5
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
1
st
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
4
th
Letter Designator
T – Carbide Seat
X – Special Material Or
Construction
3
rd
Letter Designator
S – Steel casing
T – Carbide Seat
X – Special Material Or Construction
2
nd
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.
