sera ProDos is dosing pump manufacturer and system supplier of high quality products and services for waste water and water treatment and disinfection as well as accurately measured and controlled dosing and feeding of chemicals and liquids for a wide range of industries like food and beverage, breweries, pulp and paper, chemical, petrochemical, mechanical and plant engineering, energy and power plants, textile, printing, environmental etc.
sera ComPress is manufacturer of single- and multi-stage compressors and customized specific solutions for compressing and feeding of gases, especially high-purity gases free of oil, impurity and leakage.
sera develops and manufactures components and systems for industrial processes in which liquids are precisely conveyed, dosed and monitored.
The product overview bundles the entire portfolio - from individual pumps and fittings to measurement, control and regulation technology through to standardised and customised systems.
All products are designed for defined media, flow rates, pressure ranges and operating conditions and can be combined into functional units or complete systems depending on requirements. This results in stable, safe and economical system operation - for different industries and applications.

sera solenoid diaphragm pumps are used for precise, process-dependent controlled dosing of liquid media in all areas of industry.
The liquid is pumped through a deformable drive diaphragm. This diaphragm is firmly connected to the drive solenoid via a push rod and is thus deflected for the suction and pressure stroke.
The flow rate of the dosing pump C204.1 can be set manually via the stroke
length adjustment 0...100%.

sera diaphragm pumps type C409.2 are electronically controlled, oscillating positive displacement pumps for dosing liquids in all areas of industry.
Each drive unit consists of a tried-and-tested motor, coupled with a reciprocating gear mechanism within a robust housing. sera housings are designed to withstand even the harshest operating conditions. The material thickness and surface treatment ensure resistance even to chemical attack. The flow rate is constant or infinitely variable. In the adjustable version, this is done manually by changing the stroke length. Automatic flow rate adjustment can be achieved via the following options:
The dosing pumps can be equipped with a choice of two different electronic control systems (Pro or Pro+).
(For details, see Downloads – Product Information)
Servo motors with positioners for automatic stroke length adjustment

sera piston diaphragm pumps type C409.2-KM are leakage-free oscillating positive displacement pumps. They ideally combine the high delivery pressure of a piston pump with the perfect tightness of a diaphragm pump.
Each drive unit consists of a tried-and-tested motor, coupled with a reciprocating gear mechanism within a robust housing. sera housings are designed to withstand even the harshest operating conditions. The material thickness and surface treatment ensure resistance even to chemical attack. The flow rate is constant or infinitely variable. In the adjustable version, this is done manually by changing the stroke length. Automatic flow rate adjustment can be achieved via the following options:
The dosing pumps can be equipped with a choice of two different electronic control systems (Pro or Pro+).
(For details, see Downloads – Product Information)
Servo motors with positioners for automatic stroke length adjustment

The use of multi-layer diaphragms makes it possible to realise dosing tasks that are demanding in terms of safety. Increased safety requirements are guaranteed by safe diaphragm monitoring (pressure switch, pressure gauge, etc.).
Each drive unit consists of a tried-and-tested motor, coupled with a reciprocating gear mechanism within a robust housing. sera housings are designed to withstand even the harshest operating conditions. The material thickness and surface treatment ensure resistance even to chemical attack. The flow rate is constant or infinitely variable. In the adjustable version, this is done manually by changing the stroke length. Automatic flow rate adjustment can be achieved via the following options:
The dosing pumps can be equipped with a choice of two different electronic control systems (Pro or Pro+).
(For details, see Downloads – Product Information)
Servo motors with positioners for automatic stroke length adjustment

sera diaphragm pumps type C410.2 are electronically controlled, oscillating positive displacement pumps for dosing liquids in all areas of industry.
Each drive unit consists of a tried-and-tested motor, coupled with a reciprocating gear mechanism within a robust housing. sera housings are designed to withstand even the harshest operating conditions. The material thickness and surface treatment ensure resistance even to chemical attack. The flow rate is constant or infinitely variable. In the adjustable version, this is done manually by changing the stroke length. Automatic flow rate adjustment can be achieved via the following options: The dosing pumps can be equipped with a choice of two different electronic control systems (Pro or Pro+). (For details, see Downloads – Product Information) Servo motors with positioners for automatic stroke length adjustment

The use of multi-layer diaphragms makes it possible to realise dosing tasks that are demanding in terms of safety. A high level of safety is guaranteed by diaphragm monitoring (pressure switch, pressure gauge, etc.).
Each drive unit consists of a tried-and-tested motor, coupled with a reciprocating gear mechanism within a robust housing. sera housings are designed to withstand even the harshest operating conditions. The material thickness and surface treatment ensure resistance even to chemical attack. The flow rate is constant or infinitely variable. In the adjustable version, this is done manually by changing the stroke length. Automatic flow rate adjustment can be achieved via the following options:
The dosing pumps can be equipped with a choice of two different electronic control systems (Pro or Pro+).
(For details, see Downloads – Product Information)
Servo motors with positioners for automatic stroke length adjustment

sera solenoid diaphragm pumps are used for precise, process-dependent controlled dosing of liquid media in all areas of industry.
The liquid is pumped through a deformable drive diaphragm. This diaphragm is firmly connected to the drive solenoid via a push rod and is thus deflected for the suction and pressure stroke.
The flow rate of the dosing pump R204.1 can be set manually via the stroke length adjustment 0...100%.

sera diaphragm pumps type RF409.2 are oscillating positive displacement pumps for dosing liquids in all areas of industry.
The respective drive unit consists of a proven motor brand, coupled with a lifting gear in a robust housing.
sera housings can withstand even the toughest operating conditions. The material thickness and surface treatment even withstand chemical attacks. The flow rate is constant or infinitely variable. In the adjustable version, this is done manually by changing the stroke length.
The automatic adjustment of the flow rate can be achieved using the following options:
Drive motor with frequency converter or acutators with positioners for automatic stroke length adjustment.

sera piston pumps are versatile and extremely reliable despite their high pressure range. Thanks to low-wear components, they require almost no maintenance and therefore impress with their usual quality and reliability.

The use of multi-layer diaphragms makes it possible to realise dosing tasks that are demanding in terms of safety. Improved diaphragm service life and diaphragm monitoring (pressure switch, pressure gauge, etc.) contribute to the increased safety requirements.

The sera piston diaphragm pumps 509.1 KM transmit the stroke movement of the mechanically controlled piston hydraulically to the multi-layer diaphragm. An integrated compensating valve ensures an excellent dosing accuracy and an optimum overload protection. The flow rate can be adjusted via the stroke length by means of a variable eccentric. The flow rate is also adjustable via a speed control using an external frequency converter.
OVERVIEW OF THE BENEFITS

The sera iSTEP S combines an intelligent drive concept with the precision of a diaphragm dosing pump and sets standards in terms of reducibility and reliability.
Thanks to the variable speed adjustment and a performance range of 0.02...50 l/h at 10...3 bar, the possible applications are almost unlimited.
It is intuitive to operate, durable and particularly suitable for demanding dosing tasks.
The drive unit of the iSTEP M consists of a microprocessor-controlled electric motor coupled with a precise eccentric drive in a robust plastic housing. sera housings and base rings meet all requirements and, thanks to their material, are also resistant to chemical attack.
The flow rate can be adjusted manually or continuously via signals. An adjustment range of 1:1000 can be achieved. The flow rate is controlled via the stroke speed.

sera piston diaphragm pumps type RF409.2-KM are leakage-free, oscillating positive displacement pumps. They ideally combine the high delivery pressure of a piston pump with the perfect tightness of a diaphragm pump.

Used in the paint and varnish industry, metal processing and in the food industry for decanting/dispensing viscous media at max. 8 bar back pressure.
Air-operated double diaphragm pumps are positive displacement pumps with two opposing pump chambers. The two diaphragms are connected to each other via a shaft. The special feature of air-operated diaphragm pumps is that the drive and the pumped medium are completely separate from each other.

The M pump series is the standard for pumping corrosive media and impresses with its extreme dry-running capability and a maximum flow rate of 42 m³/h.
The optimal material is available for every dosing medium!

The MP pump series combines fast and powerful self-priming with the advantages of a magnetically coupled pump and corrosion-resistant materials. It impresses with a maximum flow rate of 46 m³/h.
The optimal material is available for every dosing medium!

High quality hose from a unique manufacturing process. Extruded inner layer, high-density textile reinforcement and precision-manufactured outer layer ensure optimum compression and fast installation thanks to controlled tolerances. The available materials enable use for all available media and operating conditions. Excellent performance with abrasive and/or corrosive media and high temperatures.

sera feed pumps are oscillating positive displacement pumps with two pump heads for pumping and dosing liquids in all areas of industry.
In this compact unit, the two opposing pump heads are brought together on the suction and discharge sides.

sera diaphragm feed pumps are oscillating positive displacement pumps for pumping and dosing liquids in all areas of industry.
Drive motor with integrated frequency converter.

Standardisierte Kompaktdosierstationen CTD (Compact Tank Dosing) vereinen individuelle Konfiguration und kurze Lieferzeiten.
Die komplette Typenreihe ist vollständig modular aufgebaut und mit standardisierten Bauteilen versehen. Dadurch lassen sich die Anlagen, wie aus einem Baukasten, individuell für den jeweiligen Anwendungsfall anschlussfertig zusammen stellen und sind in deutlich kürzerer Zeit lieferbar.
Durch die Kombination von drei sera Pumpenbaureihen mit sieben unterschiedlichen Behältergrößen, ergibt sich ein breites Konfigurationsspektrum.
Die Möglichkeiten reichen vom kleinen 40 Liter-Behälter mit einfacher Magnetmembranpumpe bis zum 1.000 Liter-Behälter mit elektrisch ansteuerbarer Motormembranpumpe, Elektrorührwerk und umfangreichem Sicherheitspaket.

sera dosing systems type CVD are suitable for use with IBCs, drums and very small containers.
The fully modular design allows the functions of the system to be adapted to individual dosing requirements using standardised components - as if from a construction kit.

sera dosing systems type CVD are suitable for use with IBCs, drums and very small containers.
The fully modular design allows the functions of the system to be adapted to individual dosing requirements using standardised components - as if from a construction kit.

sera dosing systems type CVD are suitable for use with IBCs, drums and very small containers.
The fully modular design allows the functions of the system to be adapted to individual dosing requirements using standardised components - as if from a construction kit.

In most processes, the continuous withdrawal of chemicals is very important – as is the cost-effectiveness of the process. With the IBC emptying station, sera has launched a system that meets both requirements.

PolyLine from sera is a series of simple and flexible, economical and powerful systems for preparing polymers. The series covers preparation systems that can be used with dry or liquid polymers.
In the double-deck variant, the chambers are ar-ranged one on top of the other. The polymer is prepared in the upper chamber. After the matur-ing time is complete, the fully matured product is drained into the lower chamber. Product entrainment is prevented through the process.

PolyLine from sera is a series of simple and flexible, economical and powerful systems for preparing polymers. The series covers preparation systems that can be used with dry or liquid polymers.
In the 3-chamber system, the polymer is dissolved with water in the first chamber. The product matures in the second chamber. The finished solution reaches the third chamber via the overflow, where removal takes place. Product entrainment is minimised by a process that is optimally tailored to the task.

PolyLine from sera is a series of simple and flexible, economical and powerful systems for preparing polymers. The series covers preparation systems that can be used with dry or liquid polymers. The systems are equipped with precise flow measurement for solution preparation and filling level measurement, to ensure the efficient and economical operation of the systems.

PolyLine from sera is a series of simple and flexible, economical and powerful systems for preparing polymers. The series covers preparation systems that can be used with dry or liquid polymers.
The pendulum system tank consists of two separate chambers. The polymer solution is prepared successively in the chambers. After a defined maturing time, the polymer solution is available for extraction. Product entrainment is excluded.

Every application has its own requirements - which is why the sera Group develops customised system solutions that are precisely tailored to the processes, media and environmental conditions of our customers.
From planning and design to measurement technology, electrical engineering and commissioning, we create complete systems from a single source.
Our internationally networked engineering team implements individual design parameters, industry-specific requirements and special requests with precision - for maximum efficiency, safety and reliability.
Below you will find a selection of our customised systems, which show how we transform complex tasks into practical, durable and innovative solutions.







sera pressure-keeping valves ensure the precision of the dosing pump by preventing cavitation.
The pressure-keeping valve prevents the dosing pump from being overloaded under unfavourable geodetic conditions. The set pressure of the valve creates the necessary positive pressure differential between the pressure and suction sides of the pump.
Pressure valves do not function as shut-off valves.







Suction lances for removing fluids from containers and delivery packs. The integrated foot valve prevents the sucked-in fluid from flowing back.
Max. flow rate: 200 l/h

Suction lances for removing fluids from containers and delivery packs. The integrated foot valve prevents the sucked-in fluid from flowing back.
Level switch floating open (NC)
Max. flow rate: 35 l/h

Suction lances for removing fluids from containers and delivery packs. The integrated foot valve prevents the sucked-in fluid from flowing back.
1- or 2-stage level monitoring
Level switch floating open (NC)
Max. flow rate: 200 l/h

Suction lances for removing fluids from containers and delivery packs. The integrated foot valve prevents the sucked-in fluid from flowing back.
Level switch floating open (NC)
Max. flow rate: 700 l/h

Suction lances for removing fluids from containers and delivery packs. The integrated foot valve prevents the sucked-in fluid from flowing back.
Level switch floating open (NC)
Max. flow rate: 700 l/h




In order to integrate sera dosing pumps economically into automatic process sequences, the sera control and regulation range includes a series of standardised and customer-specific basic controls.
Performance features


The compressor stations in the Modular Energy System (MES) series are essential components for decentralised energy supply solutions in neighbourhoods and industry. They compress hydrogen for long-term storage and thus enable an independent and emission-free energy and heat supply - ideal for self-sufficient applications such as emergency power solutions or the continuous supply of hydrogen for heat and power generation.
The task of sera HYDROGENsera HYDROGEN develops and supplies the pressure boosting solution of the Modular Energy System. This ensures the targeted compression of hydrogen to increase the energy density and thus enables storage in high-pressure tanks. The system can be flexibly integrated into existing energy infrastructures - with hydrogen sources such as electrolysers or other generation systems upstream and storage systems or consumers downstream.

With the Compact Compressor Solution (CCS), sera HYDROGEN offers an innovative system solution for utilising hydrogen for various applications. The hydrogen can be compressed directly from electrolysis, from trailers or by delivery into pipelines.
sera HYDROGEN develops and supplies the pressure boosting solution of the Compact Compressor Solution. This ensures that hydrogen is compressed as required and prepared for further use. The compressed hydrogen can then be

"Water is the coal of the future. The energy of tomorrow is water that has been broken down by electricity. The elements of water thus decomposed, hydrogen and oxygen, will secure the earth's energy supply for the indefinite future." - Jules Verne, The Mysterious Island (1870)
A vision that is more relevant today than ever. While fossil fuels are dwindling and sustainable energy solutions are becoming increasingly important, sera GmbH is focussing on innovative hydrogen technology. With our hydrogen refuelling station, we are making a decisive contribution to emission-free mobility and a sustainable energy future. Hydrogen - a fuel with a future.




Availability therefore does not happen by chance. It is the result of planning, experience and consistent support.
Something that is often underestimated: Normal operation is not the risk. The risk is unplanned downtime.