German KRACHT gear pumps in stock
$144.56
KF20RF2-D15 In addition to its self-priming capability and the fact that flow rate is independent of discharge pressure, the KRACHT gear pump has no suction or discharge valves on the pump casing. It features a simple structure, uniform flow, and reliable operation. However, it is inefficient, noisy, vibrates excessively, and is prone to wear. It is used to transport various non-corrosive oils without solid particles and possessing lubricating properties, typically at temperatures not exceeding 70°C, such as lubricating oils and edible vegetable oils. The typical flow rate range is 0.045~30 mS/h, the pressure range is 0.7-20 MPa, and the operating speed is 1200-4000 r/min.
Brand
KRACHT/Germany KRACHT
KRACHT Gear Pump KF20RF2-D15 in Stock
KRACHT gear pumps are rotary pumps that transport or pressurize liquids by changing and moving the working volume between the pump cylinder and meshing gears. They consist of two gears, a pump body, and front and rear covers forming two enclosed spaces. When the gears rotate, the volume of the space on the disengaged side increases, creating a vacuum that draws in liquid. Conversely, the volume of the space on the meshing side decreases, forcing the liquid into the pipeline. The suction and discharge chambers are separated by the meshing line of the two gears. The pressure at the pump outlet depends on the resistance at the outlet.
The concept of a KRACHT gear pump is simple: its most basic form consists of two identical gears meshing and rotating within a tightly fitted housing. The interior of this housing is shaped like an "8," with the two gears housed inside, their outer diameter and sides tightly fitted to the housing. Material from the extruder enters the space between two gears at the inlet, filling it. As the gears rotate, the material moves along the housing and is finally discharged when the two gears mesh.
Technically, a gear pump is also called a positive displacement device, much like a piston in a cylinder. When one gear enters the fluid space of another gear, the liquid is mechanically squeezed out. Because liquid is incompressible, the liquid and the gears cannot occupy the same space at the same time, thus the liquid is expelled. This phenomenon occurs continuously due to the constant meshing of the gears, providing a continuous discharge at the pump outlet; the discharge volume is the same per revolution. With the continuous rotation of the drive shaft, the pump continuously discharges fluid. The pump flow rate is directly related to the pump speed.
In reality, there is a small amount of fluid loss within the pump, preventing it from reaching 100% efficiency. This is because the fluid is used to lubricate the bearings and gear sides, and the pump body cannot be perfectly flush, so a small amount of fluid loss is inevitable. However, the pump still operates well, achieving 93%–98% efficiency for most extruded materials.
For fluids whose viscosity or density varies during the process, this type of pump is not significantly affected. If there is a damper, such as a filter or restrictor on the outlet side, the pump will force the fluid through them. If this damper changes during operation—that is, if the filter becomes dirty or clogged, or the back pressure of the restrictor increases—the pump will still maintain a constant flow rate until it reaches the mechanical limit of the weakest component in the unit (usually equipped with a torque limiter).
There is a practical limitation to the speed of a pump, which depends primarily on the process fluid. If the fluid being extruded is an oil, the pump can rotate at very high speeds, but this limitation is significantly reduced when the fluid is a high-viscosity polymer melt.
KRACHT Gear Pumps: Main Models:
High-Pressure Gear Pumps (Greater than 25 BAR): KP1/5.5, KP1/6.3, KP1/8, KP1/11, KP1/16, KP1/19, KP1/22, ACL 23, ACL 33, ACL 33 S, ACL 43, ACLD 23, ACLD 33, ACLD 33 S, ACLD 43, ACLD 23, ACLD 33, ACLD 33 S, ACLD 43, ACLD 53, ACLD 53S, ACLD 63
High-Pressure Gear Pumps, Low-Pressure Gear Pumps:
KP0/1-KP0/8, KP1/1.5-KP1/22, KP2/20-KP2/62 KP3/58-KP3/125, KP5/160—KP5/300, KF6/630H10BPOO7DP1-DKF6A16, etc.
Pressure reducing valves, directional valves, pressure valves:
HV/HVF, DBD 06, DBD 10, DBD 20, SPV/SPVF, etc.
Gear motors and motors:
KM1/5.5-KM1/22, KM1 with thermoelectric valve (fan), KM1 with thermoelectric valve and rotary switch (fan
Company Profile
We at KRACHT, a medium-sized, family-run business, are a globally active company with 250 employees working at the Werdohl based head office in Germany and another 80 members of staff in Budapest, Hungary.
As a manufacturer of transfer pumps, hydraulic motors, high pressure gear pumps, valves, pump units, gear type flow meter and electronics, we attach great importance to quality and to satisfy all our customers' requirements.
Whether it is a standard or special solution you are looking for. We are your competent business associates for hydraulic technology, talk to us.
History
Tradition meets innovation
KRACHT GmbH has been in business for close to 100 years. 100 years in which our engineers have pushed innovation forward and have influenced technical revolutions.
Concentrated expertise passed on through generations, a passion for movement and Identification with Corporate Values: This represents our staff and our success.
Low-Pressure Transfer Pumps:
KF 0/0.5---KF0/4, KF 1/4---KF1/24, KF 4---8, KF3/100---KF6/630, KF3/63-KF6/30, etc.
Flow Meters: (Gear Flow Meters, Turbine Flow Meters)
VC, VC12, VCA, VCN, VC, VCL, VC5F1PS, VC 0.4 F4PS M-04, etc.
Low-Pressure Transfer Gear Pumps: KF 0/0.5-KF0/4, KF 1/4-KF1/24, KF 4…80, KF 3/100-KF6/630, KF3/63-KF6/630 (Noise Optimized Type, BT/BH);
KRACHT Gear Pump Structural Features:
(1) Simple structure and low price;
(2) Low operating requirements and wide application;
(3) The end cover and the inter-tooth grooves of the gears form many fixed sealed working chambers, allowing it to be used only as a metering pump.
The gears adopt a new technology with international advanced levels of the 1990s—the double-circular arc sine curve tooth profile. Compared with involute gears, its advantages are that there is no relative sliding on the tooth profile surface during gear meshing, resulting in no tooth surface wear, balanced operation, no fluid trapping, low noise, long service life, and high efficiency. This pump breaks free from the constraints of traditional design, allowing gear pumps to enter a new era in design, production, and use.
The pump is equipped with a differential pressure safety valve for overload protection. The full backflow pressure of the safety valve is 1.5 times the rated discharge pressure of the pump. It can also be adjusted separately within the allowable discharge pressure range according to actual needs. However, this safety valve cannot be used as a pressure reducing valve for long-term operation; if necessary, it can be installed separately on the pipeline.
The pump shaft end seal design has two forms: mechanical seal and packing seal, which can be determined according to specific application conditions and user requirements.
KRACHT Gear Pump
