Circor G3D**-350 Series Bedienungsanleitung

PRODUCT SERVICE MANUAL

FOR

_G3D_ _-350 and 400 SERIES PUMPS

(Idler Cup and Hydrostatic Thrust Designs)

WARNING

The Imo General Installation Operation, Maintenance, and Troubleshooting Manual, (No.

SRM00046), as well as all other component manuals supplied with these type units

should be read thoroughly prior to pump installation, start-up, operation, maintenance or

troubleshooting.

Manual No. SRM00080 Rev. 04 (13-0321) September 2013

IMPORTANT NOTE

The importance of seal chamber priming cannot be overemphasized. Due to the

prevalence of seal damage and leakage caused by not filling the seal chamber with

liquid before putting a pump in service, this page is located at the beginning of this

document.

SEAL CHAMBER PRIMING

Fill mechanical seal chamber with liquid to insure seal does not start dry. This can be done by removing

seal vent set-screw and pouring liquid into vent passageway before opening pump inlet. Alternately,

seal chamber can be vented in situations where inlet pressure is above atmospheric by opening inlet and

discharge valves and then loosening seal vent plug to allow positive inlet pressure to push air out of seal

chamber until oil flows from it. See figure below.

Filling or Venting Seal Cavity Using Seal Vent

CAUTION

Failure to fill or vent seal chamber as described above may cause damage to seal running

faces which may result in seal leakage.

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

ATTENTION

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

could affect safety for

persons:

Safety instructions where

electrical safety is

involved are identified by:

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

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

Seal Chamber Priming…………………………………………………………………………………..2

Safety and Table of Contents......................................................................................................3

A. General Instructions..............................................................................................................4

B. Introduction...........................................................................................................................4

C. Description of Equipment......................................................................................................4

D. Pump Model Identification.....................................................................................................5

E. Ordering Instructions.............................................................................................................5

F. Operation..............................................................................................................................6

G. Parts List and Noise Levels.........................................................................................7 thru 8

H. Pump Maintenance and Seal Drawing .......................................................................8 thru13

I. Troubleshooting ..................................................................................................................14

J. Field and Factory Service and Parts....................................................................................14

K. Assembly Drawings.................................................................................................15 thru 18

A. GENERAL INSTRUCTIONS

Instructions found herein cover disassembly, assembly and parts identification of _G3D _-350 and 400

series pumps. Both original design with idler cups and newer design with hydrostatic idlers are covered

where applicable.

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 Imo General

Installation Operation, Maintenance, and Troubleshooting Manual,SRM00046, provided with

your order. For further detailed information and technical assistance please refer to Imo Pump,

Technical/Customer Service Department, at (704) 289-6511.

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.

WARNING

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.

B. INTRODUCTION

This instruction manual covers series _G3D_ _-350 and 400 Imo pumps. This series of pumps has been

designed for use in hydraulic, lubricating, seal, distillate, residual, fuel and crude oil applications. The

model and design construction of each pump can be identified by the designator code on the pump

nameplate. Definitions of model designators are identified in figure 1.

C. DESCRIPTION OF EQUIPMENT

_G3D_ _-350 and 400 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

Instruction manual covers Imo Series _G3D-350 and 400 pumps. Model of each pump is identified on

pump nameplate. Refer to figure 1 and table 1 for instructional keys when using manual.

Figure 1 – Model Designator Definitions

X G 3D X X X X 350 X

Basic Pump Modifiers -

A –Latest Mod

B –Hard Face Seals

E –High Vacuum Service

(300# ANSI Flange)

H –High Vacuum Service

(150# ANSI Flange)

Series

1st Letter Designator (Seal Design)

B –Rubber Bellows (Buna Fitted Std. Bearing)

H –Positive Drive (Viton O-ring Fitted, Hi-

Temp. Bearing)

K –Special Mounting, No Seal

N –Metal Bellows Seal Viton Fitted

X –Special Seal

Lead and Rotation

350 Rotor Size

Blank = 2D,CW D = 2D, CCW

G=1.8D, CW H = 1.8D, CCW

J=1.5D CW P = 1.6D CW

AN = 1.25D CW

400 Rotor Size

Blank = 2D,CW D = 2D, CCW

P=1.6D,CW AJ = 1.35D, CW

A=1.0D, CW

Rotor Size

350

400

4th Letter Designator

T –Carbide Seat

X –Special Material Or

Construction

3rd Letter Designator

S –Steel casing

T –Carbide Seat

X –Special Material Or Construction

2nd Letter Designator

C –Circular Mounting Flange

H –Special Mounting Flange

(Usually with previous letter K)

R –Axial Inlet

S –Steel Casing

T –Carbide Seat

X –Special Material Or

Construction

Design Modification

E. ORDERING INSTRUCTIONS

When corresponding with Imo Pump regarding Series _G3D_ _-350 and 400 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, SRM00046.

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.

F.2 OPERATING LIMITS

CAUTION

ATTENTION

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

Condition

Limit

Maximum Speed

2500 rpm

Minimum Viscosity

32 SSU

Maximum Viscosity (figure 1)

1st Letter Designator B

2500 SSU

1st Letter Designator H

15000 SSU

Minimum Liquid Temperature

0°F

Maximum Liquid Temperature (figure 1)

1st Letter Designator B

180°F

1st Letter Designator H

220°F

Maximum Inlet Pressure

50 psig

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

F3 Airborne Noise Levels (dBA) –

F3a – Measuring Conditions

•Distance to Pump = 1 Meter

•Operation = Cavitation Free

•Tolerance ± 3 dB

3D Airborne Levels

020 40 60 80 100 120 140 160

Horsepower

Airborne Noise Level (dBA)

Figure 2 – Airborne Levels

G. PARTS LIST Table 2 – _G3D_-350_ Pump Parts List

IDP

QTY

DESCRIPTION

KIT

IDP

QTY

DESCRIPTION

KIT

Case

Washer

Housing

Mechanical Seal**

Anti-Rotation Tube

Inlet

Tube O-rings

Washers (C-Face Only)

Housing/Inboard Cover O-

ring

Pipe Plug (Foot Mount Only)

Gasket (1 on C-Face)

Balance piston Bushing

(C-face pumps only)

Inboard Cover

Pipe Nipple (C-Face Only)

Hex Bolts

Pipe Coupling (C-Face Only)

Power Rotor

Tube Fitting (C-Face Only)

Snap Rings

Seal Spacer *

Spacer/Seal Seat Adapter

Tubing (C-Face Only)

Bearing

Housing Spacer

Key

Gasket (O-ring Seats Only)

Bearing Retainer

Fastener Seal

Bearing Retainer Hex Bolts

Pin Stop

Idlers

Balance Piston Housing

(Not C-Face)

Idler Cups (Idler Cup Design

Only)

90° Tube Fitting (C-Face Only)

Thrust Plate

Inlet O-ring

(Axial inlet pumps only)

Thrust Spacer

Washers (C-Face Pumps Only)

Hex Cap Screws

X = Minor Repair Kit Items.

XX = Major Repair Kit Items. (Items marked (X) are included in Major Repair Kit.)

* = Not used in “DKH” pumps.

Table 3 – _G3D_-400_ Pump Parts List

IDP

QTY

DESCRIPTION

KIT

IDP

QTY

DESCRIPTION

KIT

Case

Bearing Retainer

Inlet

Inboard Cover

Hex Bolt (Foot Mount Only)

Brg. Retainer Hex Bolts

Pipe Plug (Foot Mount Only)

Bearing Spacer

(J-Seat Seal and DKH Only)

Pin Stop

Bearing

Fastener Seal

Housing Spacer

Gasket (1 for C-Face)

Thrust Spacer

Idler

Thrust Spring Lock Washer

Balance Piston Housing

(Foot Mount Only)

Thrust Hex Bolt

Cups

Hex Bolts

Rotor Housing

Power Rotor

Seal

Pipe Plug (Steel Only)

Tube

Tubing (C Face Only)

Tube O-ring

Seal Seat Adapter

(O-ring Seat Seal only)

Housing & Inboard Cover

O-ring

Seal Gasket

Thrust Plate

Power Rotor Balance Piston

(C-Face Only)

Washers (8 on C-Face)

90° Tube Fitting

(C-Face Only)

Key

Inlet O-ring

(Axial inlet pumps only)

Seal Spacer*

Nuts (C-Face only)

Retaining Ring

X = Minor Repair Kit Items.

XX = Major Repair Kit Items. (Items marked (X) are included in Major Repair Kit.)

* = Not used in “DKH” pumps.

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.

H.1 GENERAL COMMENTS

NOTE: Part number identifiers (IDP) contained within parenthesis, such as (9), refer to circled

numbers shown in pump parts list Tables 2 and 3 and on assembly drawings (figures

3 through 7).

De-energize driver before starting with any maintenance action.

H.2 TOOLS REQUIRED

Procedures described in manual require common mechanics hand tools, a torque wrench, dial

indicators for alignment and a suitable lifting device such as slings, straps, etc.

H.3 PUMP DISASSEMBLY PROCEDURES:

NOTE: _G3D_-350_ and 400 pumps incorporate highly finished precision parts that must be

handled carefully to avoid damage to critical machined surfaces. Parts removed

should be tagged for identification and their exact positions in pump carefully noted so

new parts, or same parts, are properly replaced without damage.

CAUTION

Fluid leakage from disassembly of pump may make floor slippery and can cause personal injury

SPECIAL NOTE: To service mechanical seal and ball bearings ONLY perform H.3, Steps 1

through 5 and H.4, Steps 7thru 11 Only.

Determine pump model identification identified on pump nameplate to select applicable pump

assembly shown in Figure 4 through 7. Refer to that assembly for following instructions.

1. Close suction and discharge piping to pump. Vent pressure from pump. Disconnect

piping. Remove drain plugs (5 or 32) or seal tubing (35, 36, 57, 42, 71, 79) on C-face

pumps, and drain unit. Remove pump from driver, coupling and base plate. Remove

coupling hub and key (16 or 31).

2. Remove bearing retainer (17 or 43) from inboard cover (9 or 46) by removing bolts (18 or

47) (and lockwashers (30) if present).

3. Remove assembled power rotor (11 or 63) from inboard cover (9 or 46). Removal of

power rotor (11 or 63) includes removal of snap rings (13 or 42), ball bearing (15 or 49),

seal spacers (14 or 48), and mechanical seal (25).

4. Disassemble power rotor (11 or 63) as follows:

a. Using a flat nosed tool, such as a screw driver, remove snap rings (13 or 42) from

groove in power rotor (11 or 63) on both sides of ball bearing (15 or 49).

b. Sealed ball bearing (15 or 49) is assembled to power rotor (11 or 63) with light press

fit. Ball bearing (15 or 49) may be removed by using bearing puller or vertical arbor

press. When using press, place two pieces of key stock through openings of

mechanical seal seat adapter (14 or 48) underneath ball bearing (15 or 49) on both

sides of power rotor shaft. Key stock should be long enough to support power rotor

(11 or 63) as it is placed in press. Position press ram against power rotor (11 or 63)

coupling end face. Gently press power rotor (11 or 63) through ball bearing (15 or 49).

Ensure power rotor (11 or 63) does not fall to floor once ball bearing (15 or 49) is off of

its diameter.

c. If pump has no seal (DKH design in figure 4 or 6), power rotor disassembly is

complete. Remove spacer (14 or 48) and skip to step 6. If pump has mechanical seal,

proceed with step (d).

For steps (d thru g), refer to figure 3, mechanical seal drawing.

d. If stationary seal face is “J” type, remove spacer (14 or 48) and “J’ type stationary seal

seat from power rotor (11 or 63).

e. If seal is O-ring type, remove seal seat adapter (14 or 48) with stationary seal seat.

Remove stationary seat with O-ring from seal seat adapter (14 or 48). Discard O-ring.

f. If single spring, rubber bellows seal, remove rotating seat from shaft (11 or 63), If

multi-spring seal, disengage set screw and then remove rotating seal seat.

g. Remove spacer (38) from shaft.

5. Remove gasket (44 or 83) from inboard end cover (9 or 46).

6. Remove inboard cover (9 or 46) by removing bolts (10 or 4) or nuts (95) if Size 400, C-

face unit. Also remove washer (30 or 92) where applicable.

7. Remove and discard gasket (8 or 9) from inboard cover (9 or 46) or O-ring (6 or 28) if

pumps are C-face design.

8. On C-flange pumps ONLY, press bushing (33 or 86) from cover (9 or 46). Cover may

require heating to loosen Loctite before bushing (33 or 86) can be removed. Do not heat

to more than 250°F.

9. Remove inlet head (26 or 2) from case (1) by removing bolts (10 or 54) (and lockwashers

(92 or 30) if present). Remove and discard gasket (8 or 9) or O-ring (88) from inlet head

(26 or 2).

10. Remove thrust plate (21 or 29) and spacers (22 or 51) by removing bolts (23 or 53) and

lock washers (24 or 52)

11. If idler cup design, remove cups (20 or 23) from idlers (19 or 21).

12. Remove idlers (19 or 21) from housing (2 or 24) by unscrewing them from housing bores.

CAUTION

ATTENTION

Do not permit idlers (19 or 21) to drop as they emerge from housing (2 or 24).

13. Remove housing spacer (43 or 50) from case (1).

14. Remove pin stop (46 or 6) and fastener seal (45 or 7) from case (1).

15. If pumps are not C-face design, remove balance piston housing (47 or 22) with O-ring (6

or 28). This can be accomplished by pushing on suction end of housing (2 or 24) until

balance piston (47 or 22) emerges.

16. Remove and discard balance piston O-ring (6 or 28).

17. Remove tube (4 or 26) with O-rings (5 or 27) from housing (2 or 24) or balance piston

housing (47 or 22). Discard O-rings (5 or 27).

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