Accordingly to its configuration – the Design Principle is illustrated by the Sectional Figure – the KRACHT external gear type pump series KP1 is to be classified into the category of the so-called gland type bearing pumps. All essential functional parts as the gearing and the gland bearings are located in an aluminium housing (cast iron on request possible) manufactured of a high strength extrusion alloy which are closed on each side by an end cover or by a flange mounting cover respectively. The gearing of case hardening steel in surface hardened condition consists of the driving shaft pinion and the driven shaft pinion. Highest manufacturing quality is assured by grinding and honing of the tooth flanks. The surfaces of the journals are superfinished.
An important reduction of the type dependent deviation of the volumetric flow and of the pressure pulsation incident thereto was achieved on the basis of the great teeth number (z = 13) and of the specially shaped teeth. The gland bearings located on both sides of the gearing carry the journals in heavyduty multicomponent plane bearing bushes and contain additionally those sealing elements which serve for the pressure field sealing to compensate the axial clearance. If required the pumps can be supplied with a Pressure Relief Valve-Type DBD... – directly attached to the pump or with special valve arrangements assembled onto the pump instead of the end cover. Manifold pump combinations are available as well.