Gear Pumps

2 Plain bearing bushes Description Gear pumps KF are used for pumping a wide variety of fluids. Gear pumps KF are distinguished especially by their wide range of variants which are assembled as required on the modular principle and also permit subsequent upgrade. The standard housing sections are of grey cast iron. The gear units are manufactured from high-strength case-hardening steel, hardened and mounted in special multi-compound plain bearing bushes. The standard drive shaft is sealed by single radial lip-type seal. All pump sizes incorporate helical tooth system. This feature, combined with...

• Sealing of the drive shaft: – Single radial lip-type seal – Double radial lip-type seal (Quench) – Mechanical seal • Outboard bearing to take up input drive-side radial load Connecting flanges Couplings Bell housing Quench tank Attenuation elements Special Design Various shafts ends and gear units, as well as flange mounted versions, bearing alternatives, multi-stage pump combinations for your special application are available on request. Our Sales engineers will be pleased to advise you. Direction of Rotation The following should be note for direction of rotation: • when looking at the pump...

Materials Housing and cover Plain bearing bushes DU (multi-layer friction-type bearings P 10, DP 4) Bearings free of nonferrous metal on request Shaft seals Single radial lip-type seals: NBR, FKM, PTFE, EPDM Mechanical seal: Metal-impregnated carbon /SiC, FKM, CrNi-Steel NBR, FKM, EPDM, FEP with FKM-core Characteristics Nominal sizes Mounting position KF ... R/L/B ... without Quench optional KF ... R/L/B ... with Quench horizontal, Quench connection above right or left right and left for reciprocal operation (Continuous operation on request) Flange connection Housing connection KF 730 / KF 1000...

Working Pressure Shaft seals standard operation Sealing material Single radial lip-type seal Outboard bearing with single radial lip-type seal Double radial lip-type seal with connection possibility for quench Mechanical seal Shaft seals vacuum operation Sealing material Double radial lip-type seal for vacuum operation with connection possibility for quench short term during start-up status: -0.6 bar Working pressure suction side pe [bar] pressure side pb [bar] The indicated maximum values are dependent upon the remaining working conditions. Note vacuum operation: The tank installation must be...

Variants Shaft End Seals Pump with single radial lip-type seal Sealing materials: NBR = sealing type 1 FKM = sealing type 2 PTFE = sealing type 3 EPDM = sealing type 9 FKM = sealing type 18 Pump with outboard bearing and single radial lip-type seal Sealing materials: NBR = sealing type 1 FKM = sealing type 2 PTFE = sealing type 3 EPDM= sealing type 9 FKM = sealing type 18 Pump with mechanical seal Pump with double radial lip-type seal for vacuum operation with connection possibility for quench Sealing materials: NBR = sealing type 19 FKM = sealing type 7 PTFE = sealing type 4 EPDM = sealing type...

KF 730 ... 1500 noise optimized for medias with increased air percentage The noise optimized pumps in the KF series are designed for conveying for medias with increased air content, predominantly for use as lubricating oil pumps in gears. Special measures prevent the otherwise normally increased noise present in auriferous gear oil. The noise levels do not exceed or only barely exceed the measurements with non-auriferous oils. Also, there is no noise spectrum shift to higher, unpleasant frequencies. In applications without auriferous portions in the media, it is not recommended to use this version...

Type Key (Ordering example) · Housing and cover material not specified GJS Pressure valve DVB 3 … 25 bar (Pressure relief valve*) DVR 3 … 12 bar (Pressure control valve*) * see also related datasheet pressure valves DV Type of seal see below Mounting F SAE D 4-hole flange without outboard bearing G SAE D 4-hole flange with outboard bearing Direction of rotation R L B right left right and left for reciprocal operation (Continuous operation on request) Nominal size 730 / 1000 / 1250 / 1500 Product name Single radial lip-type seal NBR (BABSL) Single radial lip-type seal FKM (BAUMX7) Single radial...

Technical Data Nominal size geom. displacement Working pressure Maximum pressure (pressure peak) pb max Sound pressure level dB (A) Perm. radial force (3) (n = 1500 1/min) Comply with media-specific properties. Pay attention to the viscosity. Outside forces are only permissible in combination with an outboard bearing. Fradial on central shaft end. pb = 20 bar For certain working conditions, the minimum or maximum characteristics should not be used. Sound level measured in dB(A) at 1 m distance For example, the max. working pressure is not permissible in combination with low speed and low viscosity....

Discharge Flow / Input Power Notes: - The ratings refer to a mineral oil with a viscosity of 34 mm2/s. - Margin of error for the flow Q + 2.5% ... -5% of the tabular value. - For viscosity < 30 mm2/s take a reduction of the rated flow Q into account. - The output of the drive motor should be selected 20% higher than tabular value P. - For viscosity > 100 mm2/s, an increase in the required power is necessary, in this case proceed as per description on page 11. - -3% of discharge flow for the noise-optimized version. 10 KRACHT GmbH · Gewerbestr. 20 · 58791 Werdohl, Germany · Phone +49 23 92.935-0...

Calculation of input power Calculation P1Pu = Ptab P1Pu = Example: Pump type KF 1500 n 1450 Viscosity Working pressure at pump power consumption [kW] power consumption per table [kW] bei 1450 1/min speed (1/min) dependent on viscosity! (see speed recommendation) kW viscosity factor l/min (see diagram) discharge flow [l/min] with Q = P1Pu = 31.2 kW Motorpower output: Select helical geared motor with Drehzahl Speed Viscosity Viskositätsfaktor Diagramm: n f ν = f (ν) Note: To determine the power consumption always take the max. working viscosity at starting state into consideration. The power of...