Hydraulic Cylinder Common Tests

1. Cylinder Friction Test/ Starting Pressure

The cylinder friction test evaluates the internal cylinder friction. This simple test measures the minimum pressure required to move the cylinder at mid-stroke. This test allows you to compare frictional forces of different seal configurations and diametrical clearances to evaluate the cylinder's performance.

2. Cycle ( Endurance) Test

This test is the most demanding test for cylinder evaluation. The purpose of the test is to evaluate durability by simulating the life cycle of the cylinder. This test can be defined as continuing until the total number of cycles is reached or can run until a malfunction occurs. The test is conducted by stroking the cylinder at partial or full stroke underspecified pressure to simulate cylinder application. Test parameters include : velocity, pressure, stroke length, number of cycles, cycle rate, partial or full stroke, and oil temperature range.

3. Impulse endurance test

The impulse endurance test primarily evaluates the static seal performance of the cylinder. It also provides fatigue testing of the body and other mechanical components. The impulse endurance testing is conducted by fixing the cylinder into position and pressure cycling each side alternately at a minimum frequency of 1 Hz. This test is conducted at a specified pressure, until the specified number of cycles has been reached or a malfunction occurs.

4. Internal/ External Test or Drift Test

The drift test evaluates the cylinder for internal and external leakage. It can be completed between the stages of the Cycle(Endurance) Test or Impulse Endurance Test, or at any time specified by the customer. The condition of the seals and internal cylinder components are evaluated with this test.

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