What type of hydraulic oil is there?
Hydraulic oil is an indispensable working medium in the hydraulic system, and its performance directly affects the operating efficiency and life of the equipment. Different types of hydraulic oil are suitable for different working conditions and equipment needs. This article will introduce in detail the common models, classification standards and application scenarios of hydraulic oil to help users better choose suitable hydraulic oil.
1. Classification standards of hydraulic oil
Hydraulic oils are typically classified according to their base oil type, viscosity grade, and service performance. The following are common classification criteria:
| Classification criteria | Description |
|---|---|
| Base oil type | Mineral oil, synthetic oil (such as PAO, ester oil), semi-synthetic oil |
| Viscosity grade | ISO VG (international standard viscosity grade), such as VG 32, VG 46, VG 68, etc. |
| Usage performance | Wear resistance (HM), oxygen resistance (HO), low temperature performance (HV), etc. |
2. Common hydraulic oil models and characteristics
The following are common hydraulic oil models and their characteristics on the market:
| Model | Viscosity grade | Main features | Applicable scenarios |
|---|---|---|---|
| HL | VG 32, VG 46 | Ordinary mineral oil, average antioxidant properties | Low pressure hydraulic system |
| HM | VG 32, VG 46, VG 68 | Strong anti-wear performance, extending equipment life | Medium and high pressure hydraulic system |
| HV | VG 32, VG 46 | Good low temperature fluidity, suitable for cold areas | Hydraulic systems in low temperature environments |
| HS | VG 15, VG 22 | Synthetic oil with excellent high temperature stability | High temperature or extreme conditions |
3. How to choose the appropriate hydraulic oil
Consider the following factors when selecting hydraulic oil:
1.Viscosity grade: Select according to the equipment manufacturer’s recommendations or working conditions. For example, VG 46 is suitable for most medium voltage systems.
2.temperature range: For low-temperature environments, choose the HV model, and for high-temperature environments, choose the HS model.
3.Device type: Precision equipment requires anti-wear type (HM), and ordinary equipment can choose HL type.
4.Environmental requirements: Synthetic or biodegradable oils are more environmentally friendly, but cost more.
4. Precautions for using hydraulic oil
1. Change hydraulic oil regularly to avoid oxidation and contamination.
2. Different types of hydraulic oil cannot be mixed to avoid chemical reactions.
3. Avoid direct sunlight and humid environment when storing.
4. Check the cleanliness of the oil before use and filter it if necessary.
5. Summary
The type selection of hydraulic oil directly affects the performance and service life of the equipment. Users should select the appropriate hydraulic oil model based on actual working conditions, equipment requirements and environmental conditions. For further information, it is recommended to consult a professional supplier or equipment manufacturer.
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