Gear Pumps ALP Series Installation and Running Information Pressure Definition Product tables show threemax. pressure levels (P1, P2 and P3) to which each pump can be used. P3 = peak max pressure. P2 = intermittent max. pressure. P1 = continuous 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: P3 P2 P1 t (sec) Max. 20 sec. Max. 2 sec. p(bar) Group ALP1 Size 2 3 4 5 6 7 9 11 13 16 20 Speed (rpm) 4000 3500 2500 2000 1500 Group ALP2 Size 6 9 10 12 13 16 20 22 25 30 34 37 40 50 Speed (rpm) 3000 2500 2000 1500 Group ALP3 Size 30 33 40 50 60 66 80 94 110 120 135 Speed (rpm) 2500 2000 1500 1000 Group ALP4 Size 130 160 190 220 250 270 300 Speed (rpm) 2000 1500 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. 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: Intake line 0.5 to 1.66m/s Delivery line 2 to 6m/s Return line 1.6 to 3m/s www.jbj.co.uk/gear-pumps.html #DriveLineHarmony 10
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