Graham 1 Series User Manual

Graham Corporation
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B) Non-Gasketed Pumps
Size 30000, 40000, and 50000 Cast Iron pumps do not require gaskets, but use a joint sealing
compound between the impeller casings and the end plates. They are machined to accommodate
the same impeller end clearances as a gasketed pump.
6.3 Tie Rod Torque Values
Table 5 includes torque values for re-assembling the pumps.
Pump Frame
Size
Tie Rod Torque *
30000 40 ft.-lbf
40000 40 ft.-lbf
50000 40 ft.-lbf
60000 70 ft.-lbf
70000 90 ft.-lbf
80000 250 ft.-lbf
90000 300 ft.-lbf
* For units in N-m, multiply ft-lbs by 1.355
Table 5
6.4 Bearing Data
The correct bearing fit class needs to be used in order for proper operation. Do not use a C3
fit as it is too loose and will cause damage to the pump. Table 6 provides correct bearing
data for the pumps.
Pump
Frame Size
SKF Bearing
Number
Type Bearing Fit
Class
(Normal Fit)
Bearing Journal
Diameter & Tolerance
(µm)
Tolerance
Class
30000 6305/2RS1 Ball Bearing, Single AFBMA 0 25 mm, +15, +2 k6
40000 6306/2RS1 Row, Deep Groove, AFBMA 0 30 mm, +15, +2 k6
50000 6308/2RS1 Double Seals (SFL) AFBMA 0 40 mm, +18, +2 k6
60000 6310 Ball Bearing, Single AFBMA 0 50 mm, +18, +2 k6
70000 6314 Row, Deep Groove AFBMA 0 70 mm, +21, +2 k6
80000 22320 CC/W33 Spherical Roller Brng. AFBMA 0 100 mm, +0, -22 h6
90000 DE 23224 CC/W33 Spherical Roller Brng. AFBMA 0 120 mm, +0, -22 h6
90000 NDE 7224 BCBM Sngl. Row Ball Brng. (2) AFBMA 0 120 mm, +0, -22 h6
Table 6

Graham 1 Series Specifications

General

Brand	Graham
Model	1 Series
Category	Water Pump
Language	English