Since the OLG / ELG series bladder accumulator is no longer manufactured by Parker, OLAER (Schweiz) AG has developed and designed a successor model for the OLG and the ELG.

Bladder accumulator OLG / ELG

Storing, absorbing, pressurizing, cooling and filtering of fluids

Overview brochure Fluid Management OLAER - en (2.7 MiB)


Here you can find the new brochure about Pressure Shock Consideration and the Form for the collection of data.
You can download it, write the data directly into the PDF and then send it back to us per email.


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Forced flow pressure surge protection for drinking water systems

Pressure surges and under pressures within the drinking water systems are undesired consequences, which may result from sudden pump failures (for example after an emergency shut-down in the event of a power failure) and quick-closing valves. The damage that may be caused to pumping stations, pipelines and fittings can result in breakdowns, pipe bursts and contaminated drinking water.

Image 1: Pressure curve within the pumping station during the emergency shut-down










In 5 steps to a safe drinking water system – all from a single source

  1. Overall pressure shock/negative pressure analysis of the drinking water system
  2. Project-specific design of the forced-flow diaphragm pressure shock absorbers
  3. Production and commissioning of pressure surge/vacuum protection
  4. Plan monitoring during operation by sensor technology
  5. Nationwide After Sales Service (recurring maintenance works and tests)


Patented forced flow according to SVGW and DVGW

The media-separated diaphragm pressure shock absorber has a permanent forced flow while the pump is running, and avoids stagnant water.


  • Food certified according to SVGW and DVGW
  • No compressor system required
  • Highest efficiency (best in class) due to optimized flow and maximum free passage
  • High membrane longevity
  • Low maintenance and service costs
  • High pressure retention through gas-side nitrogen filling
  • Standard series up to 40 bar
  • Compact vertical or horizontal installation
  • Independent, decentralized installation possible

The robust diaphragm shock absorbers have been specially designed for load changes occurring during pressure surges. As a consequence, they differ from expansion vessels.





















We look forward to hearing from you!

Olaer (Schweiz) AG – Your specialist for pressure shock considerations and simulations/pressure surge tank design and production.








Newsletter Hydraulic 1/2019 June

Active water and oil cooling systems / Chiller

To achieve high working accuracy, tools and machines require constant spindle, lubricating and gear oil temperatures. Optimal cooling results depend on many factors. We analyse the existing conditions and offer a solution for every application.

Modern cooling systems help reducing operational costs, as cooled machines and tools last longer and work more accurately. Targeted cooling increase quantities at higher quality levels. The working accuracy of machine tools and the reproducibility of parts to be manufactured depend largely on the proper working temperature.

Besides external heat sources such as solar radiation, heating, etc., other internal heat sources (motors, bearings hydraulic units) as well as the cutting process negatively affect the stability of machine tools.

Advantages of our water cooling systems / oil cooling systems

  • Higher precision in the manufacture
  • Very small tolerances possible
  • Improved quality
  • Stable temperatures possible (accurate temperature control ± 0.1 to ± 2 K)
  • Compact, extremely resistant and reliable
  • Energy-efficient (deep water and sewage costs, low electricity costs)
  • No consumption of fresh water required
  • Longer life-time of the cooling medium (oil or water)
  • Low installation costs (no fresh water piping required)
  • Also possibile for very deep and constant water temperatures (LCW series up to – 30 °C)
  • Cooled machines and tools are durable
  • Higher productivity (higher quantity)
  • Cooling systems are ready to connect and ready-to-operate
  • Flexible installation site (independent of the existing pipeline)
  • Various versions with or without tank available
  • Various versions with/without pump possible
  • Compressor temperature-controlled (energy saving), cooling only when necessary
  • Many options for all possible applications available
  • Also available with bundle pipe evaporator (CU) ideal for handling contaminated oil and emulsions
  • Also available as immersion cooler (CI), easy to maintain and clean










Have we made you curious? Then, contact Marco Girardi for special consulting.