Flowserve FRBHJC - Manual (Page 12)

FRBHJC USER INSTRUCTIONS ENGLISH 71569179 11-04
Page 12 of 36
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3.3.6 Driver
The driver is normally an electric motor driving via
couplings, belts, gearboxes, drive shafts etc.
3.3.7 Accessories
Accessories may be fitted when specified by the
customer.
3.4 Performance and operating limits
This product has been selected to meet the
specifications of your purchase order see section 1.5.
The following data is included as additional information
to help with your installation. It is typical, and factors
such as temperature, materials, and seal type may
influence this data. If required, a definitive statement
for your particular application can be obtained from
Flowserve.
3.4.1 Operating limits
Pumped liquid temperature limits
up to+177 ºC (350 ºF)
Maximum ambient temperature up to +50 ºC (122 ºF)
Maximum soft solids in suspension up to 7 % by volume
Maximum pump speed Refer to the nameplate
3.4.2 Speed torque curves
To bring a centrifugal pump up to rated speed, the
driver must be capable of providing more torque at
each speed than required by the pump. The margin
between the available and required torque affects the
time it takes the unit to reach full speed. If the torque
required by the pump exceeds the torque capability of
the drive at any run-up speed, the unit will not
accelerate to full speed. Normally, this is not a problem
with standard induction or synchronous motors
provided the proper voltage is supplied at the motor.
For pumps started at shut valve conditions, 100 percent
full speed torque can be calculated by using the
formula:
Torque (Nm) = 9545 Shutoff Power (kW)
r/min
Torque (lbfx ft) = 5250 Shutoff Power (hp)
r/min
Torque required by the pump at any other speed during
start-up can be determined from the curve above. Note
that the driver manufacturer usually bases 100 percent
torque on the design power of the driver and
consequently the speed-torque curves should be
plotted in torque units (e.g. Nm) instead of percentage
torque to avoid confusion.
3.4.3 MAXIMUM WORKING PRESSURES -bar (psi).
CONSTRUCTION CAST IRON AND C.I.S.S. FITTED
STAINLESS STEEL
316,317L, WORTHITE, ETC.
TEMPERATURE
O C ( O F)
UP TO 12”
DISCHARGE
14 TO 16”
DISCHARGE
18 TO 20”
DISCHARGE
UP TO 16”
DISCHARGE
18 TO 20”
DISCHARGE
-30 to 38 (-20 to10 0) 10.3 (150) 10.3 (150) 6.2 (90) 13.8 (200) 8.3 (120)
65 (150) 10.3 (150) 9.7 (140) 6.2 (90) 13.8 (200) 8.3 (120)
95 (200) 10.3 (150) 9.3 (135) 6.2 (90) 13.4 (195) 8.3 (120)
120 (250) 10.3 (150) 9.0 (130) 6.2 (90) 12.6 (185) 8.3 (120)
150 (300) 12.1 (175) 8.3 (120)
175 (350)
CONSULT FACTORY FOR APPLICATIONS IN THIS RANGE.
CASTIRON NOT RECOMMENDED DUE TO THERMAL SHOCK RISKS.
11.0 (160) 7.6 (110)