Ricerca di "fluids".

readily biodegradable hydraulic fluids are used. These fluids can be produced from mineral oil or using renewable materials. They are also referred to as bio-based hydraulic fluids. [...] Hydraulic fluids have the task of transporting hydraulic energy from the location of generation (pump) to the location of conversion ( cylinder , motor) with the minimum possible losses. They are also [...] contamination, which is caused by debris, for example. For this task, mineral oils and flame-resistant fluids are available. In addition, in environments that are critical for biology (construction machines

creates sludge or resin-like coatings on device parts as ageing products. The ageing of hydraulic fluids is accelerated by air (oxygen), water, high temperatures and metal catalysts. It is measured by the

Collective term for fluid and gaseous media. Here fluids is above all a common term for hydraulic fluids and compressed air.

solutions are completely oil-free and more environmentally friendly in general. High Water Based Fluids (HWBF) fluids have the same viscosity as water and may only be used between +5°C and +55°C. They have no [...] Fire-resistant fluids based on water with 2 to 5% concentrate intended to give the water a minimum level of protection against corrosion and wear. Depending on the composition of the concentrate, emulsions [...] each case and the respective user is responsible for mixing the concentrate in. "Thickened water" fluids based on HWBF whereby certain polymers ("water thickeners") are molecularly dispersed in water at

Water-free, synthetically produced fire-resistant fluids. They rely on the following compounds: Phosphoric ester (HFD R), currently the most widely used HFD fluid; performs worst in terms of fire resistance [...] environmental protection. Mixtures of HFD R and HFD S. Other compositions (HFD U). Common to All HFD fluids is the lack of compatibility with most materials for seals and a high density of 1.15 to 1.4 g/cm3

Fire-resistant fluids based on a solution of polymers (polyglycols) in water at a ratio of around 60:40. HFC pressure fluids have a viscosity of 30 to 45 mm2/s at 50°C and may be used instead of mineral [...] Sole restriction: roller bearings have a shorter lifetime given the water content of HFC pressure fluids and the working temperature is limited to a range between –20°C and +60°C. The water content must

In order for the hydraulic fluid to deliver sufficient lubricating effect in plain bearings and under seals , it must have sufficient wetting ability. This is generally the case with HLPD oils .

Fire-resistant fluids based on "water in oil", i.e. an emulsion of around 40% water in mineral oil. Not used in Germany (although they are in the UK, for example).

Biodegradable fluids are hydraulic fluids that biodegrade significantly more quickly than mineral oils. Biodegradation is a chemical conversion caused by microorganisms under aerobic conditions in an

Compressibility