1. Basic Concept of Pressure Units

The working capacity of a plunger cylinder is usually expressed in tons, while the pressure of a hydraulic system is commonly measured in Megapascals (MPa). Although the two units appear different, there is a direct conversion relationship between them: 1 MPa is approximately equal to 9.8 kg/cm², and 1 ton equals 1000 kg. Understanding this basic relationship is essential for subsequent unit conversion.

2. Conversion Formula between Tonnage and MPa

Core conversion formula: Tonnage = 3.14 × Plunger radius² × System oil pressure × 9.8 kg/cm²

Example: For a cylinder with a plunger diameter of 20 cm, the thrust generated under 16 MPa pressure is about 50 tons (3.14 × 10² × 16 × 9.8 ≈ 50T). Factors such as system efficiency shall be considered in practical application.

3. Common Application Scenarios and Notes

• Selection reference: Calculate required system pressure backwards based on target tonnage

• Safety verification: Ensure the equipment rated pressure is higher than the calculated value

• Error control: Take friction loss and resistance of sealing parts into consideration

• Unit consistency: Distinguish between international units and engineering units