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A. GENERAL INSTRUCTIONS
The instructions found herein cover the disassembly, assembly and parts identification of CIG mechanical
seal double 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 Imo General Installation Operation,
Maintenance, and Troubleshooting Manual, (No. SRM00046), provided with your order. For further
d e t a i l e d information and technical assistance please refer to Imo Pump, Technical/Customer Service
Department, at (704) 289-6511.
This manual cannot possibly cover every situation connected with the installation, operation, inspection, and
maintenance of the equipment supplied. Every effort was made to prepare the text of the manual so that engineering
and design data is transformed into the most understandable wording. Imo Pump must assume the personnel
assigned to operate and maintain the supplied equipment and apply this 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 CIG single mechanical seal double pumps. This series of pumps has been designed
for use in hydraulic, lubricating seal and fuel 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
The CIG mechanical seal double pumps are positive displacement, internal gear pumps consisting of a single shaft
that runs through the center of pump housings. This shaft drives the external gears (pinion gears) which in turn
drives the internal gears (ring gears). Fluid is carried between the internal and external gear teeth of each pump
and is discharged as the teeth mesh. The pinion and ring gears are separated in each pump by a crescent which
is a sealing element in the pump between inlet and discharge ports.
