HLP 46 from ADDINOL
The hydraulic oil HLP 46 is used as pressure fluid in industrial and mobile hydraulic systems. It must withstand high thermal loads, prevent corrosion when water is supplied and minimise wear when mixed friction occurs.
The designation HLP 46 is composed of "HLP" and "46". HLP are the code letters of the hydraulic fluid, which are defined in DIN 51524-2. These are hydraulic oils with anti-ageing and anti-corrosion additives as well as active agents for reducing friction and wear. 46 describes the kinematic viscosity of the hydraulic oil (in mm²/s) at 40 °C. The respective viscosity classes were standardized by ISO VG.
Our HLP 46 hydraulic oils
HLP 46 properties
The HLP 46 hydraulic oils are characterised by the following properties:
- Very good demulsifying ability and good water separation ability
- Excellent air separation ability
- Low foaming tendency
- Good compatibility with the usual sealing and coating materials
- Excellent wear protection properties
- High thermal-oxidative stability
- High purity
The classification of hydraulic oils HLP according to DIN 51524-2 refers to the cleanliness class of the oil (no foreign matter in the production process), the demulsifying behaviour (water separation), the air separation ability and the foaming behaviour. For these aspects, specific limit values are defined which the hydraulic oil must not exceed if it is to be classified as HLP. The HLP lubricants from ADDINOL clearly fall below the limit values and thus meet the requirements of DIN 51524-2.
HLP 46 temperature range
The usual operating temperatures for hydraulic oils HLP 46 from ADDINOL may vary between -20 °C and 90 °C. In this temperature range, the effectiveness of the product is optimal. If the temperatures are too low or too high, the viscosity (viscosity-temperature behaviour) of the hydraulic oil changes too much and the lubricating film in the hydraulic system may break off. If the temperature drops below -30 °C, the oil solidifies and no longer flows. At temperatures above 268 °C the flash point of the oil is exceeded and the hydraulic oil starts to evaporate.
HLP 46 viscosity
The viscosity of HLP 46 is based on the defined viscosity class of ISO VG (International Organization for Standardization Viscosity Grade). This describes that the kinematic viscosity of the hydraulic oil at 40 °C must be between 41.4 and 50.6 mm²/s. The centre point viscosity is therefore located at 46 mm²/s. Oil of the ISO VG class 46 has approximately the flow behaviour like olive oil. It can therefore be regarded as comparatively thin. The ISO VG classes range from 2 (very thin) to 1500 (high viscous).