The operating temperature of a standard hydraulic system is typically between 30°C and 70°C (86°F and 158°F).
The recommended temperature range for the fluid temperature is within this range.
The lowest limit is -30°C (-22°F), while the highest limit should not exceed +90°C (194°F).
It is important to use a fluid that is capable of withstanding these temperatures.
What is the Operating Temperature of a Standard Hydraulic System? (7 Key Points)
1. Hydraulic Oil Properties
The hydraulic oil used in hydraulic systems, such as the KINTEK presses mentioned in the reference, has good thermal and chemical stability.
This oil minimizes sludge formation and provides excellent performance.
2. Ambient Temperature Considerations
In laboratory platen presses where the ambient temperature is around 20°C (68°F), the oil is never used at the operating temperature of 60°C (140°F).
At higher temperatures, the degree of moisture in the oil increases, leading to increased compressibility and a higher risk of corrosion.
3. Hydraulic Oil Storage
Only half of the hydraulic oil is stored in the hydraulic tank, while the remaining half is stored in various components of the hydraulic system such as the pump, motor, manifold, cylinder, and pipes.
Therefore, it is important to consider the overall temperature of the system and not just the temperature of the hydraulic tank.
4. External Closed-Loop Water System
In the case of an external closed-loop water system, the water pressure on the pump module can vary.
After purging the system of air and with makeup water functioning, the suction side pressure of the circulating pump is typically between 12 and 18 psi.
The discharge side pressure will vary depending on the pump curve and specifications.
Overcharging the system with water can result in higher suction side and discharge side pressures, but this does not necessarily mean that more water is flowing and can be detrimental to cooling as it generates heat.
5. Hydraulic Fluid Temperature Limits
In terms of the hydraulic fluid temperature, it is recommended to not exceed 50 degrees Celsius (122 degrees Fahrenheit).
Higher temperatures can be detrimental to the performance and longevity of the hydraulic system.
6. Air Formation in Hydraulic Fluid
Air formation in the hydraulic fluid can cause noise and vibration, disrupting the speed balance of the system.
Therefore, it is important to ensure that the hydraulic fluid is free from air.
7. Hydraulic System Applications
Hydraulic systems operate under high pressure, requiring solidly produced circuit elements, which can result in higher costs.
A hydraulic press machine is used for various tasks such as crushing, flattening, compressing, gluing, molding, and coating materials.
It operates by placing the materials on a plate or bed inside the press machine and using hydraulic pressure to apply force.
Hydraulic press machines have a wide range of applications in different sectors of the industrial field.
Temperature isostatic pressing technology, which involves the use of hydraulic presses, is typically carried out at temperatures ranging from 80°C to 120°C (176°F to 248°F), and in some cases, temperatures can reach 250°C to 450°C (482°F to 842°F).
Warm isostatic pressing uses a special liquid or gas as the pressure transfer medium, typically at temperatures between 80°C and 120°C.
The pressure for temperature isostatic pressing is around 300MPa.
When using a rubber laboratory press, certain preparations need to be made.
These include checking the hydraulic oil quantity, which should be at least 2/3 of the height of the lower frame.
If the oil quantity is insufficient, it should be added in time.
Lubrication between the column shaft and the guide frame should also be checked and refueled if necessary.
The power supply should be turned on, and the operating handles should be closed to prevent oil return.
Pressing the motor start button will cause the oil to flow from the oil pump into the oil cylinder, driving the plunger up.
The oil pump will continue to supply oil when closing the hot plate until the oil pressure reaches the rating, at which point the press stop button should be pressed.
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