Circor IMO 3220/523, Product Service Manual

Page: 5 / 14

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F.2 OPERATING LIMITS
CAUTION ATTENTION
Operating conditions, such as speed, fluid viscosity, temperature inlet pressure, discharge
pressure, filtration, duty cycle, drive type, mounting, etc., are interrelated. Due to these
variable conditions, specific application limits may be different from that of operational
limitations. Equipment must not be operated without verifying system’s operating
requirements are within pump’s capabilities.
Under no circumstances are following operating limits (specified in Table 1) to be exceeded without
specific approval from Imo Pump.
Table 1 – Normal Pump Operating and Structural Limits
MAXIMUM SPEED ...................................................................................................... 2500 RPM
VISCOSITY ........................................................ 1 cSt Minimum – 3000 SSU (650 cSt) Maximum
MINIMUM – MAXIMUM LIQUID TEMPERATURE ................................. 0 to 275°F (-18 to 135 C)
*
MAXIMUM INLET PRESSURE ........................................................................................ 150 psig
MAXIMUM DISCHARGE PRESSURE .............................................. 2200 psig, Continuous Duty
FILTRATION ......................................................... (See General Instruction Manual, SRM00046)
DRIVE .............................................................................................................................. Direct Only
MOUNTING .................................................................... Foot or Flange Mounted in Any Attitude
* See instructions below for running over 200°F
F3. High Temperature Operation (Above 200°F (93°C)
For high temperature operation, Imo recommends:
1. Use a spacer double disk type coupling (Thomas DBZ-C or equivalent) to eliminate need
for hot alignment.
2. Insulate pump case per Figure 1, except ball bearing area, to keep temperature of all
components approximately the same.
3. Torque down rear feet of pump per instructions with flat washer and spring washer to allow
foot of case to float as case expands with high temperature. See Figure 2. Front feet
should be torqued to approximately 200 lb-ft with no washer or Loctite required.