Jung Process Systems GmbH
Auweg 2 · 25495 Kummerfeld
Tel. +49 4101 7958-140 · Fax +49 4101 7958-142
info@jung-process-systems.de · www.jung-process-systems.de

Twin-screw pumps

Twin-screw pumps

CHEMSPIN ATEX – flexible, universal, and safe

CHEMSPIN twin-screw pumps can also be used in ATEX Zones 1, 2, 21, and 22. Hereby, and depending on pumping temperature, temperature classes T2 to T4 can be realised. The contact-free conveying principle is of advantage here. Also the CHEMSPIN ES with lengthened screws is available as an ATEX version.

Hereby, the ATEX concept consists of the following measures:

• Use of flameproof enclosed motors for speed control

• Surface temperature monitoring with sensors on pump housing and bearing supports

• Maintaining seal temperatures by means of a monitored flushing system for double-acting floating ring seals

• Dry running is prevented by monitoring with single-acting floating ring seals

• Non-failsafe couplings or spark suppression using couplings in an oil bath

• Non-sparking contact protection for base plate devices

• Earthing connections for equipotential bonding

Dry-run safe units with corresponding shaft seals can be supplied.

You have questions?
We will be happy to advise you.

+49 4101 80409-0

Herausforderung: Entgasen von Säften mit Fasern und Pulpen in der Getränkeindustrie

Henning Grönwoldt-Hesse

Advantages at a glance
  • Very high flexibility
    Many different products and a wide range of flow quantities and viscosities can be handled by a single pump. Reverse operation is possible – the range of different pumps in a plant can be reduced considerably.
  • Safe operation
    Loaded, abrasive or lumpy media can be conveyed – a suitable shaft seal can provide dry-run protection. Very low vibration and noise levels.
  • Low cavitation risk
    The CHEMSPIN exhibits very low NSPH values. This applies for the full operating range, also for operating points close to zero throughput. Increasing pump speeds and viscosities only have a limited effect.
  • Self-priming, able to handle entrained gas
    Outstanding suitability for emptying & transfer pumping operations.
  • High chemical resistance
    The CHEMSPIN is made of 1.4404 stainless steel as standard. Hardened pumping elements and contactless operation ensure high wear resistance.
Technical data / performance features







Max. capacity

20 m³/h

40 m³/h

100 m³/h

180 m³/h

300 m³/h

Max. delivery pressure

20 bar

25 bar

30 bar

20 bar

35 bar

Max. ø of solids

16 (25) mm

20 (30) mm

28 (45) mm

35 mm

46 (64) mm

Suction capacity

NPSHr >0.5 m, suction heights up to 9 m possible


0.5 to 1 000 000 mPa·s, higher values after consultation

Pumping temperature

-10 to 180 °C, higher values on request


full CIP cleaning in the plant


SIP in the plant with steam or hot water

Product-wetted parts

Choice of 1.4404, 1.4539, or 1.4462 – other materials on request


HNBR, FPM, EPDM, FFPM, FDA approval, other elastomers on request

Shaft seals

Single and double-acting floating ring seals, with knife edge for sticky media to prevent start-up damage, single-acting, dry-run safe lip seal

Pump orientation

horizontal, vertical, or sideways (INLINE versions possible)


Different sizes and connecting standards after agreement


Compact, robust modular design for all versions, with free shaft end for sizes 70, 90, and 125


Three-phase, gear, or servo-motors (hygienic stainless steel drives as an option)


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