I. 300-ton/3000KN Fully Automatic Pressure Testing MachineMain Technical Parameters

1.   Load:                    3000KN

2. Indication Accuracy:               Grade 1

3.          Resolution:           0.1KN

4. Distance Between Pressure Plates:      350mm

5. Upper and Lower Pressure Plate Specifications:     300×250mm

6. Piston Diameter*      Stroke: Diameter 290×80㎜

7. Motor Power:               0.75KW

8. Input Voltage:                 380V

9. Overall Dimensions:            880×480×1400㎜

10. Net Weight:                    950kg

II. 300-ton/3000KN Fully Automatic Pressure Testing MachineStructure Overview

The testing machine mainly consists of three parts: the body, the hydraulic control box, and the force measuring instrument.

1. Body Section

The testing machine body is connected by four columns linking the cylinder block and the upper beam.

On the upper crossbeam of the testing machine, an adjustment screw, a large handwheel, and a nut screw are installed to adjust the no-load height of the testing machine. The lower end of the screw is equipped with a ball seat and an upper pressure plate. The lower pressure plate is placed on the piston of the oil cylinder. When the specimen contacts the upper pressure plate, the ball seat of the upper pressure plate can self-adjust for balance, keeping the specimen level with the upper and lower pressure plates. The lower pressure plate is engraved with positioning lines for the specimen; during testing, the specimen must be aligned with these lines. Below the lower pressure plate, a dust cover is installed to prevent or reduce dust from entering the oil cylinder during piston movement, which could damage the cylinder or oil seal. A sealing device is installed between the piston and the oil cylinder to prevent oil leakage. However, if a small amount of oil still leaks during use, an annular oil groove at the top of the cylinder and an oil discharge channel will direct the oil back to the main oil tank.

2. Hydraulic Section

The main components of the testing machine's hydraulic box include the oil tank, oil pump, oil filter, motor, speed valve, and return oil valve. The oil pump is a direct-rotation axial five-pillar pump. During loading, the loading speed valve should be manually controlled to regulate the piston's rising speed (the speed valve and safety valve are integrated). During unloading, the return oil valve can be turned to allow the oil cylinder to descend slowly. The safety valve has been pre-set to an appropriate position before leaving the factory; under normal use, users should not adjust the safety valve.