Operation and precautions for hydraulic universal test oil valve

Hydraulic universal testing machineIn the instruction manual, the experiment operator often sees opening the oil supply valve and then bulabula, opening the oil return valve and then bulabula. For those who often use hydraulic universal testing machines for testing, this is a simple and basic thing. People who have never operated a hydraulic universal testing machine can't understand what it means. Below, our company's technical engineers will share in detail the operations of the oil supply valve and the oil return valve:
When raising the test bench, the oil supply valve can be opened larger, so that the test bench can rise at a fast speed to reduce the auxiliary time of the test. When applying test force to the sample, you should pay attention to the operation. It must be adjusted according to the speed of the test force applied specified by the sample. It should not be too fast, causing the sample to be impacted and should not be closed without reason, causing the test force to instantly drop in the loading. This affects the accuracy of the test data. If the yield point or other tests of the test material is tested, the test force needs to be increased and decreased repeatedly, and the operation needs to be extremely high.
operateHydraulic universal testing machineWhen the test force is applied to the sample, the oil return valve must be tightened to prevent oil leakage. After the sample breaks, slowly open the oil return valve, remove the test force and return the cylinder piston to its original position.