Circor IMO A3D Series - Page 4

STRUCTURAL LIMITS
Operating conditions such as speed, fluid viscosity, inlet pressure, temperature, filtration, duty cycle,
mounting, drive type, etc. are interrelated. Due to variable conditions, specific application limitations may
vary from structural limitations. Equipment must not be operated without verification that operating
requirements are within published capabilities as shown in appropriate pump brochure (available from local
Imo Pump Division offices and representatives listed in Manual SRM000
Under no circumstances are the following structural limitations to be exceeded
Maximum Speed (Rpm)
Rotor Size Distillate Oils Lube & Seal Oil Residual & Crude Oils
Type B & H Type B & H Type F Type B & H Type F
106-118 5000 5000 3800 1800 1800
137 4400 4400 3200 1800 1800
156 4400 4400 3000 1800 1800
275 3000 3000 1900 1800 1800
337 to 400 2500 2500 - 1800 1800
Condition Limit
Minimum Viscosity 32 SSU
Maximum Viscosity (figure 1)
1
st
Letter Designator F 100 SSU Minimum
1
st
Letter Designator B 33 SSU Min / 2500 SSU Max
1
st
Letter Designator H 33 SSU Min / 15000 Max
Minimum Liquid Temperature 0°F
Maximum Liquid Temperature (figure 1)
1
st
Letter Designator F 230°F
1
st
Letter Designator B 180°F
1
st
Letter Designator H 220°F
Maximum Inlet Pressure
75 psig for sizes137 thru 250
50 psig for sizes 275 and larger
10 Psig for Packing Pumps
Maximum Discharge Pressure (Continuous Duty) 500 psig
Filtration Refer to General Instruction Manual, SRM000
Drive
Direct or Belt For Seal Pumps Direct Only for
Packing Pumps
Mounting Mounted in any attitude
ORDERING INSTRUCTIONS
All correspondence pertaining to renewal parts for Series A3D pumps must refer to this instruction manual
number and should be addressed to the nearest Imo Pump Division representative listed in SRM00046.
The following directions should be followed for renewal part orders:
1. Give number of this instruction manual.
2. Give pump type and serial number of pump for which part(s) is ordered.
3. Give figure number(s) on which pump type and sealing design part(s) is shown.
4. Give part number(s) for necessary part(s).