Imo GGG3D User Manual

TM

INSTRUCTION MANUAL

AND

PARTS LIST

FOR

GGG3D SERIES PUMPS

This Instruction Manual and General Instructions Manual, CA-1, should be
read thoroughly prior to pump installation, operation or maintenance.

WARNING

Manual No. SRM00097

Rev. 00

1

March - 2011

READ THIS ENTIRE PAGE BEFORE PROCEEDING

FOR SAFETY OF PERSONNEL AND TO PREVENT DAMAGE TO EQUIPMENT, THE FOLLOWING
NOMENCLATURE HAS BEEN USED IN THIS MANUAL:

DANGER

Failure to observe precautions noted in this box can result in severe bodily injury
or loss of life.

WARNING

Failure to observe precautions noted in this box can cause injury to personnel by
accidental contact with equipment or liquids. Protection should be provided by
user to prevent accidental contact.

CAUTION

Failure to observe precautions noted in this box can cause damage or failure of
equipment.

Non compliance of safety
instructions identified by
the following symbol

Safety instructions where
electrical safety is

involved are identified by:
could affect safety for
persons:

ATTENTION

Safety instructions which
shall be considered for
reasons of safe operation
of pump and/or protection
of pump itself are marked
by the sign:

ATTENTION

ATTENTION

If operation of pump is critical to your business, we strongly recommend you keep
a spare pump or major repair kit in stock at all times. As a minimum, a minor
repair kit (o-rings, gaskets, shaft seal and bearings) should be kept in stock so
pump refurbishment after internal inspection can be accomplished.

CONTENTS

Safety and Table of Contents ....................................................................................................2

A. General Instructions............................................................................................................. 3

B. Introduction.......................................................................................................................... 3

C. Description of Equipment.....................................................................................................3

D. Pump Model Identification ................................................................................................... 4

E. Ordering Instructions ........................................................................................................... 4

F. Operation ............................................................................................................................ 4

G. Parts List.............................................................................................................................. 5

H. Pump Maintenance.............................................................................................................. 6

L. Mechanical Seal Drawings .................................................................................................. 7

I. Troubleshooting................................................................................................................. 10

J. Field and Factory Service and Parts.................................................................................. 10

K. Assembly Drawings ........................................................................................................... 11

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A. GENERAL INSTRUCTIONS

Instructions found herein cover disassembly, assembly and parts identification of
GGG3D series pumps.

NOTE: Individual contracts may have specific provisions that vary from this manual. Should

any questions arise which may not be answered by these instructions, refer to the
General Instructions Manual, CA-1, provided with your order. For further detailed
information and technical assistance please refer to Imo Pump, Technical/Customer
Service Department, at [phone].

This manual cannot possibly cover every situation connected with installation, operation, inspection, and
maintenance of equipment supplied. Every effort was made to prepare text of manual so that engineering
and design data is transformed into most easily understood wording. Imo Pump must assume personnel
assigned to operate and maintain supplied equipment and apply instruction manual have sufficient technical
knowledge and are experienced to apply sound safety and operational practices which may not be
otherwise covered by this manual.

In applications where equipment furnished by Imo Pump is to become part of processing machinery, these
instructions should be thoroughly reviewed to ensure proper fit of said equipment into overall plant
operational procedures.

If installation, operation, and maintenance instructions are not correctly and strictly followed
and observed, injury to personnel or serious damage to pump could result. Imo Pump
cannot accept responsibility for unsatisfactory performance or damage resulting from
failure to comply with instructions.

WARNING

B. INTRODUCTION

This instruction manual covers series GGG3D Imo pumps. This series of pumps has been designed
for use in high inlet pressure, lubricating, seal oil applications. Model and design construction of each
pump can be identified by designator code on pump nameplate. Definitions of model designators are
identified in figure 1.

C. DESCRIPTION OF EQUIPMENT

GGG3D Series pumps are positive displacement, rotary screw pumps consisting of a precision bored
housing which encloses a driven screw (power rotor) and two intermeshing following screws (idler
rotors). These screws when rotating form a succession of closures or cavities. As they rotate, fluid is
moved axially from inlet port to outlet port in a continuous, uniform flow with minimum fluid pulsation
and pump noise.

D. PUMP MODEL IDENTIFICATION

This instruction manual covers Imo Series GGG3D pumps. The model of each pump is identified on
pump nameplate. Refer to figure 1 and table 2 for instructional keys when using this manual.

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Y

Figure 1 – Model Designator Definitions

GG G 3D R S J -400 P

Basic Pump Modifiers

–

GG

Very High Inlet Pressure

–

Design Modification

G

Series

R, N –

Multi - Spring Balanced Seal

with Viton

–Multi - Spring Balanced Seal
with Neoprene
X –Special Seal

Blank
S –Steel Casing

–

Cast Iron Pump

Lead and Rotation

250 Size Pump

Blank = 2D, CW P = 1.6D, CW
G = 1.8D, CW AJ = 1.35D, CW

AK = 1.35D, CCW AG = 1.1D, CW

275 Size Pump

Blank = 2D, CW E = 1.7, CW

312 Size Pump
Blank = 2D, CW P = 1.6D, CW
S = 1.4D, CW T = 1.4D, CCW
AE = 1.2D, CW

400 Pump Size
Blank = 2D, CW P = 1.6D, CW
AJ = 1.35D, CW

Rotor Size

J –Silicon Carbide Seat

E. ORDERING INSTRUCTIONS

When corresponding with Imo Pump regarding Series GGG3D series pumps, refer to pump
nameplate, this instruction manual, and assembly drawing as instructed below:

1. From pump nameplate, record pump model number, serial number, and manufactured date.

2. Record instruction manual number, revision, and date.

3. From instruction manual, record figure numbers that apply to replacement part(s).

4. From assembly drawing or parts list (see table 2) provide IDP number(s) and names for
replacement part(s).

5. Give above information to your Imo service representative.

Imo sales and service representatives are listed herein and in General Instruction Manual, CA-1.

F. OPERATION

F.1 LIQUID LIMITATIONS

Never operate with thin liquids such as solvents or water. Pump is designed for liquids having
general characteristics of oil.

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F.2 OPERATING LIMITS

Operating conditions, such as speed, fluid viscosity, temperature, inlet pressure,
discharge pressure, filtration, duty cycle, drive type, mounting, etc., are
interrelated. Due to these variable conditions, specific application limits may be
different from operational limitations. Equipment must not be operated without
verifying system operating requirements are within pump’s capabilities.

Under no circumstances are the following operating limits (specified in table 1) to be exceeded
without specific approval from Imo Pump.

Table 1 – Normal Pump Operating and Structural Limits

CAUTION

ATTENTION

Condition Limit

Maximum Speed

Viscosity Range 32 SSU to 15000 SSU

Liquid Temperature Range 0°F to 250°F

Maximum Inlet Pressure 400 psig

3500 rpm For Size 250

2500 Rpm for Sizes 275, 312, 400

Maximum Discharge Pressure (Continuous Duty) 500 psig

Filtration Refer to General Instruction Manual, CA-1

Drive Direct or Belt

Mounting Foot mounted in any attitude

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G. PARTS LIST

Table 2 – Pump Parts List

IDP QTY DESCRIPTION KIT IDP QTY DESCRIPTION KIT

1 1 Case 23 2 Thrust Hex Cap Screws
2 1 Housing XX 24 2 Thrust Plate Washer
3 1 Seal Vent Plug

25 1 Mechanical Seal X

(All Sizes but 400)
4 1 Anti-Rotation Tube XX 26 1 Inlet
5 2 Tube O-ring X 27 1 Tube Spacer (250 Only)
6 2 Housing O-ring X 28 1 Housing Spacer

(275 and 400 Only)
7 1 Inboard Cover O-Ring X 30 16 Outlet Washers (400 Only)
8 1 Inlet O-ring X 31 1 Pin Stop (400 Only) XX
9 1 Inboard Cover XX* 33 1 Fastener Seal (400 Only) X

10 8 Inlet Hex Bolts 38 1 Seal Spacer (Not 312)
11 1 Power Rotor XX 44 1 Seal Seat Adapter O-ring X
12 8 Seal Spacer Set Screws

(250 Only)

46 4 Thrust Spacer O-Rings

(312 Only)

XX
13 1 Retaining Ring X 67 4 Pipe Plugs
14 1 Spacer/Seal Seat Adapter 86 1 Bushing (275 Only) XX
15 1 Bearing X 92 1 Seal Spacer O-ring

X

(250 Only)

16 1 Key 93 8 Front Cover Hex Bolts

(Except 312 Size)
17 1 Bearing Retainer 94 1 Bearing Lockwasher X
18 4 Bearing Retainer Hex Bolts 96 1 Bearing Locknut
19 2 Idlers XX 97 1 Bearing Spacer Set
20 2 Idler Cups XX 98 1 Balance Piston Housing

(Except 312 Size)
21 1 Thrust Plate XX 99 1 BP Housing O-ring (275 and

250 Only)

XX**

X

22 2 Thrust Spacers 100 1 Nilos Ring X

X = Minor Repair Kit Items. XX=Major Repair Kit Items. (Items marked (X) included in Major Repair Kit.)
XX* = Only required in 250 size major kit
XX** = Only required in 275 and 400 size major kit

H. PUMP MAINTENANCE

WARNING

Failure to observe precautions while installing, inspecting, and maintaining pump can
cause injury to personnel from accidental handling of liquids that may harm skin or
clothing, or fire hazard risks from flammable liquids, or injury from high pressure fluid jets.

DANGER

BEFORE working on equipment, make sure all power to equipment is disconnected and

locked-out.

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