IMO *G3D-187, Instruction Manual

Page: 6 / 36

6
D. PUMP MODEL IDENTIFICATION
This instruction manual covers Imo Series G3D-275 pumps. The model of each pump is identified on pump
nameplate. Refer to figure 1 and table 1 for instructional keys when using this manual.
Figure 1. Definitions of Model Designators
1 If you cannot positively identify your pump assembly in this book, contact Imo Pump's service department
for assistance. Have pump model and serial number to assist in identification.
2 See Figure 26 for variations of pump inlets that might apply to your pump type.
3 See Figure 25 for variations of pump inboard cover/seal arrangements that might apply to your pump
type.
4 See Seal Figures 2 through 10 for seal assembly variations as applicable to your pump type.
E. ORDERING INSTRUCTIONS
When corresponding with Imo Pump regarding Series G3D-275 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.
Basic Pump Modifiers
A - Design Modification
C - Cyclic Service
D - Dampening Groove
E - 300# ANSI Inlet Flange
G - O-ring Inlet Head
H - Special Discharge Flange
LA - Dalic Plated Housing
G - Design Modification
Series
1st Letter Designator (Seal Design)
B - Rubber Bellows
(Buna Fitted, Std. Bearing)
F - Standard Packing
G - Crane Type 9B3
(Viton Fitted, Hi-Temp. Bearing)
H - Positive Drive (Viton O-Ring Fitted,
Hi-Temp. Bearing)
J - Crane Type 2 (Std. Bearing)
N - Borg Warner Type BX (Viton Fitted,
Hi-Temp. Bearing)
Q - Flexibox (Viton Fitted, Std. Bearing)
S - Sealol (Viton Fitted, Hi-Temp. Bearing)
U - Borg Warner Type BX (Viton Fitted, Std. Bearing
W - Crane Type 21 (Viton Fitted, Std. Bearing)
W - Hi Temperature Packing
Y - Borg Warner Type BX
(Neoprene Fitted, Std. Bearing)
Rotation
Blank = CW
D = CCW
Rotor Size
187 through 312
4th Letter Designator
J - Silicon Carbide Seat
T - Tungsten Carbide Seat
X - Special Material or Construction
3rd Letter Designator
C - Neoprene O-rings
J - Silicon Carbide Seat
R - No Inlet Head
S - Steel Casing
T - Tungsten Carbide Seat
U - Stellite Seal Seat
X - Special Material or Construction
2nd Letter Designator
C - Circular Mounting Flange
F - Foot Mount
H - Special Mounting Flange
J - Silicon Carbide Seat
R - Straight-thru Inlet
S - Steel Casing
T - Tungsten Carbide Seat
X - Special Material or Construction
X G 3D X X X X XXX X