Gear Pumps ALP Series Installation and Running Information 10 www.jbj.co.uk/gear-pumps.html #DriveLineHarmony P2 = intermittent max. pressure. Pressure diagramas a function of time. P1, P2 and P3 values can be attained only if systemdoes not go over the following rotation speeds: P1 = continuous max. pressure. Product tables show threemax. pressure levels (P1, P2 and P3) to which each pump can be used. P3 = peak max pressure. Pressure Definition P3 P2 P1 t (sec) Max. 20 sec. Max. 2 sec. p(bar) Speed (rpm) 4000 3500 2500 2000 1500 Group ALP1 Size 2 3 4 5 6 7 9 11 13 16 20 Size 30 33 40 50 60 66 80 94 110 120 135 Speed (rpm) 2500 2000 1500 1000 Supply &Delivery Lines Hydraulic systempipes should show no sudden changes of direction, sharp bends and sudden differences in cross-section. They should not be too long or out of proportion. Pipe cross-section should be sized so that fluid velocity does not exceed recommended values. It is advisable to carefully consider the possible diameter reduction of the inlet or outlet pipes fitted on flange fittings. Reference values are the following: Speed (rpm) 2000 1500 Size 6 9 10 12 13 16 20 22 25 30 34 37 40 50 Group ALP4 Please contact jbj Techniques technical department, email: info@jbj.co.uk or telephone: +44 (0)1737 767493 for system operating conditions other than indicated in the product tables. Intake line 0.5 to 1.66m/s Delivery line 2 to 6m/s Return line 1.6 to 3m/s Speed (rpm) 3000 2500 2000 1500 Group ALP2 Group ALP3 Size 130 160 190 220 250 270 300
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