3
A. GENERAL INSTRUCTIONS
Instructions found herein cover disassembly, assembly and parts identification of all size CFHN series Imo 3-screw
pumps, sizes 20 through 330.
NOTE:
Individual contracts may have specific provisions that vary from this manual. Should any questions arise
which are not addressed in this manual, refer to contract and to Manual No.’s SRM00100 and SRM00101.
See front cover for manual descriptions. For additional information/technical assistance please contact
Technical Service Department of Imo Pump at (704) 289-6511.
Every effort was made to prepare text of manual so engineering and design data is transformed into most easily
understood wording. Imo Pump must assume personnel assigned to service pump have sufficient technical
knowledge and are experienced to apply sound safety and operational practices which may not be otherwise covered
by manual.
WARNING
If instructions in this manual 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 manual covers only CFHN series pumps. These pumps have been designed for general use in
lubricating, seal and distillate fuel oil applications. Size and construction of each pump is identified in
model number on pump nameplate. Definitions of model designators are identified in Figure 1.
Figure 1 – Model Designator Definitions
CFH N
020
R
46
K
C
/000
CFH
020
040
060
090
140
170
330
31
●
34
●
20
37
●
38
●
39
●
●
●
●
46
41
●
42
●
46
●
●
●
●
●
●
●
Size 20 Only: K = Axial Facing Inlet, M = Radial Facing Inlet
Example
Design Series
Size / Flow Rate Designator
Rotor Thread Pitch Angle (degrees)
C =
ISO
Flange Mount, F = Foot Mount
Special Option Designator
/000
This designator is not present for standard pump models
All Sizes Above 20: P = Axial Facing Inlet, S = Radial Facing Inlet
Design Sequence
N
Facing Drive Shaft: R = CW, L = CCW
Direction of Drive Shaft Rotation*
Inlet Port Configuration
Size / Flow Rate Designator
Rotor Thread
Pitch Angle (
°)
C F H N M o d e l N o m e n c l a t u r e
* R (CW) shaft rotation direction is considered "standard", however,
L (CCW) rotation is offered for all available combinations of size and
thread pitch angle.
N = 40 bar version
C
Mounting Configuration
R
K
All are SAE 4-bolt Mounting Pads - drilled & tapped for metric bolts
Note
All pumps models except Size 20 have weep holes that will readily allow for
detection and collection of any mechanical seal leakage that might occur.
Available Size & Thread Pitch Angle Combinations*
Содержание IMO CFHN Series
Страница 9: ...9 Figure 4 CFHN020 Pumps...
Страница 10: ...10 Figure 5 CFHN040 060 and 090 Pumps 10...
