Brand: KRACHT

KRACHT KP Series High Pressure Gear Pump

Name: KRACHT KP High Pressure Gear Pump – Datasheet & Price Quote
Brand: KRACHT

Description

Overview

The KRACHT KP Series is a family of high pressure gear pumps with hydraulic axial clearance compensation. They are external gear pumps and are used mainly in oil hydraulic systems. KRACHT gives a displacement range of 1.4 to 300 cm³/rev and a maximum pressure of 300 bar (4,351 psi) for the series, with a media temperature range of -20°C to +150°C. The permitted pressure depends on the pump size and version, so the limit for each nominal size must be taken from the KRACHT catalog. The main components can take high dynamic loads, which makes the pumps insensitive to pressure peaks and continuous vibration.

Seven Star LLC, an industrial supplier in Muscat, sources the KRACHT KP Series gear pump on request for hydraulic equipment builders, maintenance teams and mobile equipment operators in Oman and the wider GCC. Lead time is confirmed at quotation.

Operating Principle of the KRACHT KP Series

The KRACHT KP Series works on the positive displacement principle. Two gear shafts, a driving shaft and a driven shaft, mesh inside a close-fitting housing. As they rotate, the fluid is carried in the tooth gaps along the housing wall from the suction side to the pressure side. The geometric displacement is delivered with each revolution, so the flow is proportional to speed. They may only be run in the direction of rotation specified for the pump, and dry running must be avoided.

Axial clearance compensation is what allows a gear pump to work at high pressure. In the KP pumps it is done by pressure plates or sliding plates beside the gear set. These have hydraulically pressurised pressure fields that close the axial gap at any operating pressure, regardless of viscosity. A high number of teeth, 13 or 14 depending on size, and a special tooth shape reduce flow fluctuation and pressure pulsation.

Engineering Design of the KRACHT KP Series

The catalog covers the sizes KP 1, KP 2, KP 3 and KP 5. KP 1 is available with a housing of high-strength extruded aluminium alloy or in grey cast iron. KP 2, KP 3 and KP 5 have housings and flange covers of cast iron. The gear set is made of case-hardened steel with ground tooth flanks. In the cast iron versions the ground bearing journals run in large-area PTFE-Pb coated bronze plain bearings on steel backs. The KP 5 has an outboard bearing at the shaft end to absorb radial and axial forces.

The drive shaft is sealed by a radial shaft seal in NBR or FKM. On request the pumps can be supplied with a directly flange-mounted pressure relief valve, and KRACHT also offers a version as a safety valve with TUV approval. Further options are an ATEX version, an outboard bearing and complete motor-pump units with electric or mechanical drive. Multiple pumps (KP plus KP, or KP plus KP plus KP) of the same or different sizes are possible, with hydraulically separated stages.

Key Features

The main points of the KRACHT KP Series high pressure gear pump, as published by KRACHT:

External gear pump design with hydraulic axial clearance compensation.
Displacement range of 1.4 to 300 cm³/rev across the series.
Maximum pressure up to 300 bar (4,351 psi), depending on size and version.
Media temperature range of -20°C to +150°C, depending on seal material.
High tooth count and special tooth shape for low flow fluctuation and pressure pulsation.
Housings in extruded aluminium alloy (KP 1) or cast iron, insensitive to pressure peaks and continuous vibration.
Optional pressure relief valve, also as a safety valve with TUV approval.
ATEX version, motor-pump units, outboard bearing and multiple pump combinations.

Industrial Applications

KRACHT names mobile and stationary plants, construction machinery, agricultural machinery, and municipal and special vehicles as the main fields of use for the KP Series. The pumps are suitable for hydraulic oil and engine oil. The catalog also lists HEES bio-oils and flame-retardant fluids for the cast iron versions, subject to the limits given in the catalog. All versions can be supplied with ship approvals according to KRACHT.

In Oman and the GCC, the KRACHT KP Series is typically specified as the pressure source in hydraulic power units, on mobile machines and as a replacement pump on existing equipment. The fluid must have sufficient lubricity and must not contain coarse solid particles. Seven Star LLC can quote the pump by its KRACHT type key, including size, flange design, direction of rotation, seal material and valve option.

Technical Specifications

Key technical parameters for the KRACHT KP Series high pressure gear pump:

Parameter	Specification
Model	KRACHT KP Series (KP 1, KP 2, KP 3, KP 5)
Pump Type	High pressure external gear pump with hydraulic axial clearance compensation
Displacement	1.4 to 300 cm³/rev
Maximum Pressure	Up to 300 bar / 4,351 psi, depending on size and version
Fluid Temperature Range	-20°C to +150°C (-4°F to +302°F), seal dependent
Housing Material	Extruded aluminium alloy (KP 1) or cast iron
Bearing Type	Multi-layer plain bearings. PTFE-Pb coated bronze on steel backs in cast iron versions
Shaft Seal	Single radial shaft seal, NBR or FKM
Valve Options	Flange-mounted pressure relief valve, safety valve version with TUV approval
Special Options	ATEX version, motor-pump unit, outboard bearing, multiple pump combinations
Typical Applications	Mobile and stationary hydraulics, construction and agricultural machinery, municipal and special vehicles

Request a Quote for KRACHT KP Series High Pressure Gear Pump

To request a quotation for the KRACHT KP Series high pressure gear pump, contact Seven Star LLC with the complete type key from the pump nameplate, or with the required displacement, operating pressure, speed, fluid and direction of rotation. The KRACHT catalog for KP 1 to KP 5 is attached to this page and shows the type keys and dimensions. Pumps are supplied on request, lead time confirmed at quotation.

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About brand

Gear technology runs through the whole KRACHT catalog: gear pumps to move oil, gear flow meters to measure it, gear motors to drive with it, and the valves that protect the circuit. The company was established in 1911 and is based in Werdohl, Germany. Seven Star LLC lists KRACHT pumps, flow meters, valves and hydraulic motors, and sources them by type key for machinery and marine users in Oman.

KRACHT pumps, flow meters and valves listed

The listing follows four product groups, pumps, fluid measurement, valves and drives:

Pump technology: KF gear pumps for transfer of lubricating and other fluids, the KF-F version for fuels, and KP high pressure gear pumps
Fluid measurement technology: gear type flow meters such as the VCA in aluminum
Valve technology: SPV and SPVF pressure relief valves, the DBD directly controlled poppet valve, HV and HVF pilot operated valves and the DV B hydraulically pilot controlled valve
Drive technology: KM hydraulic gear motors

Where KRACHT equipment is used

KRACHT equipment serves the marine, renewable energy, process technology and hydraulics industries. In practice that means lube oil and fuel oil transfer on engines, gearboxes and compressors, oil supply units, and metering of oils, resins, paints and other viscous media with gear flow meters in dosing and test bench systems. Enquiries from the GCC are mostly for a KRACHT pump or valve fitted to an imported machine or a ship's auxiliary system.

Ordering KRACHT parts: what we need

KRACHT products carry a type key on the nameplate that encodes size, direction of rotation, shaft end, housing and seal material, connections and special numbers. An example from this page is SPV 10 L1G 1 A 12. Send the complete key and the serial or order number shown with it. If the plate is damaged, send the fluid and viscosity, flow rate, operating pressure and temperature, drive speed, port type and size, and photos with main dimensions. For KRACHT flow meters add the measuring range and the pickup or electronics required. We compare the key with KRACHT documentation and supply the manufacturer's data sheet on request.

Browse KRACHT products by category: Safety Relief Valves, Pumps, Flowmeters, Electromotors.

Frequently Asked Questions

What pressure and displacement range does the KRACHT KP Series cover?

KRACHT gives a displacement range of 1.4 to 300 cm³/rev and a maximum pressure of 300 bar for the KP Series. The permitted pressure is not the same for every size. It falls for the larger nominal sizes, so the limit for a specific pump must be read from the technical data table in the catalog.

Is the KRACHT KP an internal or an external gear pump?

The KP Series is an external gear pump. The KRACHT catalog describes the KP high pressure pumps as external gear pumps that work on the positive displacement principle, with a driving shaft and a driven shaft carrying the fluid in the tooth gaps along the housing wall from the suction side to the pressure side.

What seal and material options are available on the KRACHT KP Series?

Shaft seals and O-rings are available in NBR or FKM, and the media temperature range of -20 to +150 degrees C depends on the seal material. KP 1 is offered with an extruded aluminium alloy housing or in cast iron. KP 2, KP 3 and KP 5 have cast iron housings and covers.

Can the KRACHT KP Series be combined into multiple-pump configurations?

Yes. KRACHT offers multiple pumps as KP plus KP and KP plus KP plus KP, using the same or different sizes. The manufacturer lists hydraulically separated stages, the possibility of opposing flow direction, and high efficiency over wide speed ranges as characteristics of these combinations.

How does Seven Star LLC supply KRACHT KP gear pumps in Oman?

Seven Star LLC is an industrial supplier in Muscat that sources KRACHT KP gear pumps on request for customers in Oman and the GCC. Send the full type key from the nameplate or the required displacement, pressure and fluid. The lead time is confirmed at quotation and the offer follows the manufacturer catalog.

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