Radial shaft seal ring Radial shaft seal ring The CK series screw pump is only available with a radial shaft seal ring. The CL series screw pump can be equipped with different shaft sealing options thanks to the longer screw set. External bearings are also possible. This pump line is used as a horizontal or vertical foot-mounted or flange-mounted pump as well as in in-tank vertical arrangements.
Longer screw set Longer screw set Thanks to the longer spindle an external ball bearing is optionally offered.
Seal housing Seal housing Depending on the operational requirements various shaft seal options are possible for the CL series. The CL series screw pump is the cartridge (insert) pump of the CG series. The various housing options allow enormous flexibility in terms of the liquid connections. An external overflow valve can optionally be attached to the CG series screw pumps.
Flexible connections Flexible connections If the outer casing is made from fabricated steel, then almost any positioning, direction, size, type and rating of flange can be achieved. It can be ideally suited to match the installation situation.
External overflow valve External overflow valve The overflow valve ensures that the liquid is rerouted should excess pressurization occur.
Housing variants Housing variants Depending on the operational requirements cast iron or steel housings are offered for the CG series.

KRAL C Series Screw Pumps.

For pressures of up to 100 bar.

Efficient, self-priming high-pressure pump up to 100 bar.
Pump solution for high pressures at an excellent price-performance ratio. With KRAL screw pumps of the C series you buy high-pressure pumps with all the advantages of our KRAL pumps K and L: robust, low-wear, flexible, space-saving, durable and much more. Compared to other pump solutions, KRAL screw pumps convince with highest reliability, even under different operating conditions the screw pumps are highly efficient.

Due to the wide range of possible applications, we offer the KRAL C series as standard in the CK, CL and CG series. The main components of these pumps are all the same, the differences lie in the individual details, matched to the requirements in different applications (see detailed description below).

Application examples: Injection pumps, feed pumps, burner pumps, jacking pumps, transformer oil cleaning pumps, hydraulic pumps and generally all applications in which efficient, reliable high-pressure pumps for lubricating media are required.

Operation, materials, components.

  • Delivery rate CK: 1,750 l/min.
  • Delivery rate CL: 1,750 l/min.
  • Delivery rate CG: 3,550 l/min.
  • Temperature range: -20 °C to 180 °C, magnetic coupling to 300 °C.
  • Pressure range: 70 bar; 100 bar.
  • Housing: Nodular cast iron, steel and aluminium.
  • Spindles: Steel, nitrided.
  • Certifications: ABS, BV, CCS, DNV, GL, LRS, MRS, NK, RINA, KR.
  • ATEX: II 2 GD b/c group II, category 2.
  • Heating: Electrical, fluid media and steam.
  • Manufactured to conform with API.

KRAL CK series.

High-pressure pump for various media, easy to install.

The KRAL screw pump of the CK series is an extremely compact and cost-effective solution for high-pressure applications. It is also the best-selling screw pump line of the KRAL C series. Standardized pump / motor brackets made of aluminum are used for the CK pump - which is reflected in the favorable price and easy installation.

The screw pump of the CK series with its short shaft, radial shaft seal and internal bearings is a preferred solution in many applications.

 

Your advantages.

  • Flow rates up to 880 l/min.
  • Viscosity of 10,000 mm²/s.
  • Pressure maximum up to 100 bar.
  • Easy installation.
  • Inexpensive product for various pumped media.

KRAL CL series.

Reliable pump at high pressure.

The KRAL screw pump of the CL series is a high-pressure pump with a longer main spindle than the CK screw pump has. It can also be equipped with various shaft seals and external bearings. The KRAL CL series is often used as a horizontal or vertical foot pump or flange mounted pump as well as in tank-vertical arrangements.

KRAL screw pumps of the CL series are also used as cartridge (insert) pump for KRAL screw pumps of the CG series (see below).

 

Your advantages.

  • Flow rates up to 880 l/min.
  • Viscosity of 10,000 mm²/s.
  • Pressure maximum up to 100 bar.
  • Simple installation.
  • Inexpensive screw pump.

KRAL CG series.

Extremely flexible high-pressure pump.

The KRAL screw pump of the CG series is used as a cartridge pump (insert pump) for the CL series and is available with various housings, relief valves and connections. The housing is available in cast iron or steel. We also manufacture the KRAL screw pumps of the CG series with heating jacket for high-viscosity media. The different housing options allow almost any location as well as many sizes and types of liquid connections.

The KRAL CG series - our flexible product for many different applications – as you can see in our product catalog or on our website pump overview.

Your advantages.

  • Flow rates up to 3,550 l/min.
  • Viscosity of 1,000,000 mm²/s.
  • Pressure maximum up to 100 bar.
  • A variety of housings, relief valves and connections.
  • Housing in cast iron or steel available.
  • Heating jacket for high-viscosity liquids.
  • For almost any location, size and type of liquid connection.
  • External overflow valve can be optionally attached.
  • Technical data.

    CK series

    CK series.

    Technical data CK 5-10 15-26 32-42 55-85 105-118 160-210 235-275 370-450 550-880
    Qth (1.450 min-¹, 0 bar) l/min 5-10 15-26 32-42 55-85 105-118 160-210 235-275 370-450 550-880
                         
                         
    Max. discharge pressure bar 100 70 70 70 70 70 70 70 40
                         
    Temperature °C                  
    with radial shaft seal NBR
    with radial shaft seal FKM    		   90
    150    		 90
    150    		 90
    150    		 90
    150    		 90
    150    		 90
    150    		 90
    150    		 90
    150    		 90
    150
                         
    Viscosity mm²/s                  
    min.   1.1 1.1 1.1 1.1 1.1 1.1 1.4 1.4 1.4
    max.   10,000 10,000 10,000 10,000 10,000 10,000 10,000 10,000 10,000
                         
    Max. pressure at suction flange bar                  
    with radial shaft seal   10 10 10 10 10 10 10 10 10

    CL series

    CL series.

    Technical data CL 5-10 15-26 32-42 55-85 105-118 160-210 235-275 370-450 550-880
                       
    Qth (1.450 min-¹, 0 bar) l/min 5-10 15-26 32-42 55-85 105-118 160-210 235-275 370-450 550-880
                         
    Max. discharge pressure bar 100 100 100 100 100 100 100 80 80
                         
    Temperature °C                  
    with stuffing box packing   80 80 80 80 80 80 80 80 80
    with radial shaft seal   150 150 150 150 150 150 150 150 150
    with mechanical seal - standard   150 150 150 150 150 150 150 150 150
    with mechanical seal - hard material   180 180 180 180 180 180 180 180 180
    with magnetic coupling   300 300 300 300 300 300 300 300 300
                         
    Viscosity mm²/s                  
    min.   1.1 1.1 1.1 1.1 1.1 1.1 1.4 1.4 1.4
    max.   10,000 10,000 10,000 10,000 10,000 10,000 10,000 10,000 10,000
                         
    Max. pressure at suction flange bar                  
    with stuffing box packing   3 3 3 3 3 3 3 3 3
    with radial shaft seal   10 10 10 10 10 10 10 10 10
    with mechanical seal   30 30 30 30 30 30 30 30 30
    with magnetic coupling   16 16 16 16 16 16 16 16 16

    CG series

    CG series.

    Technical data CG 15-26 32-42 55-85 105-118 160-210 235-275
    Qth (1.450 min-¹, 0 bar) l/min 15-26 32-42 55-85 105-118 160-210 235-275
                   
    Max. discharge pressure bar 100 100 100 100 100 100
                   
    Temperature °C            
    with stuffing box packing   80 80 80 80 80 80
    with radial shaft seal   150 150 150 150 150 150
    with mechanical seal - standard   150 150 150 150 150 150
    with machanical seal - hard material   180 180 180 180 180 180
    with magnetic coupling   300 300 300 300 300 300
                   
    Viscosity mm²/s            
    min.   1.1 1.1 1.1 1.1 1.1 1.1
    max.   1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000
                   
    Max. pressure at suction flange bar            
    with stuffing box packing   3 3 3 3 3 3
    with radial shaft seal   10 10 10 10 10 10
    with mechanical seal    30 30 30 30 30 30
    with magnetic coupling   100 100 100 100 100 100
    Technical data CG 370-450 550-880 851-951 1101-1301 1501-1701 2250-3550
    Qth (1.450 min-¹, 0 bar) l/min 370-450 550-880 851-951 1101-1301 1501-1701 2250-3550
                   
    Max. discharge pressure bar 100 100 100 100 100 100
                   
    Temperature °C            
    with stuffing box packing   80 80 - - - -
    with radial shaft seal   150 150 150 150 150 150
    with mechanical seal - standard   150 150 150 150 150 150
    with mechanical seal - hard material   180 180 180 180 180 180
    with magnetic coupling   300 300 300 300 300 300
                   
    Viscosity mm²/s            
    min.   1.4 1.4 1.4 1.4 1.4 1.4
    max.   1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000
                   
    Max. pressure at suction flange bar            
    with stuffing box packing   3 3 - - - -
    with radial shaft seal   10 10 10 10 10 10
    with mechanical seal    30 30 30 30 30 30
    with magnetic coupling   100 100 100 100 100 100
  • Models.
    Flange screw pump CGF.
    flansch-schraubenspindelpumpe CGF universalpumpe für horizontale aufstellung

    The flange screw pump CGF is the universal pump for horizontal installation.

    Screw pump CGH.
    schraubenspindelpumpe baureihe CGH in horizontaler aufstellung

    Screw pump CGH – mounted onto base frames.

    CG pedestal screw pump.
    sockel-schraubenspindelpumpe CG platzsparende, vertikal aufstellbare pumpe

    Space saving CG pedestal screw pumps are for vertical installation.

    In-tank CK/CL screw pump.
    tankeinbau-schraubenspindelpumpe CK/CL sind zum installieren bequem

    CK/CL screw pumps are suitable for in-tank installation.

    CK/CL flange screw pump.
    flanschschraubenspindelpumpe universalpumpe für horizontale aufstellung

    The CK/CL flange screw pump line – universal horizontal installation pumps.

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  • Operating instructions.
    DOWNLOADS
    Go to KRAL GmbH and download the document ➔
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