Emerson Fisher CT88 Instruction Manual

Instruction Manual
D104030X012

May 2019

Type CT88 Backpressure Regulator

Table of Contents

Introduction .................................................................. 1

Specifications .............................................................. 2

Principle of Operation .................................................. 2

Installation ................................................................... 3

Overpressure Protection.............................................. 4

Startup ......................................................................... 4

Adjustment...................................................................5

Shutdown.....................................................................5

Maintenance ................................................................ 5

Parts Ordering ............................................................. 8

Parts List......................................................................9

Type CT88

WARNING

!

Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion,

re and/or chemical contamination

causing property damage and personal
injury or death.

Fisher™ backpressure regulators must
be installed, operated and maintained
in accordance with federal, state and
local codes, rules and regulations
and Emerson Process Management
Regulator Technologies, Inc.
(Emerson) instructions.

If a leak develops or if the outlet
continually vents liquid, service to
the unit may be required. Failure
to correct trouble could result in a

hazardous condition. Only a qualied

person must install or service the unit.

Installation, operation and maintenance

procedures performed by unqualied

personnel may result in improper
adjustment and unsafe operation. Either
condition may result in equipment
damage or personal injury.

Figure 1. Type CT88

Use qualied personnel when installing,
operating and maintaining the Type CT88
backpressure regulator.

Introduction

Scope of the Manual

This Instruction Manual provides instructions
for the installation, adjustment, maintenance
and parts ordering information of Type CT88
backpressure regulator.

Product Description

The Type CT88 backpressure regulator (Figure 1) is
used to maintain backpressure on Lease Automatic
Custody Transfer (LACT) skids. It is designed to allow
accurate measurement by the positive displacement
pump or coriolis meter and protect other upstream

LACT skid equipment. The high ow capability,

as compared with other backpressure regulators,

maximizes transfer efciency.

Type CT88

Specications

The Specications section lists the specications for the Type CT88 backpressure regulators. Factory specication is

stamped on the nameplate fastened on the backpressure regulator at the factory.

Body Sizes

NPS 2, 3 and 4 / DN 50, 80 and 100

End Connection

CL150 RF

Maximum Working Pressure

(1)(4)

Based on CL150 RF Flange Pressure Rating,
See Table 1

Backpressure Control Ranges

(1)(2)

NPS 2 / DN 50: 10 to 145 psi / 0.7 to 10 bar
NPS 3 and 4 / DN 80 and 100: 15 to 145 psi /

1.0 to 10 bar

Wide-Open Flow Coefcients C

v

NPS 2 / DN 50–Cv: 59
NPS 3 / DN 80–Cv: 148

Shutoff Classication

ANSI Class VI

Temperature Capabilities

Fluorocarbon (FKM)

Construction Materials

Body: Carbon steel (WCB)
Diaphragm and Seals: Fluorocarbon (FKM)
Trim Parts: 316 Stainless steel

Control Line Connection Size

1/4 NPT

Approximate Weights

NPS 2 / DN 50: 89 lbs / 40 kg
NPS 3 / DN 80: 131 lbs / 60 kg
NPS 4 / DN 100: 184 lbs / 84 kg

NPS 4 / DN 100–Cv: 240

Flow Characteristic

Quick Open

1. The pressure/temperature limits in this Instruction Manual and any applicable standard limitation should not be exceeded.

2. For lower set pressures, contact the factory.

3. It may be assumed that the material temperature is the same as the working uid temperature.

4. Maximum inlet pressure depends on working temperature (Refer to ASME B16.42 or Table 1).

5. Fluorocarbon (FKM) is limited to 200°F / 93°C for hot water.

6. Increased working temperature may reduce the maximum inlet pressure range (Refer to ASME B16.42 or Table 1).

(1)(3)

(5)

: 20 to 248°F / -7 to 120°C

(6)

Table 1. Pressure-Temperature Ratings for CL150 Carbon steel (WCB)

TEMPERATURE

20 to 100 290

-7 to 38

1. For intermediate temperatures, linear interpolation is permitted.

(1)

°F psi

200 260

248 245

°C bar

50

100

120

Principle of Operation

See Figure 2. Type CT88 direct-operated
backpressure regulator responds to changes in inlet
pressure. Inlet pressure is registered on the underside
of the diaphragm through an external sensing line that
is connected to the lower diaphragm casing.

As long as the inlet pressure remains below setpoint,
control spring keeps the disk against the seat ring

providing tight shutoff with no ow through the

backpressure regulator.

MAXIMUM WORKING PRESSURE

20.0

17.0

17.9

16.9

When inlet pressure rises above the set pressure,
pressure on the diaphragm overcomes the control
spring force. This causes the diaphragm to move
upward, lifting valve stem together with the valve plug

away from seat ring. The ow path through the valve

opens and excess pressure is vented. When upstream
pressure drops below setpoint, the valve closes.

2

VENT

Type CT88

ADJUSTING SCREW

VENT

INLET PRESSURE

OUTLET PRESSURE

ATMOSPHERIC PRESSURE

Figure 2. Type CT88 Backpressure Regulator Operational Schematic

Installation

WARNING

!

Personal injury or system damage may
result if this backpressure regulator
is installed, without appropriate
overpressure protection, where service
conditions could exceed the limits given

in the Specications section and/or

backpressure regulator nameplate. Refer
to Overpressure Protection section for
recommendations on how to prevent
service conditions from exceeding
those limits.

Additionally, physical damage to the
backpressure regulator may result in
personal injury or property damage due

to escaping of accumulated uid. To

avoid such injury and damage, install the
backpressure regulator in a safe location.

All vents should be kept open to permit

free ow of gas to the atmosphere.

Protect openings against entrance of
rain, snow, insects or any other foreign
material that may plug the vent.

SPRING CASE

SEAT RING

CONTROL SPRING

DIAPHRAGM

VALVE SPRING

BODY

SENSING LINE

Do not install the Type CT88
backpressure regulator in hazardous

or ammable service indoors or in

an enclosure where accumulation of

vented uid may occur. In hazardous
or ammable uid applications, vented
uid may accumulate and cause

personal injury, death, or property

damage due to re, explosion and/or

chemical contamination.

Note

To avoid premature wear of internal
parts, it is recommended that the
actuator be oriented vertically as shown
in Figures 1 and 2.

General Installation Instructions

• Vertical installation with the actuator installed
directly above the main valve is recommended for
optimal performance, as shown in Figures 1 and 2.

• The use of the bleed plug is recommended for
installations of the actuator mounted above the
main valve.

3

Type CT88

• The unit will operate in horizontal installations with
the actuator on the side, however, this could result
in premature wear of the parts.

• Make sure that ow will be in the same direction as

indicated by the ow arrow on the body.

Note

For proper backpressure regulator
control and operation, make sure that the

ow arrow matches the ow direction.

CAUTION

To protect against precipitation,
make sure that the actuator is
oriented upward.

Some installations, such as areas with heavy
snowfall, may require a hood or enclosure to protect

the backpressure regulator from snow load and vent
freeze over.

1. Before installing the backpressure regulator:

• Check for damage which might have occurred
during shipment.

• Check and remove any dirt or foreign
material which may have accumulated in the
backpressure regulator body.

• Blow out any debris, dirt or copper sulfate in the
tubing and pipeline.

2. Body installed horizontally with the actuator spring
case pointing upward is recommended.

3. Use gaskets between pipeline and regulator

anges when installing a regulator with anged

end connections. Use approved piping procedures
when installing the regulator.

Overpressure Protection

WARNING

!

Personal injury, equipment damage or
leakage due to escaping accumulated
liquid or bursting of pressure-containing
parts may result if this backpressure

regulator is:

- Overpressurized;

- Used with incompatible process uid;

- Installed where service conditions
could exceed the limits given in the

Specications section and on the

appropriate nameplate; or

- Where conditions exceed any
ratings of adjacent piping or
piping connections.

To avoid such injury or damage, provide
pressure-relieving or pressure-limiting
devices to prevent service conditions
from exceeding those limits.

Overpressuring any portion of this equipment may
result in equipment damage, leaks in the backpressure
regulator or personal injury due to bursting of
pressure-containing parts. The system should be
inspected after any overpressure condition.

The backpressure control range and maximum inlet

pressure can be found in the Specications section.

Startup

WARNING

!

To avoid possible personal injury,
equipment damage or leakage due

to escaping uid, make certain the

backpressure regulator is installed as
instructed in the Installation section.

Escaping process uid from an open

bleed plug may result in backpressure
regulator damage, personal injury and
property damage. To avoid such injury
and damage, make certain the bleed
plug is properly closed after venting air.

Always open bleed plugs slowly. These

plugs contain no packing, so some uid

weepage will occur when the plugs
are opened. Operating personnel must
protect themselves from exposure to

system uids.

CAUTION

Pressure gauges must always be
used to monitor upstream pressure
during startup.

4

1. Open the system shutoff valve.

2. Slowly open the outlet block valve.

3. Open the inlet block valve slightly and keep in this
position until pressure is maintained at the desired
setpoint and stabilized.

4. Slowly unscrew the bleed plug to exhaust air that
might have been trapped in the actuator. Screw
and tighten the plug. Exercise caution at all times.

5. If resetting setpoint, then set the regulator
to the desired set pressure according to the
Adjustment procedure.

Adjustment

WARNING

!

Personal injury, equipment damage or

leakage due to escaping uid may result

if adjusting screw and jam nut are not
installed properly.

Always use a pressure gauge to monitor pressure
when making adjustments.

The backpressure regulator spring can be backed
off to 0 psig / 0 bar. Recommended maximum inlet
pressures and temperatures are shown in Table 1.

1. Loosen the jam nut.

2. To increase the setting, turn the adjusting
screw clockwise. Turn the adjusting screw
counterclockwise to decrease the setting.

3. Tighten the jam nut to maintain the desired setting.

Shutdown

WARNING

!

Escaping process uid from an open

bleed plug may result in backpressure
regulator damage, personal injury and
property damage. To avoid such injury
and property damage, make certain
the bleed plug is properly closed after

bleeding process uid.

Type CT88

BLEED PLUG

Figure 3. Diaphragm Case

1. Close the inlet block valve (see Figure 2).

2. Close the outlet block valve.

3. Turn the adjusting screw counterclockwise until all
spring force from the backpressure regulator has
been removed.

4. Slowly open the outlet block valve to release
upstream pressure.

5. Slowly open bleed plug and make sure all pressure
has been relieved from the control line.

Maintenance

WARNING

!

Personal injury, equipment damage

or leakage due to escaping uid may

result if seals are not properly lubricated
or maintained. Due to normal part
wear or damage that may occur from
external sources, this backpressure
regulator should be inspected and
maintained periodically. The frequency
of inspection, maintenance and
replacement of parts depends upon
the severity of service conditions or
the requirements of local, state and
federal regulations.

Backpressure regulators that have been
disassembled for repair must be tested
for proper operation before being returned
to service. Only parts manufactured by
Emerson should be used for repairing
Fisher™ backpressure regulators. Restart
liquid utilization equipment according to
normal startup procedures.

5

Type CT88

Note

To protect against reduced performance,
ensure vents are not plugged when
conducting routine maintenance.

• Before maintenance, close the inlet and outlet block
valves and exhaust the pressure in the valve body
and piping as described in the Shutdown section.

• When removing or replacing parts such as the

orice or diaphragm, be careful not to damage it.

• Ensure movable parts can move freely
after reassembly.

• Recommission according to the Installation and
Startup procedures.

• Ensure all connections are tight and check for leaks.

Regular Maintenance

1. Make sure that there is no leakage on the

backpressure regulator and tubing connections.

2. Observe the gauges to make sure that the

pressure being controlled is stable and at the
correct set point.

3. Ensure the pipeline system is clean and free of

foreign materials.

Periodic Maintenance

1. Check Type CT88 backpressure regulator reseat

pressure. Slowly increase the inlet pressure until
the outlet pressure starts to rise, then slowly
decrease the inlet pressure until the outlet
pressure stabilizes. Ensure that the downstream
pressure does not increase.

2. Clean wear parts like the Disk, Diaphragm and

Seat Ring. Make sure to check and replace
deformed and worn out seals when necessary.

3. Check wear parts for damage and replace when

necessary, replace O-rings after disassembly.

Maintenance Instructions for Actuator

Replacement Parts (keys 15, 21, 22, 23,
56 and 68)

Refer to Figure 4 for the Type CT88 Actuator
Assembly, Figure 5 for the NPS 2 / DN 50 body
assembly drawing and Figure 6 for the NPS 3 and 4 /
DN 80 and 100 body assembly drawing.

Actuator Disassembly

1. Isolate the Backpressure Regulator, relieve all
pressure in body and actuator and relieve spring
force by following the procedure described in the
Shutdown section.

2. Loosen and remove sense line from diaphragm
lower casing (key 54).

3. Loosen and remove 8 bolts (key 58), 8 nuts
(key 57) and 8 washers (key 8) around the

actuator ange.

4. Lift the upper casing (key 59) directly upward over
the main spring (key 48). Set aside spring and
upper spring seat (key 50).

5. Loosen and remove 2 hex nuts (keys 60 and 34)
from stem (key 14)

6. Remove lower spring seat (key 37), diaphragm
plate (key 55) diaphragm (key 56), diaphragm
head (key 36) and O-ring (key 68) upward and
over stem (key 14)
pin (key 66) from diaphragm head (key 36).

7. Loosen and remove 4 screws (key 16) and
4 spring washers (key 17).

8. Carefully remove diaphragm lower casing (key 54)
upward and over stem (key 14).

9. Remove bushing (key 20), 2 stem guides (key 21),
O-rings (keys 22 and 23) upward over the stem
(key 14).

10. Remove O-ring (key 15).

(1)

.

(1)

. Do not damage or remove

Actuator Assembly

1. Lightly lubricate O-ring (key 15) and place it into
the body.

2. Carefully place the diaphragm lower casing on
the body, make sure the thread holes on both
of casing and body are aligned. The position of
sense line pipe hole should be aligned with the
sense line pipe hole of the body.

3. Place spring washers (key 17) on screw (key 16),
apply lubricant to the thread of bolts.

4. Bolt body and casing together and tighten screws
(key 16) securely using a multi-pass, criss-cross
pattern. Torque values listed in Table 4.

5. Lightly lubricate O-ring (key 68) and mount it into
the groove of diaphragm head (key 36); Insert the
stem (key 14) through center of the diaphragm
head, and press until it makes contact with

1. Refer to Figures 5 and 6.

6

Type CT88

diaphragm lower casing (key 54), make sure the
ribs of the diaphragm head are aligned in between
the screws (key 16) and washers (key 17).

6. Lay the diaphragm (key 56) on the surface
of diaphragm head (key 36); make sure all
diaphragm holes are aligned with the pin (key 66)
and the bolt holes of diaphragm lower casing
(key 54) for the remainder of the assembly steps.

Note

Exercise care to ensure that the

diaphragm (key 56) is not pinched, twisted

or wrinkled while compressing between
the upper and lower diaphragm casings

(keys 59 and 54), diaphragm head and
diaphragm plate (keys 5 and 36).

7. Place the diaphragm plate (key 55) and lower
spring seat (key 37) on the diaphragm in turn and
tighten using two nuts (keys 34 and 60). Thin nut
(key 34) is below the nut (key 60). Make sure the
pin (key 66) is inserted into the hole of diaphragm
plate (key 55). Tighten securely, torque values
listed in Table 4.

Note

Hold the wrench at on top of stem

(key 14) while tightening the nuts

(keys 34 and 60). Make sure the

diaphragm does not move or become
pinched, twisted or wrinkled.

8. Insert upper spring seat (key 50) into the spring
(key 48) and apply lubricant into the hole of the
spring seat that contacts the adjusting screw
(key 53) and to both ends of the spring.

9. Place the spring (key 48) and upper spring seat
(key 50) onto the lower spring seat (key 37).

Note

Make sure the position of stem and
lower spring seat are at the center of
the spring.

10. Place the upper diaphragm casing (key 59) (along
with other attached components) over the spring
(key 48) and upper spring seat (key 50). Align
the bolt holes of the upper diaphragm casing and
lower diaphragm casing.

11. Apply lubricant to the thread of 8 bolts (key 58)
and insert the bolts down through the upper
diaphragm casing (key 59) then through the lower
diaphragm casing (key 54).

12. Place 8 washers (key 8) and 8 nuts (key 57)
onto the 8 bolts (key 58) from below the lower
diaphragm casing (key 54). Tighten the nuts
and bolts using a multi-pass, criss-cross pattern.
Torque values listed in Table 4.

Maintenance Instructions for Body

Replacement Parts (keys 2, 3, 7, 9, 10

and 11)

Refer to Figure 5 for maintenance instructions
for NPS 2 / DN 50 body. Refer to Figure 6 for
maintenance instructions for a NPS 3 and 4 / DN 80
and 100 body.

Body Disassembly

1. Isolate the Backpressure Regulator, relieve all
pressure in body and actuator and relieve spring
force by following the procedure described in the
Shutdown section.

2. Loosen and remove 8 bolts (key 13) and 8
washers (key 8 for NPS 2 / DN 50 and key 26 for
the NPS 3 and 4 / DN 80 and 100 body).

3. Carefully, remove the bonnet (key 12) (along with
all other attached components) upward and out of
the body (key 1).

Note

Some components may stick together
and seem to be connected. Be careful
not to allow these components to drop
or separate unexpectedly e.g. sleeve

(key 6), O-rings (keys 7, 10 and 11) and
sliding ring (key 9).

4. Slide apart sliding ring (key 6) from piston (key 4)
to access 2 sliding rings (key 9) and O-rings
(keys 7 and 10).

5. Remove cage (key 18), seat ring (key 3) and
O-ring (key 2).

6. Replace worn or damaged parts during assembly
by following the procedure described in the Body
Assembly section.

Body Assembly

1. Clean the surface and interior of the body (key 1)
by using penetrating oil, water removal spray,
and/or air gun. Lightly lubricate O-ring (key 2)
and place it on the corner of body/seat ring
(key 3) intersection.

7

Type CT88

Table 2. Troubleshooting

PROBLEM POSSIBLE CAUSE POSSIBLE SOLUTION

Backpressure regulator is undersized or oversized Review sizing

Backpressure regulator is not working

Application flow rate exceeds product's advertised capacity Review sizing

Backpressure regulator inlet pressure increases

Debris caught in between disk and seat ring Remove debris

Damaged, deformed or worn out diaphragm Replace diaphragm

Backpressure regulator lock-up

pressure decreases

Debris caught in between disk and seat ring Clean or replace disk

Backpressure regulator inlet pressure fluctuates Actual flow rate much lower than normal

Damaged diaphragm Replace diaphragm

Restrictor or control line is blocked Check restrictor and control line, clean debris

O-ring in disk assembly damaged Replace O-ring

Deformed or worn out disk or seat ring Replace disk or seat ring

Damaged disk assembly O-ring Replace O-ring

Review sizing or check upstream equipment when

upstream pressure fluctuates

Table 3. Spare Parts Kits

BODY SIZE

NPS DN

2 50 RCT88X00F22

3 80 RCT88X00F32

4 100 RCT88X00F42

1. Includes diaphragm, O-rings, stem guide, ring sliding, seat, etc.

2. Place the seat ring (key 3) onto the step inside the
body carefully, make sure the O-ring (key 2) does
not move.

3. Place the cage (key 18) into the groove of the
seat ring (key 3).

4. Lightly lubricate O-ring (key 7) and 2 sliding rings
(key 9), and install the O-ring and sliding rings into
the grooves of the sleeve (key 6) in turn.

5. Lightly lubricate O-ring (key 10) and place it into
the groove at the top of the sleeve (key 6).

6. Insert the trim assembly (key 4 and other attached
components) through the sleeve/sliding ring/
O-ring assembly (keys 6, 7 and 9) from top of the
sleeve, make sure the O-ring (key 7) is not moved
or damaged.

7. Lightly lubricate O-ring (key 11) and place into
the corner of the body/bonnet interface (keys 1
and 12).

8. Insert trim assembly (key 4 and other attached
components) and sleeve/sliding/O-ring assembly
(keys 6, 7 and 9) into body (key 1), press until
piston (key 4) contacts seat ring (key 3) and
sleeve (key 6) contacts cage (key 18).

(1)

SPARE PART NUMBER

9. Carefully align the bonnet (key 12) on to body
(key 1) into the correct orientation.

Note

The sense line hole in the lower diaphragm

casing (key 54) should align with the sense

line hole in the body (key 1).

10. Press bonnet (key 12) down until it contacts the
body (key 1).

11. Apply the lubricant to thread of bolts (key 13), then
bolt together the bonnet and body using washers
(key 8 for NPS 2 / DN 50 and key 26 for the NPS 3
and 4 / DN 80 and 100 body). Tighten bolts using
a multi-pass, criss-cross pattern by using a torque
wrench. Torque values are listed in Table 4.

Parts Ordering

When corresponding with your local Sales Ofce

about this regulator, include the type number and all
other pertinent information stamped on the nameplate.
Specify the part name when ordering new parts
from the following parts list. Separate repair part kits
containing all recommended elastomer spare parts
are available.

8

PART NAME

Screw (key 16), 4 required 18.5 to 22.1 25 to 30

Bolts (key 42); Nuts (key 40) 20.7 to 23.6 28 to 32

NPS 2 / DN 50 44.3 to 55.3 60 to 75

Bolts (key 13), 8 required

Hex Nut (key 34) 11.8 to 14 16 to 19

Hex Nut (key 60) 15.5 to 17.7 21 to 24

Bolts (key 45) 18.5 to 22.1 25 to 30

Bolts (key 58), 8 required; Nuts (key 57) 45 to 54.5 61 to 74

Locknut (key 29) 15.5 to 17.7 21 to 24

NPS 3 / DN 80 39.9 to 54.5 54 to 74

NPS 4 / DN 100 69.4 to 94.4 94 to 128

Parts List

Key Description

Type CT88 Spare Part Kits
(Repair Parts kit includes Diaphragm,

O-rings, Stem Guide, Ring Sliding, Seat, etc.) See Table 3
1 Body, Ductile Iron
2 O-ring, Fluorocarbon (FKM)
3 Seat Ring, Stainless steel/Fluorocarbon (FKM)
4 Piston, Stainless steel
5 Valve Spring, Stainless steel
6 Sleeve, Stainless steel
7 O-ring, Fluorocarbon (FKM)
8 Plate Washer, Steel
NPS 2 / DN 50 (16 required) and NPS 3 and 4 /
DN 80 and 100 (8 required)

9 Ring Sliding, 2 required, PTFE/ Molybdenum disulde

10 O-ring, Fluorocarbon (FKM)
11 O-ring, Fluorocarbon (FKM)
12 Bonnet, Carbon steel
13 Bolt, 8 required, Steel
14 Stem, Stainless steel
15 O-ring, Fluorocarbon (FKM)
16 Screw, 4 required, Stainless steel
17 Spring Washer, 4 required, Stainless steel
18 Cage, Stainless steel
19 Plate, Stainless steel
NPS 3 / DN 80
NPS 4 / DN 100
20 Bushing, Stainless steel
21 Stem Guide, 2 required, PTFE
22 O-ring, Fluorocarbon (FKM)
23 O-ring, Fluorocarbon (FKM)

Type CT88

Table 4. Torque Specications

TORQUE FOR ALL BODY SIZES

Ft-Lb N•m

Key Description

24 Plate Washer, 2 required, Steel
26 Plate Washer, 8 required, Steel
NPS 3 / DN 80
NPS 4 / DN 100
29 Locknut, Stainless steel
30 Nameplate
31 Rivet, 6 required
34 Hex Nut, Steel
36 Diaphragm Head, Stainless steel
37 Lower Spring Seat, Lower, Stainless steel
44 Spring Case, Stainless steel
48 Spring, Yellow, Chromium Silicon, 30 to 145 psi / 2 to 10 bar
50 Upper Spring Seat, Carbon steel
51 Spring Cap, Carbon steel
52 Nut, Steel
53 Screw Adjusting, Steel
54 Lower Diaphragm Casing, Lower, Carbon steel
55 Diaphragm Plate, Stainless steel
56 Diaphragm, Fluorocarbon (FKM)
57 Nut, 8 required, Steel
58 Bolt, 8 required, Steel
59 Upper Diaphragm Casing, WCB or Carbon steel
60 Hex Nut, Steel
61 Flow Arrow
65 Drain Valve Manual, Brass
66 Pin, Steel
68 O-ring, Fluorocarbon (FKM)
69 Connector, Steel
67 Restrictor, Stainless steel

9

Type CT88

53

52

51

50

30

66

48

44

60

34

37

58

59

8

57

36

68

56

55

17

16

D

54

DETAIL D

65

BLEED PLUG DETAIL

Figure 4. Type CT88 Actuator Assembly

10

DETAIL H

Type CT88

31

30

16

17

15

14

61

24

29

13

8

12

11

10

9

4

7

6

21

23

20

3

H

5

18

K

2

1

22

DETAIL K

Figure 5. Type CT88 Body Assembly for NPS 2 / DN 50

11

Type CT88

31

DETAIL E

30

16

24

29

15

14

23

22

20

21

17

13

61

12

C

11

10

E

26

DETAIL C

9

7

18

6

5

4 19 3 2

1

Figure 6. Type CT88 Body Assembly for NPS 3 and 4 / DN 80 and 100

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McKinney, Texas 75070 USA
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Bologna 40013, Italy
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D104030X012 © 2014, 2019 Emerson Process Management Regulator
Technologies, Inc. All rights reserved. 05/19.
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.