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EMERSON CT88 Backpressure Regulator Instruction Manual

Summary

The Type CT88 backpressure regulator is a high-flow device designed to maintain precise backpressure on LACT custody transfer skids, maximizing fluid transfer efficiency and protecting upstream pumping equipment. This comprehensive manual provides qualified personnel with detailed instructions for the entire unit lifecycle, including initial installation, safe operation, adjustment procedures, routine maintenance guidelines, full technical specifications, and parts ordering information.

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Page 1 Text Content

Instruction Manual

Type CT88

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

WARNING!

Failure to follow these instructions or

Figure 1. Type CT88

to properly install and maintain this equipment could result in an explosion, Use qualified personnel when installing, fire and/or chemical contamination operating and maintaining the Type CT88 causing property damage and personal backpressure regulator. injury or death. Fisher™ backpressure regulators must

Introduction

be installed, operated and maintained in accordance with federal, state and

local codes, rules and regulations Scope of the Manual

and Emerson Process Management

This Instruction Manual provides instructions

Regulator Technologies, Inc.

for the installation, adjustment, maintenance

(Emerson) instructions.

and parts ordering information of Type CT88

If a leak develops or if the outlet

backpressure regulator.

continually vents liquid, service to the unit may be required. Failure

Product Description

to correct trouble could result in a hazardous condition. Only a qualified

The Type CT88 backpressure regulator (Figure 1) is

person must install or service the unit.

used to maintain backpressure on Lease Automatic

Installation, operation and maintenance Custody Transfer (LACT) skids. It is designed to allow procedures performed by unqualified accurate measurement by the positive displacement personnel may result in improper pump or coriolis meter and protect other upstream adjustment and unsafe operation. Either LACT skid equipment. The high flow capability, condition may result in equipment as compared with other backpressure regulators, damage or personal injury. maximizes transfer efficiency.

Page Summary Contents For EMERSON CT88 Backpressure Regulator Instruction Manual

Page 1 Instruction Manual Type CT88 D104030X012 May 2019 Type CT88 Backpressure Regulator Table of Contents Introduction ..................................................................1 Specifications ......
Page 2 Type CT88 Specifications The Specifications section lists the specifications for the Type CT88 backpressure regulators. Factory specification is stamped on the nameplate fastened on the backpressure r...
Page 3 Type CT88 ADJUSTING SCREW SPRING CASE CONTROL SPRING DIAPHRAGM SEAT RING VALVE SPRING SENSING LINE INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE Figure 2. Type CT88 Backpressure Regulator Operat...
Page 4 Type CT88 • The unit will operate in horizontal installations with - Installed where service conditions the actuator on the side, however, this could result could exceed the limits given in the in pre...
Page 5 Type CT88 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...
Page 6 Type CT88 Note Actuator Disassembly To protect against reduced performance, 1. Isolate the Backpressure Regulator, relieve all ensure vents are not plugged when pressure in body and actuator and relie...
Page 7 Type CT88 diaphragm lower casing (key 54), make sure the 12. Place 8 washers (key 8) and 8 nuts (key 57) ribs of the diaphragm head are aligned in between onto the 8 bolts (key 58) from below the lowe...
Page 8 Type CT88 Table 2. Troubleshooting PROBLEM POSSIBLE CAUSE POSSIBLE SOLUTION Backpressure regulator is undersized or oversized Review sizing Backpressure regulator is not working Damaged diaphragm Repl...
Page 9 Type CT88 Table 4. Torque Specifications TORQUE FOR ALL BODY SIZES PART NAME Ft-Lb N•m 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 5...
Page 10 Type CT88 DETAIL D BLEED PLUG DETAILD Figure 4. Type CT88 Actuator Assembly
Page 11 Type CT88 DETAIL K DETAIL H Figure 5. Type CT88 Body Assembly for NPS 2 / DN 50
Page 12 Type CT88 DETAIL C DETAIL E Figure 6. Type CT88 Body Assembly for NPS 3 and 4 / DN 80 and 100 [email protected] Facebook.com/Emerson Automation Solutions Fisher.com Linked In.com/company...

Manual Details

Brand Emerson
Pages 12
File Size 1.30 MB
Published June 06, 2026
35 views

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Frequently Asked Questions

Who should install and service the Type CT88 regulator?

Only qualified personnel must install, operate, or maintain the unit to avoid hazardous conditions.

What is the temperature rating for FKM seals?

Fluorocarbon (FKM) seals are rated from 20 to 248°F, but be aware that hot water is limited to 200°F/93°C.

How does the backpressure regulator operate?

It is direct-operated; it activates when the inlet pressure rises above the set pressure by overcoming a calibrated spring force.

What materials are used for the body and seals?

The body material is Carbon steel (WCB), while the diaphragm and sealing components are Fluorocarbon (FKM).