Flowserve Twin Screw Rotary User Manual
Page 22
TWIN SCREW PUMPS. ORIGINAL USER INSTRUCTIONS. ENGLISH. 71569243 – 07/10
Page 19 of 53
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PUMP SIZE
NP24
MODEL INTERNAL
BEARING
EXTERNAL
BEARING
SHAFT/SCREW DESIGN
PINNED
INTEGRAL PINNED INTEGRAL
SUCTION SIZE (STD)
14” 150# FLANGED
DISCHARGE SIZE (STD)
12” 300# FLANGED
CLEARANCES (STD)
.51/.76 mm (.020/.030”)
PUMP
3855
(8500)
4536(10000)
WEIGHTS
KG(LBS)
ROT ELEMENT
1179 (2600)
1247 (2750)
MOMENT OF INERTIA (LBS/IN2)
23800
24900
SHAFT DIA @ COUPLING
92.1 mm (3.625”)
92.1 mm (3.625”)
SHAFT DIA @ ST BOX
95.3 mm (3.750”)
146.1 mm (5.750”)
BORE
120.7 mm (4.750”)
171.5 mm (6.750”)
STUFFING
BOX
DEPTH
120.7 mm (4.750”)
114.3 mm (4.500”)
NO OF STUFF BOXES
1
4
SIZE
12.7 mm (1/2)sq
12.7 mm (1/2)sq
PACKING
NO
OF
RINGS
8 28
TIMING GEAR HSG
N/A
N/A
21 L
21 L
APPROX.
OIL FILL
BEARING HSG SEE
NOTE 1
N/A
N/A
8.5 L
8.5 L
PUMP SIZE
NP18
MODEL INTERNAL
BEARING
EXTERNAL
BEARING
SHAFT/SCREW DESIGN
PINNED
INTEGRAL PINNED INTEGRAL
SUCTION SIZE (STD)
14” 150# FLANGED
DISCHARGE SIZE (STD)
12” 300# FLANGED
CLEARANCES (STD)
.51/.76 mm (.020/.030”)
PUMP
3629 (8000)
4309 (9500)
WEIGHTS
KG(LBS))
ROT ELEMENT
1111 (2450)
1168 (2575)
MOMENT OF INERTIA (LBS/IN2)
23150
24250
SHAFT DIA @ COUPLING
92.1 mm (3.625”)
92.1 mm (3.625”)
SHAFT DIA @ ST BOX
95.3 mm (3.750”)
146.1 mm (5.750”)
BORE
120.7 mm (4.750”)
171.5 mm (6.750”)
STUFFING
BOX
DEPTH
120.7 mm (4.750”)
114.3 mm (4.500”)
NO OF STUFF BOXES
1
4
SIZE
12.7 mm (1/2)sq
12.7 mm (1/2)sq
PACKING
NO
OF
RINGS
8 28
TIMING GEAR HSG
N/A
N/A
21 L
21 L
APPROX.
OIL FILL
BEARING HSG SEE
NOTE 1
N/A
N/A
8.5 L
8.5 L
Note 1. Depending on whether the pump is a front or rear timing gear style, the bearing housing may be on the
onboard or outboard side of the pump.