The maximum temperature for a hydraulic system can vary significantly depending on the specific application and the materials used in the system. From the provided references, we can identify several temperature thresholds relevant to different components and conditions within hydraulic systems.
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Heat Transfer Fluids and Materials: In systems where temperatures exceed 120°C, a special heat transfer fluid like Syltherm is required. The materials in contact with the fluid, such as tubing and hose barbs, must be capable of withstanding prolonged use at temperatures up to 200°C. Examples of suitable materials include viton, PTFE, and PFA. Silicone tubing is not recommended for use with high-temperature fluids like Syltherm.
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Operational Temperatures in Specific Machines: The plate vulcanizing machine mentioned operates with an electric heating temperature control system that can be adjusted within a range of 20-200 degrees. This indicates that some hydraulic systems are designed to operate at temperatures up to 200°C under controlled conditions.
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Hydraulic Fluid Sensitivity: Another reference points out that the hydraulic fluid is sensitive to high temperatures, and the temperature should not exceed 50 degrees. This suggests that for certain hydraulic systems, particularly those involving oil as the hydraulic fluid, the operational temperature must be kept relatively low to prevent degradation of the fluid and potential system failures.
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Extreme Industrial Loads: In industrial settings, particularly during tests involving exchangers, temperatures as high as 600°C (1112°F) have been noted. However, these temperatures are likely for specific components under extreme conditions and not representative of typical hydraulic system operations.
In summary, the maximum temperature for a hydraulic system depends on the specific components and the fluid used. For general hydraulic systems using oil, the temperature should not exceed 50 degrees to prevent fluid degradation. However, in specialized systems using high-temperature resistant materials and fluids, operational temperatures can reach up to 200°C. Extreme conditions in industrial testing can see temperatures as high as 600°C, but these are not typical operating conditions for standard hydraulic systems.
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