Which type of Hydraulic oil for Hydraulic tools should we use
What’s Hydraulic oil grade used for Hydraulic tools?
Hydraulic oil ISO VG 15 -32 are the right choice for Hydraulic tools
Hydraulic oil ISO VG 46 is too thicker to be drawn out by the Hydraulic power pack can not be used in a Hydraulic system.
What are the requirements of hydraulic oil for Hydraulic tools?
The factors for hydraulic oil fill in the oil bag or matching pump for Hydraulic tools considered are as follows:
1. Viscosity-temperature performance
Viscosity is the primary indicator for hydraulic oil has an essential influence on the hydraulic system If the density is too small, there’s Endoleak without enough pressure If the viscosity is too high, it’s hard for the pump to suck oil, frictional resistance increases and the hydraulic valve easily be stuck.
Oil temperature would rise during the hydraulic system’s working, resulting in oil pressure loss. If the viscositytemperature performance of the hydraulic oil is poor, the viscosity will drop significantly, resulting in insufficient lubrication, leakage risk increased, and working accuracy affected. Therefore, the variation range of thickness should be negligible within the scope of working temperature variation. The general hydraulic oil temperature Viscosity index require above 90.
2. Anti-rust performance
When we store the hydraulic equipment for a long time, the hydraulic components are prone to rust, which requires the hydraulic oil to have good anti-rust performance.
3. Antioxidant properties
Oil temperature gradually rises during hydraulic system work, and the oil will oxidate under high temperatures. Oil oxidization generates dirty stuff. It pollutes the system and affects its regular operation.
4. Anti-emulsification performance
If water is mixed in hydraulic oil, the less stable substances in the hydraulic oil will generate hydrophilic organic acids and soaps, which will be emulsified under the stirring of the pump, reducing the lubricity and affecting the functional performance of the pump and valve.
5. Anti-foam performance
If the hydraulic oil has foam, it will cause the hydraulic system to creep and make noise.
6. Lubrication performance
The proper clearance of each moving part of the hydraulic component is minimal, generally from a few microns to about 100 microns. Therefore, to improve the life of the elements, it is required to form a high-strength oil film on the moving surface to form liquid lubrication and reduce wear.
7. Freezing point
The freezing point of hydraulic oil should be lower than the lowest temperature of the environment by 10 °C. Otherwise, the hydraulic system would be affected and even fail to work when the temperature is too low.
8. Compatibility
Oil should have no chemical effect with various materials to avoid deterioration and failure.