Radial shaft seal ringRadial shaft seal ringThe 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 setLonger screw setThanks to the longer spindle an external ball bearing is optionally offered.
Seal housingSeal housingDepending 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 connectionsFlexible connectionsIf 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 valveExternal overflow valveThe overflow valve ensures that the liquid is rerouted should excess pressurization occur.
Housing variantsHousing variantsDepending 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.
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.
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.
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.
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 mechanical 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
Flange screw pump CGF.
The flange screw pump CGF is the universal pump for horizontal installation.
Screw pump CGH.
Screw pump CGH – mounted onto base frames.
CG pedestal screw pump.
Space saving CG pedestal screw pumps are for vertical installation.
In-tank CK/CL screw pump.
CK/CL screw pumps are suitable for in-tank installation.
CK/CL flange screw pump.
The CK/CL flange screw pump line – universal horizontal installation pumps.
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