background image

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

WARNING

!

Failure to follow these instructions or 

to properly install and maintain this 

equipment could result in an explosion, 

fire 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 qualified 

person must install or service the unit.
Installation, operation and maintenance 

procedures performed by unqualified 

personnel may result in improper 

adjustment and unsafe operation. Either 

condition may result in equipment 

damage or personal injury. 

Figure 1.

 Type CT88

Use

 

qualified 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 flow capability, 

as compared with other backpressure regulators, 

maximizes transfer efficiency.

Instruction Manual

D104030X012
May 2019

Type CT88

Summary of Contents for Fisher CT88

Page 1: ...tion Only a qualified person must install or service the unit Installation operation and maintenance procedures performed by unqualified personnel may result in improper adjustment and unsafe operation Either condition may result in equipment damage or personal injury Figure 1 Type CT88 Use qualified personnel when installing operating and maintaining the Type CT88 backpressure regulator Introduct...

Page 2: ...pressures contact the factory 3 It may be assumed that the material temperature is the same as the working fluid 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 Principle of Operatio...

Page 3: ...n to permit free flow of gas to the atmosphere Protect openings against entrance of rain snow insects or any other foreign material that may plug the vent Do not install the Type CT88 backpressure regulator in hazardous or flammable service indoors or in an enclosure where accumulation of vented fluid may occur In hazardous or flammable fluid applications vented fluid may accumulate and cause pers...

Page 4: ...esult if this backpressure regulator is Overpressurized Used with incompatible process fluid Installed where service conditions could exceed the limits given in the Specifications 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 s...

Page 5: ...lator damage personal injury and property damage To avoid such injury and property damage make certain the bleed plug is properly closed after bleeding process fluid 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 rele...

Page 6: ...sembly 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 flange 4 Lift the upper casing key 59 direct...

Page 7: ...agm 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 list...

Page 8: ...ng 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 Office 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 elast...

Page 9: ...carbon 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 FK...

Page 10: ...53 52 51 50 30 44 60 34 37 58 48 59 57 56 36 68 17 16 54 55 8 65 BLEED PLUG DETAIL D 66 DETAIL D Figure 4 Type CT88 Actuator Assembly 10 Type CT88 ...

Page 11: ...31 30 61 16 17 15 14 13 8 12 11 10 9 7 6 4 3 2 1 5 K H 24 29 21 23 20 22 DETAIL H DETAIL K 18 Figure 5 Type CT88 Body Assembly for NPS 2 DN 50 11 Type CT88 ...

Page 12: ...ein 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 specifications 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 select...

Reviews: