Circor IMO E12L Series Manuale utente

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PRODUCT SERVICE MANUAL

FOR

E12L SERIES PUMPS

WARNING

The Imo General Installation, Operation, Maintenance, and Troubleshooting

Manual, (No. SRM00046), along with this manual and 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. SRM00055 Rev. 06 (20-0051) February 2020

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

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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.

Noncompliance 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

SAFETY AND TABLE OF CONTENT……………..….............................................. A

A. GENERAL NSTRUCTIONS.......................................................................... 1

B. INTRODUCTION ......................................................................................... 1

C. DESCRIPTION OF THE PUMP ................................................................... 1

D. PUMP MODEL IDENTIFICATION ............................................................... 2

E. ORDERING INSTRUCTIONS ..................................................................... 2

F. OPERATION ................................................................................................ 3

G. PARTS LIST AND TORQUE TABLES .......................................................... 4

H. PUMP MAINTENANCE ............................................................................... 5-9

I. TROUBLESHOOTING ................................................................................. 10

J. FIELD AND FACTORY SERVICE AND PARTS ........................................... 10

A. GENERAL INSTRUCTIONS

Instructions found herein cover disassembly, assembly and parts identification of E12L 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 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 E12L Series Imo pumps. This series of pumps has been

designed for use in hydraulic, lubricating, and seal, applications requiring high inlet pressure

capabilities. 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

The E12L 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 MOEL IDENTIFICATION

This instruction manual covers the Imo Series E12L pumps with rotor sizes 118 through 200.

The model of each pump is identified on the pump nameplate. Refer to Figure 1 and Table 1 for

instructional keys when using this manual.

Table 1 – E12L Series Pump Models

Pump Model Number Assembly Figure Number

E12LYTFS-118

E12LYTFS-137

E12LYTFS-156

E12LYTFS-187

E12LYTFS-200

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Figure 1 – Model Designator Definitions

E 12L X X X X XXX

Design Modification

(Assigned by Imo)

Series

Seal Design

Rotor Size

-118, -137, -156,

-187, -200

Y = Type BXQW Case

S = Steel

Seal Seat Material Mounting

T = Carbide Seal Seat F = Foot Mounted

E. ORDERING INSTRUCTIONS

When corresponding with Imo Pump regarding Series E12L pumps, refer to the pump nameplate, this

instruction manual, and the assembly drawing as instructed below:

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

2. Record instruction manual number, revision and date.

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

4. From the assembly drawing or parts list (see Figures 3, 4, 5 andTable 3) provide the IDP number(s)

and names for the replacement part(s).

5. Give the above information to your Imo service representative.\

Imo sales and service representatives are listed herein and in Imo General Installation Operation,

Maintenance, and Troubleshooting Manual, SRM00046.

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F. O P E R AT I O N

F.1 LIQUID LIMITATIONS

Never operate with thin liquids such as solvents or water. The pump is designed for liquids

having the 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, the specific application limits may be different from that of the

operational limitations. This equipment must not be operated without verifying system’s

operating requirements are within the pump’s capabilities.

Under no circumstances are the following operating limits (specified in Table 2) to

be exceeded without specific approval from Imo Pump.

Table 2 – Normal Pump Operating and Structural Limits

MAXIMUM SPEED .............................................................. Rotor sizes 118 thru 156 4400 RPM Rotor

size 187 thru 200 3600 RPM

VISCOSITY .................................... 45 SSU (5.8 cSt) Minimum – 3000 SSU (650 cSt) Maximum

NOTE: Consult factory for allowable operating viscosities at specific speeds and pressures.

DO NOT alter design viscosity without prior consultation with Imo Pump.

MINIMUM – MAXIMUM LIQUID TEMPERATURE .............................. 0 to 250F (-18 to 121C) MAXIMUM

INLET PRESSURE......................................................................................... 200 psig

NOTE: Series 12L pumps are designed for positive inlet pressures. The unit should not be

operated for extended periods of time with inlet pressure less than atmospheric.

MAXIMUM DISCHARGE PRESSURE ............................. Rotor Size 118, 4000 psig, Cont. Duty

Rotor Sizes 137 thru 200 4500 psig, Cont. Duty

NOTE: Consult Imo Pump for 5000 psig operation

FILTRATION....................................................................(See Imo General Installation Operation, Maintenance,

and Troubleshooting Manual, SRM00046)

DRIVE...........................................................................................................................Direct only ROTATION

.................................................................................................Clockwise only facing pump shaft MOUNTING

..............................................................................................................Foot or Flange mounted in any attitude

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G. PARTS LIST AND TORQUE TABLES

Table 3 – Pump Parts List

IDP QTY DESCRIPTION KIT IDP QTY DESCRIPTION KIT

11Case 30 4Bolt

(

)

22E

ebolt

(

)

31 1Bearin

Nut XX

31Housin

XX 32 1Bearin

Washe

41Housin

XX 33 2Idle

Rotor

(

)

51Shim o

ace

XX 36 1Outboa

d Cove

62Back-u

Rin

(

)

X37 1Plu

72O-rin

)

X38 2Plate

Sub-

)

82Vent Pin

(

)

39 8Ca

Screw

(

)

91Sto

Pin 40 8Ca

Screw

(

)

10 1O-rin

X41 8D

na Seal

(

)

11 1Plu

42 4Lockwashe

Internal Teeth

12 1Inboa

d Cove

43 4Ca

Screw

(

)

13 1O-rin

X56 6Drive Screw

(

)

O-ring

Bal. Piston Bushin

Lockwasher(s) ***

ace

16 1S

ace

63 1S

rin

17 1Sto

XX 64 1S

ace

Sub-

18 8Ca

Screw

(

)

(

SEE NOTE

)

65 1S

ace

19 5O-rin

)

X66 1Trua

cRin

* XX

20 5Plu

)

66 2Ca

Screw

(

)

** XX

21 1Inlet Head 67 2Idle

Rotor

(

)

22 1Plu

70 1O-rin

23 1Powe

Roto

XX 71 1Set-Screw Cu

24 1Seal X72 3Drive Screw

(

)

25 1Trua

c Rin

)

X74 1LOCTITE X

27 1Ke

75 4Idle

Rotor

(

)

28 1Ball Bearin

XName

e Module

29 1Retaine

X = Minor Repair Kit Items.

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

* = For Rotor Sizes 118, 137 and 156

** = For Rotor Sizes 187 and 200

*** = For Rotor Size 118 Only

NOTE: If Nylok cap screws (18) are assembled/disassembled more than 5 times, Imo suggests

replacing with new Nylok cap screws.

Table 4 – Fastener Tightening Torque Values

IDP Number

ROTOR SIZE ASSEMBLY

.Numbe

TORQUE VALUE

(

lish

)

TORQUE VALUE

(

Metric

)

18 & 39 118 3 100 ±10 lb. ft. 135 ±14 Nm

18 & 39 137 & 156 4 160 ±10 lb. ft. 217 ±14 Nm

18 & 39 187 & 200 5 290 ±10 lb. ft. 393 ±14 Nm

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H. PUMP MAINTENANCE

WARNING

Failure to observe precautions while installing, inspecting, and maintaining the 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 the equipment is disconnected and

locked-out.

H.1 GENERAL COMMENTS

NOTE: Part number identifiers (IDPs) contained within parenthesis such as (10) refer to the circled

numbers shown on the assembly drawing. See Figure 3, 4 and 5, Tables 3 and 4.

H.2 TOOLS REQUIRED

The procedures described in this manual require common mechanics hand tools, a torque wrench,

dial indicator and suitable lifting device (such as) slings, straps, etc.

H.3 PUMP DISASSEMBLY

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

1, 5 and H.4, Steps 3, 4, 7 and 8 ONLY.

H. 4 Before starting pump disassembly perform the following:

a. De-energize driver.

b. Close all inlet and outlet valves.

c. Vent pressure from pump and drain pumping liquid.

d. Remove cap screws and lock washers from inlet and outlet flange fittings.

e. Remove any O-rings from inlet and outlet flange grooves.

f. Remove pump from driver by removing coupling hub and key (27) from power rotor (23)

shaft.

G. Remove pump from its mounting and locate on a suitable work bench.

NOTE: The Series E12L pumps incorporate highly finished precision parts that must

be handled carefully to avoid damage to critical machined surfaces. The parts removed

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

so that new parts, or the same parts, are properly replaced without damage.

CAUTION ATTENTION

Fluid leakage from disassembly of pump may make the floor slippery and can

cause personal injury.

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H. 5 Remove Outboard Cover (Suction Side) – See Figures 3, 4 and 5

Remove cap screws (40) with Dyna seals (41) from outboard cover (36). Pull out- board

cover slightly away from case (1) to release oil from inlet chamber of pump. Provisions must

be made for oil spillage. Rotate power rotor (23) in opposite direction from normal to drain

trapped fluid. Remove Dyna seals (41) from capped screws (40). Clean cap screws using

LOCTITE Gasket Eliminator 504. Remove outboard cover (36) with sub-assembly from inlet

head (21).

NOTE: The outboard cover (36) and sub-assembly consists of O-rings (14 & 19), plug (20),

plate sub-assembly (38) and cap screws (43) with lockwashers (42).

Remove cap screws (43) and lock washers (42) and plate sub-assembly (38) from

outboard cover (36). Remove O-rings (14 & 17) from grooves of outboard cover.

H. 6 Remove Inlet Head (Suction Side)

Remove cap screws (39) and washers (60) and inlet head (21) from case (1). Re- move O-

rings (13 & 19) from grooves in case (1).

H. 7 Remove Idler Rotors and Bearing Retainer

Remove idler rotors (67, 75 & 33) from bores of rotor housings (3 & 4) by rotating power rotor

in the opposite direction of normal rotation. This will unscrew and release the idler rotors from

the power rotor.

NOTE: Do not permit the idler rotors to drop as they emerge from housing (3).

Remove hex bolts (30) and bearing retainer (29) from inboard cover (12).

H. 8 Remove and Disassemble Power Rotor

Remove assembled power rotor (23) from pump. Disassemble power rotor assembly

(23) as follows:

a. Remove bearing nut (31) and washer (32).

b. Using a bearing puller or arbor press remove ball bearing (28).

c. Remove Truarc ring (25) from groove of power rotor (23).

d. Remove spacer sub-assembly (64). Removal of spacer sub assembly (64) includes

removal of spacer (62), spring pin (63) and mechanical seal stationary seat and O-ring

(1 & 2) of Figure 2.

e. Remove mechanical seal seat (1) and O-ring (2) of Figure 2 from spacer (62).

f. Loosen set-screws (see Figure 2, (3C)) and slide mechanical seal rotating assembly

(Figure 2, (3)) from power rotor (23).



6



Figure 2 – Mechanical Seal (24)



1. Seat

2. O-Ring

3. Rotating Assembly

3A. Bellows Assembly

3B. Bellows Assembly O-Ring

3C. Set Screw



H. 9 Remove and Disassemble Inboard Cover (Discharge side)

Remove cap screws (18) and (washers (60) 118 rotor size pump only) from inboard cover (12).

Insert two 1/2"-13" x 2" jacking bolts in inboard cover (12). Tighten jacking bolts evenly to

remove inboard cover from case (1). When cover removed from case remove jacking bolts.

NOTE: The inboard cover (12) removal includes removal of O-rings (70 & 7), back up ring (6),

balance piston bushing (15), stop (17), Truarc ring (66) or cap screws (66) and plug (20).



Disassemble the inboard cover (12) as follows:

a. Remove O-ring (70) from groove of inboard cover (12). Remove O-ring (7) and back-up

ring (66) from groove of inboard cover (12).

b. For rotor sizes 118 to 156 – Remove Truarc ring (66) from groove of inboard cover

(12).

c. For rotor sizes 187 and 200 – Remove cap screws (66) from stop (17).



d. Remove stop (17) and balance piston bushing (15) from inboard cover (12).

Remove O-rings (19) from grooves of case (1).

For rotor sizes 137 to 200 – Remove spacer (16) from case (1). Remove spacer (16) from

case (1).

For rotor sizes 137 and 187 – Remove spacer (65) from case (1).

Remove plug (11) with O-ring (10) from case (1). Remove stop pin (9) from case (1)

by threading a 1/4”-20" x 2 1/2” bolt into bore of case and pulling stop pin from case.

CAUTION ATTENTION.

DO NOT drop housings as they emerge from case.

e. Remove housings (3 & 4) from case (1). Separate housings (3 & 4) and remove vent pins

(8).

f. Remove O-ring (7) and back-up ring (6) from groove of housing (4).

Indice

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