Flowserve ESP3 - Manual (Page 16)

ESP3 USER INSTRUCTIONS ENGLISH 26999943 08-11
Page 16 of 64
Figure 3-8: Engineering information
Pump Group Size
GP1 – 1E GP2 – 2E GP3 – 3E
Ball Bearing Size 7308 7310 7313
1
st
Critical Speed @ 3550 span 6000 5555 n.a.
1
st
Critical Speed @ 1750 span 2344 2469 2833
1
st
Critical Speed @ 1180 span 2344 2469 2833
Std. Bearing Span @ 3550 rpm 760 mm (30 in.) 915 mm (36 in.) n.a.
Std, Bearing Span @ 1750 rpm 1220 mm (48 in.) 1220 mm (48 in.) 1520 mm (60 in.)
Standard Bearing Span @
1180 rpm
1220 mm (48 in.) 1220 mm (48 in.) 1520 mm (60 in.)
Shaft Diameter @ Sleeve
Bearing
28.58 mm (1.125 in.) 38.10 mm (1.500 in.) 53.98 mm (2.125 in.)
Shaft Diameter @ Stuffing Box 28.58 mm (1.125 in.) 38.10 mm (1.500 in.) 47.63 mm (1.875 in.)
Shaft Diameter @ Coupling 25.4 mm (1.000 in.) 34.93 mm (1.375 in.) 41.28 mm (1.625 in.)
Keyway Size mm (in) 6.4 x 3.2 (1/4 x 1/8) 7.9 x 4.0 (5/16 x 5/32) 15.9 x 7.9 (5/8 x 5/16)
Nominal Impeller Clearance .46 mm (0.018 in.) .46 mm (0.018 in.) .64 mm (0.025 in.)
Corrosion Allowance 3.2 mm (0.125 in.) 3.2 mm (0.125 in.) 3.2 mm (0.125 in.)
Minimum Pit Depth .61 m (2.0 ft) .61 m (2.0 ft) .91 m (3.0 ft)
Maximum Pit Depth 6.10m (20.0 ft) 6.10 m (20.0 ft) 6.10 m (20.0 ft)