Dosing pumps & dosing systems

Dosing Technology

We dose what flows. Together with SERA (Seybert & Rahier) we develop customised dosing solutions — tailored to your requirements.

Manufacturer
SERA (Seybert & Rahier)
Used in
Food & beverage · water · process · power

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Pump units with electric motors and insulated pipework in a process plant

In cooperation with SERA

Precise, durable and safe handling of liquids

Dosing systems have to be precise, durable and safe. With decades of practical experience, bespoke design and personal expert service, we support reliable plant operation, the efficient use of resources and stable processes.

SERA dosing pumps can handle nearly all flowing media — including aggressive, abrasive, odorous, inflammable, viscous or toxic liquids — reliably and safely.

SERA diaphragm dosing pumps with blue motors

Product range

From the single pump to the complete system

  • Dosing pumps

    Various types — solenoid, stepper-motor, diaphragm, piston diaphragm, piston and multi-layer diaphragm pumps.

  • Feed pumps

    Air-driven diaphragm pumps and magnetically coupled centrifugal pumps.

  • Dosing systems

    Standardised compact systems and systems designed to your specification.

  • Accessories and fittings

    Components and fittings for dosing systems.

  • Measurement and control technology

    For monitored, accurately controlled dosing processes.

Dosing pumps

Pump types and performance ranges

Solenoid diaphragm pumps

Available with extensive control electronics, multi-function valves, complete dosing kits (“plug & dose”) and PROFIBUS DP interface.

Flow rate0.4 – 35 l/h
Back pressureup to 10 bar

Stepper motor pumps (iSTEP)

Combines an intelligent drive concept with the accuracy of a diaphragm pump, for high reproducibility.

Flow rateup to 50 l/h
Back pressureup to 10 bar

Diaphragm pumps

Leak-free oscillating displacement pumps.

Flow rate0.4 – 1,450 l/h
Back pressureup to 10 bar

Piston diaphragm pumps

Combine the high delivery pressure of a piston pump with the leak-tightness of a diaphragm pump.

Flow rate7.5 – 850 l/h
Back pressureup to 80 bar

Piston pumps

Versatile and safe to operate despite the high pressure range; low-wear components keep maintenance low.

Flow rate8 – 22 l/h
Back pressureup to 140 bar

Multi-layer diaphragm pumps

The multi-layer diaphragm enables demanding safety dosing tasks.

Flow rate11 – 1,200 l/h
Back pressureup to 20 bar

Air-driven diaphragm pumps

Cost-effective, leak-free feed pumps driven by dry, non-lubricated compressed air.

Flow rate5 – 850 l/h
Back pressureup to 7 bar

Magnetically coupled centrifugal pumps

SERA FTi centrifugal pumps for a wide range of applications.

Performance ranges as previously published by thenex. Please ask for current data sheets for your application.

Dosing systems

Standard and customised systems

Standardised compact dosing systems

  • Modular design with standard components
  • Adapted to the individual dosing task
  • Controlled, precise dosing of a liquid into a process or medium

Polymer preparation (PolyLine®)

  • PolyLine® Flow — three-chamber system
  • PolyLine® Swing — pendulum system
  • PolyLine® Double — double-deck version

Specialised systems

  • Sodium hydroxide preparation systems for large, fluctuating demand
  • KKV dosing systems with automatic monitoring
  • Chlorine dioxide preparation and dosing units (2 % and 0.2 % solutions, up to 1,000 g ClO₂/h at up to 10 bar)

Customised dosing systems

  • Individual dosing systems tailored to your requirements
  • Developed together with SERA

Applications

Where our dosing systems are used

  • Food & beverage industry
  • Water and wastewater treatment
  • Industrial process solutions
  • Power plants

Also from SERA

Compressor and hydrogen technology

Beyond dosing, thenex supplies SERA compressor technology: metal diaphragm compressors for contamination-free compression of sensitive gases, dry-running piston compressors, and systems for hydrogen applications such as refuelling stations and power-to-gas storage.

Complete SERA dosing system in a cabinet with tanks and pumps

Related categories

All products & services

Planning a dosing task?

Tell us the medium, flow rate, pressure and application — we work out the right pump or system with SERA.

Send an enquiry