Franklin 2007 ユーザーズマニュアル

Design And Operational Requirements

1.  Non-Vertical Operation: Vertical Shaft-up (0°) to 

Horizontal (90°) operation is acceptable as long as 
the pump transmits “down-thrust” to the motor within 
3 seconds after start-up and continuously during 
operation. However, it is best practice to provide a 
positive slope whenever it is possible, even if it is only 
a few degrees.

2.  Motor, Sleeve, and Pump Support System: The 

booster sleeve ID must be sized according to the 
motor cooling and pump NPSHR requirements. The 
support system must support the motor’s weight, 
prevent motor rotation and keep the motor and pump 
aligned. The support system must also allow for 
thermal axial expansion of the motor without creating 
binding forces.

3.  Motor Support Points: A minimum of two support 

points are required on the motor. One in the motor/
pump fl ange connection area and one in the bottom 
end of the motor area. The motor castings, not the 
shell area, are recommended as support points. If the 
support is a full length support and/or has bands in 
the shell area, they must not restrict heat transfer or 
deform the shell.

4.  Motor Support Material and Design: The support 

system shall not create any areas of cavitation or 
other areas of reduced fl ow less than the minimum 
rate required by this manual. They should also be 
designed to minimize turbulence and vibration and 
provide stable alignment. The support materials and 
locations must not inhibit the heat transfer away from 
the motor.

5.  Motor and Pump Alignment: The maximum 

allowable misalignment between the motor, pump, 
and pump discharge is 0.025 inch per 12 inches of 
length (2 mm per 1000 mm of length). This must be 
measured in both directions along the assembly using 
the motor/pump fl ange connection as the starting 
point. The booster sleeve and support system must 
be rigid enough to maintain this alignment during 
assembly, shipping, operation and maintenance.

6.  The best motor lubrication and heat resistance is 

obtained with the factory based propylene glycol 
fi ll solution. Only when an application MUST HAVE 
deionized (DI) water should the factory fi ll solution 
be replaced. When a deionized water fi ll is required, 
the motor must be derated as indicated on the below 
chart. The exchange of the motor fi ll solution to DI 

water must be done by an approved Franklin service 
shop or representative using a vacuum fi ll system 
per Franklin’s Motor Service Manual instruction. The 
motor shell then must be permanently stamped with a 
D closely behind the Serial Number.

The maximum pressure that can be applied to the 
motor internal components during the removal of the 
factory fi ll solution is 7 psi (0.5 bar.)

First: 

Determine maximum Feed Water Temperature 
that will be experienced in this application. If the 
feed water exceeds the maximum ambient of the 
motor, both the DI water derating and a hot water 
application derating must be applied.

Second:  Determine the Pump Load Multiplier from the 

appropriate Service Factor curve. (Typical 1.15 
Service Factor is for 60 Hz ratings &1.00 Service 
Factor for 50 Hz ratings).

Multiply the Pump Load Requirement times the pump 
load multiplier number indicated on the vertical axis 
to determine the Minimum Motor Nameplate Rating.

Fourth: 

Select a motor with a nameplate equal or higher than 
the above calculated value.

7.  Motor Alterations - Sand Slinger & Check Valve 

Plug: On 6" and 8" motors, the rubber sand slinger 
located on the shaft must be removed. The pipe plug 
covering the check valve must be removed from Ni-
resist and 316 SS motors. The special Booster motor 
already has these alterations made.

8.  Frequency of Starts: Fewer than 10 starts per 

24-hour period are recommended. Allow at least 20 
minutes between shutdown and start-up of the motor.

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