Gear Pumps GHP Series Installation and Running Information 10 www.jbj.co.uk/gear-pumps.html #DriveLineHarmony Pressure diagramas a function of time. P1, P2 and P3 values can be attained only if systemdoes not go over the following rotation speeds: Pressure Definition Product tables show threemax. pressure levels (P1, P2 and P3) to which each pump can be used. P3 = peak max pressure. P1 = continuous max. pressure. P2 = intermittent max. pressure. P3 P2 P1 t (sec) Max. 20 sec. Max. 2 sec. p(bar) Intake line 0.5 to 1.66m/s Speed (rpm) 2500 2000 1500 Speed (rpm) 2000 1500 1000 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. Group GHP2 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: Size 30 33 40 50 60 66 80 94 110 120 135 Return line 1.6 to 3m/s Size 2 3 4 5 6 7 9 11 13 16 20 Size 6 9 10 12 13 16 20 22 25 30 34 37 40 50 Group GHP3 Group GHP1 Speed (rpm) 3500 3000 2000 1500 Supply &Delivery Lines Delivery line 2 to 6m/s
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