Gear Pumps Micro Series Installation and Running Information 10 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) www.jbj.co.uk/gear-pumps.html #DriveLineHarmony Group 0.25 0.5 Size 18 24 30 36 48 60 0.5 0.75 1.0 1.3 1.6 2.0 Min. Speed (rpm) 3000 2500 2000 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 1.6m/s Delivery line 2 to 6m/s Return line 1.6 to 3m/s
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