland seals remove and replace the PTFE chevron seal (refer to
Section 4.3, page 10).
Valves having high temperature graphite packed gland seals tighten gland nut approximately
¼ of a turn taking care not to overtighten as this may cause excessive friction on the valve stem.
If no adjustment is remaining, replace the graphite gland seal (refer to Section 4.4, page 12).
Annually
The valve should be inspected for wear and tear replacing any worn or damaged parts such as
valve plug and stem, valve seat and gland seals. Refer to 'Spare parts' Section 5 for 'Available
spares'.
High temperature graphite packed gland seals are subject to wear during normal operation.
It is therefore recommended that the graphite packing is replaced during this routine inspection to
prevent premature failure of the gland seals during normal operation.
IM-F12-31 CH Issue 210
4.3 Procedure for renewing chevron gland seals
For spring-loaded single PTFE chevron gland seals, the gland spring (10) maintains a sealing
force on the packing. If leakage is noted around the stuffing box bush (18) check to be sure the
shoulder on the bush is touching the bonnet. If the shoulder is not touching the bonnet, tighten
the stuffing box nuts (16), until the shoulder is against the bonnet. If leakage cannot be stopped
in this manner, the gland seals will need replacing.
If the leakage comes from the outside diameter of the seals, it is possible that the leakage is
caused by damage to the stuffing box wall. If performing any of the following procedures, inspect
the valve stem and packing box wall for damage.
4.3.1 Replacing chevron gland seals:
1. Isolate the control valve from the pressure, and release pressure from the valve body.
2. Disconnect the operating lines from the actuator and any leak-off piping from the bonnet.
Disconnect the valve stem (6) from the actuator and then remove the actuator from the valve
by unscrewing the mounting nut (9).
3. Loosen the stuffing box nuts (16) so that the seals are not tight on the valve stem. Remove the
stem lock-nut (8) from the valve stem.
Caution:
When lifting the bonnet (2), be sure that the valve plug and stem assembly remains in the
valve and on the seat. This will avoid damage to the seating surfaces as a result of the
assembly dropping from the bonnet after being lifted part way out. The parts are also easier
to handle separately.
4. Unscrew the bonnet nuts (14) and carefully lift the bonnet off the valve stem.
5. If the valve plug and stem assembly starts to lift with the bonnet, use a brass or lead hammer
on the end of the stem and tap it back down. Put the bonnet onto a protective surface to prevent
any damage to the bonnet gasket surface.
6. Cover the opening in the valve body to protect the gasket surface and prevent foreign material
from getting into the body cavity.
7. Remove the stuffing box nuts (16), stuffing box ring (19), and stuffing box bush (18). Carefully
push out all the remaining packing parts from the body side of the bonnet using a rounded rod or
other tool that will not scratch the stuffing box wall. Clean the stuffing box and metal packing parts.
8. Inspect the valve stem threads and stuffing box surface for any sharp edges which might cut
the packing. Scratches or burrs could cause damage to the new packing. If the surface
condition cannot be improved by rolling with light emery paper, replace the damaged parts.
9. Remove the cover protecting the body cavity and install a new bonnet gasket set (F1, F2 and
F3), making sure that the gasket seating surfaces are clean and smooth. Then slide the bonnet
over the stem and onto the bonnet studs (13).
Note:
Proper tightening of the bonnet nuts compresses the bonnet gasket set (F1, F2 and F3)
enough to both load and seal the seat ring gasket (F4). It also compresses the outer edge
of the bonnet gasket enough to seal the body-to-bonnet joint.
Ensure that bolting threads are clean, and evenly tighten the nuts onto the studs in a
diagonal pattern. Because of the bolt-up characteristics of spiral wound gaskets, a
tightened nut may loosen an adjacent nut. Repeat the diagonal tightening pattern several
times until each nut is tight and the body-to-bonnet seal is made. When the operating
temperature has been reached, perform this torquing procedure once again.
10. Lubricate the studs (13) and tighten the nuts ( 14), using proper bolting procedures. (See
Table 1 'Recommended tightening torques', page 18).
11. Tighten the stuffing box nuts (16) until the stuffing box ring (19) sits on the shoulder of the
stuffing box bush (18).
12. Mount the actuator on the valve body assembly and reconnect the actuator and valve stem
according to the procedure in the appropriate actuator Installation and Maintenance Instructions.
IM-F12-31 CH Issue 2
11
Fig. 2
8
16
19
18
9
13
6
10
14
F4
Spiral gasket
F3
Spacer ring
F2
Graphite gasket
F1
IM-F12-31 CH Issue 212
4.4 Procedure for renewing graphite gland seals
If there is undesirable packing leakage first try to limit the leakage and establish a stem seal by
tightening the stuffing box nuts (16).
Note: If the packing is relatively new and tight on the stem, and if tightening the stuffing box nuts
does not stop the leakage, it is possible that the valve stem is worn or damaged so that a seal cannot
be made.
4.4.1 Replacing graphite gland seals:
13. Copy Steps 1 to 10 in Section 4.3.1, (page 10), taking note when removing the belleville springs,
of the position of each disc.
14. Install the packing components according to the order in Fig. 3.
Install the graphite rings (23) individually, by partially entering the ends together into the gland,
before inserting the remainder of the ring. The ring should should be pressed firmly to the
bottom of the housing, using the follower and / or a spacer as required.
15. Install each of the remaining rings in the same way, ensuring that the join is staggered
by at least 90° from the previous ring, and firmly push each ring into the gland.
16. Fit the packing follower (22), refit the belleville washers (25) following the original order, and
stuffing box ring (19) into position. Lubricate the stuffing box nuts (16). Install and tighten the
packing flange nuts finger tight.
17. Mount the actuator on the valve body assembly and reconnect the actuator and valve stem.
18. The packing should now be compressed by a nominal 10%. Mark a line on the follower 3 mm
above the top of the gland housing. Then tighten the packing flange nuts, until the line on the
follower reaches the top of the housing (See Figs. 3a and 3b opposite).
19. With the packing initially compressed to a nominal 10%, check the torque on the stuffing box
nuts. At this point it is beneficial to perform at least 5 settling cycles, with the nut torque being
restored during each cycle.
Therefore, operate the valve through approximately 5 cycles, and retorque the nuts at both
the top and the bottom of the stroke.
IM-F12-31 CH Issue 2
13
Fig. 3a
Fig. 3b
Fig. 3 Graphite gland seal assembly
3 mm
Line
marked
on the
follower
25
22
23
IM-F12-31 CH Issue 214
4.5 Trim maintenance
4.5.1 Disassembly of valves with standard bonnet and
temperature extension bonnet:
1. Remove the actuator and the bonnet according to Steps 1 to 5 of the replacing chevron seals
procedure (see Section 4.3.1, page 10).
Caution:
When lifting the valve plug stem (6) and attached valve plug (3) out of the body, be certain
that the cage (4) remains in the body (1). This will prevent cage damage that might be caused
by the cage dropping back into the body after being lifted part way out.
2. Packing parts can be removed if desired. Replace these parts as described in the replacing
packing procedure, (see Section 4.3.1, page 10). Remove the cage adaptor (27) from any
restricted-trim body, and wrap it for protection. The cage adaptor has two M6 screwed holes
in which studs or bolts can be installed for lifting.
3. Lift the valve plug and stem assembly out of the valve body and set it on a protective surface.
If the valve plug is to be reused, protect the valve plug seating surface to prevent any scratches.
4. Remove the cage and the associated gaskets (F1, F2 and F3), (see Fig. 4a).
5. Remove the seat (5) and seat gasket (F4).
6. Inspect parts for wear or damage which would prevent proper operation of the valve. Replace
or repair trim parts according to the procedures for lapping seating surfaces or other valve plug
maintenance procedures as apropriate (see Section 4.6).
4.5.2 Disassembly valves with bellows sealed bonnet (refer to Fig. 6):
1. Remove the actuator and the bonnet according to Steps 1 to 5 of the replacing chevron
seals procedure (see Section 4.3.1, page 10).
2. Unscrew the nuts (14) securing the bonnet to the bellows housing (31) and remove the bonnet
assembly.
3. Unscrew the nuts (30) securing the bellows housing to the valve body and remove the housing
complete with stem and plug.
Carefully supporting the bellows housing, remove the pin fixing the valve head to the stem (26).
Remove the valve head and the cage adaptor (27) (see Fig. 4b) for restricted trim valves and
withdraw the stem / bellows assembly (18) from the bellows housing.
4. Remove the cage and the associated gaskets (F1, F2, and F3), (see Fig. 4a).
5. Remove the seat (5) and seat gasket (F4).
6. Inspect parts for wear or damage which would prevent proper operation of the valve. Replace
or repair trim parts according to the procedures for lapping seating surfaces or other valve plug
maintenance procedures as appropriate (see Section 4.6).
4.6 Lapping seating surfaces
Seating surfaces of the valve plug and seat ring (3 and 5) can be lapped for improved shut-off.
(Deep nicks should be machined out rather than ground out). Use a commercial lapping
compound or a mixture of 600-grit carborundum and solidified vegetable oil. Assemble the valve
to the extent that the cage, and adaptor ring if used, and bonnet, is in place and the bonnet is
bolted to the body. A simple handle can be made from a piece of steel strip locked to the valve
plug stem with nuts.
Rotate the handle alternately in each direction to lap the seats. After lapping, remove the bonnet
and clean the seat surfaces. Completely assemble as described in the trim maintenance
procedure (Section 4.5) and test the valve for shut-off. Repeat the lapping procedure if leakage
is still excessive.
IM-F12-31 CH Issue 2
15
Fig. 4b Reduction kit
Fig. 4a 'C' Series valve
4
F5
Adaptor gasket
6
3
7
F4
Spiral gasket
F3
4
Reduction kit (K)
27
26
Spacer ring
F2
Graphite gasket
F1
16
18
19
10
17
2
9
11
6
Fig. 4 Extended bonnet
IM-F12-31 CH Issue 216
4.7 Valve plug and stem maintenance:
Caution:
If replacing the valve plug sealing rings (7), be careful not to scratch the surfaces of the ring
grooves in the valve plug, the surfaces of the replacement ring, may not seal properly.
1. Remove the valve plug (3) in accordance with the instructions in trim maintenance, (see
Section 4.5, page 14).
2. To replace the valve stem (6) drive out the groove pin (26) and unscrew the stem from the
valve plug.
3. Screw the new stem into the valve plug. Tighten to the recommended torque see Table 1,
page 18. Refer to Table 1 to select the proper drill size. Drill through the stem, using the hole
in the valve plug as a guide. Remove any chips or burrs and drive in a new groove pin to lock
the assembly.
4.7.1 Assembly standard and extension bonnet valves
1. Install the seat ring gasket (F4), and seat (5).
2. Install the cage (4). Rotation of the cage or assembly with respect to the body is acceptable.
3. Slide the valve plug (3) and stem assembly into the cage. Make sure the valve plug sealing rings
(7) are evenly engaged in the entrance chamfer at the top of the cage (4) to avoid damaging
the rings.
4. If a cage adaptor (27) is to be used, install the adaptor gasket (F5) and place it on top of the
cage. Place the gaskets (F1, F2, and F3) on top of the cage or cage adaptor, (see Fig. 5).
Caution:
If the packing is to be reused and was not removed from the bonnet, use care when installing
the bonnet to avoid damaging the packing with the valve stem threads.
5. Mount the bonnet on the body and complete assembly according to Steps 10 to 12 of the
procedure for replacing chevron gland seals Section 4.3, page 10, omitting Step 11 if new
packing is not being installed, and being sure to observe the 'Note' prior to Step 10.
4.7.2 Assembly bellows sealed bonnet valves
1. Install the seat gasket (F4), and seat (5), (see Fig. 5).
2. Install the cage (4). Rotation of the cage or assembly with respect to the body is acceptable.
Place the gaskets (F1, F2, and F3) on top of the cage.
If a cage adaptor (27) is to be used, install the adaptor gasket (F5).
3. Insert replacement stem / bellows assembly (6) with new lower bellows flange gasket (29)
ensuring that the anti-rotation pin (28) locates in the slot in the bellows housing (31) and taking
great care not to damage the bellows. If a cage adaptor (27) is to be used, place it onto the stem
before sliding on the gaskets (F1, F2 and F3).
4. Fit the valve plug (3) and the head pin (26). Peen the entrance to the head pin bore to prevent
the pin working loose in operation.
By sliding the valve plug into the cage, refit the bellows housing (31) on the valve body.
When the cage adaptor is used, fit it on the top of the cage.
Replace the nuts (14) and tighten to the recommended torque (see Table 1, page 18).
Using a new gasket (32) refit the bonnet (2) on the bellows housing (31). Replace the four nuts
(30) and tighten to the recommended torque (see Table 1, page 18).
Caution:
If the packing is to be reused and was not removed from the bonnet, use care when installing
the bonnet to avoid damaging the packing with the valve stem threads.
5. Mount the bonnet on the body and complete assembly according to Steps 10 to 14 of the
procedure for replacing chevron gland seals Section 4.3, page 10, omitting Steps 11 and 12
if new packing is not being installed, and being sure to observe the 'Note' prior to Step 10.
IM-F12-31 CH Issue 2
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Fig. 6 Bellows sealed bonnet
16
19
10
30
2
31
28
12
17
18
11
8
6
14
13
32
Fig. 5 'C' Series valve
4
F5
Adaptor gasket
6
3
7
F4
Spiral gasket
F3
4
Reduction kit (K)
27
26
Spacer ring
F2
Graphite gasket
F1
IM-F12-31 CH Issue 218
5. Spare parts
The spare parts available for the CE43, CE63 and CE83 valves, 1" to 8" (DN25 to DN200), are
detailed below. No other parts are supplied as spares.
Available spares
Actuator clamping nut A
Gland seal kit
PTFE seal set B
Graphite packing set C
Valve plug D
Valve stem E
Graphite gasket F1
Bonnet Spacer F2
Valve gasket kit Spiral wound gasket F3
Seat F4
Adaptor gasket F5
Piston seal kit
Graphite G
PTFE H
Valve seat I
Valve cage J
Reduction kit (seat, cage and reduction adaptor) K
Note: A 'valve gasket kit' should be ordered with the above items.
Table 1 Recommended tightening torques
Bonnet nuts (14)
Valve size Nut size
Nut torque lbf ft (N m)
minimum to maximum
1" ½" 22.1 to 29.5 (30.0 to 40.0)
1½" 3" 38.3 to 45.7 (52.0 to 62.0)
2" 3" 46.8 to 54.2 (63.5 to 73.5)
2½" ¾" 81.5 to 96.2 (110.5 to 130.5)
3" ¾" 72.6 to 87.4 (98.5 to 118.5)
4" 4" 116.5 to 131.3 (158.0 to 178.0)
5" 4" 140.1 to 154.9 (190.0 to 210.0)
6" 1" 169.6 to 184.4 (230.0 to 250.0)
8" 11" 184.4 to 199.1 (250.0 to 270.0)
Valve stem to plug connection
Valve stem size Bolt torque Groove pin replacement
ins (mm) min. to max. lbf ft (N m) Drill size ins (mm)
½" (12.7) 59.0 to 73.7 (80 to 100) 0.08" (2)
¾" (20.0) 169.6 to 199.1 (230 to 270) 0.08" (2)
Bellows seal bonnet packing flange nuts (30)
Valve size Bolt torque min. to max. lb ft (N m)
1" to 4" 36.9 to 44.3 (50 to 60)
5" to 8" 51.6 to 59.0 (70 to 80)
IM-F12-31 CH Issue 2
19
4
F5
Adaptor gasket
A
E
B or C
D
G
or H
F4
I
'C' series valve
F1
F2
F3
J
Reduction kit (K)
Note:
When placing an order for spares please indicate clearly the product code, serial number
and date code (found on the label of the valve body) to ensure that the order is processed
quickly, efficiently and correctly.
How to order spares
Always order spares by using the description given in the column headed 'Available spares'. Also
state the information shown in the 'C' series valve selection guide (See page 20), the serial
number, and date code of the valve.
27
Fig. 7 Spare parts
14
IM-F12-31 CH Issue 220
Valve size
1", 1½", 2", 2½", 3", 4", 5", 6" and 8"
DN25, 40, 50, 65, 80, 100, 125, 150 and 200
Valve series C = Cage trim
E = Equal percentage
Valve characteristic
F = Fast opening
L = Linear
M = Modified equal percentage
4 = Carbon steel
Body material
6 = Stainless steel
8 = Alloy steel
2 = Butt weld (2" to 8")
Connections 3 = Flanged
4 = Socket weld (1", 1½" and 2")
P = PTFE chevron
Stem sealing options H = Graphite
B = Bellows
T = AISI 431 hardened
Seating options G = PTFE soft seat
W = Hard faced stellite AISI 316
C = Standard cage
Type of trim P = Noise reducing perforated cage
A = Anti-cavitation cage
1 = One
Number of stages
2 = Two
3 = Three
Other = To be specified
Trim balancing
B = Balanced
U = Unbalanced
S = Standard
Bonnet type H = Extended for high temperature
L = Extended for low temperature
0 = No reductions
Reduced trim 1 = 1 Reduction
2 = 2 Reductions
3 = 3 Reductions
C
v
To be specified
Connection type To be specified
How to order
Example: 1 off 2" CE43PTC1US1 Cv 35 flanged to ANSI 300.
'C' series valve selection guide
2"
43CE
Cv 35
PT
C1
U S
2"
C
E
4
3
P
T
C
1
U
S
Cv 35
ANSI 300
1
ANSI 300
1
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