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

     This testing machine is used to determine the compressive strength of building materials such as bricks, stones, and concrete.

     The machine features electro-hydraulic loading, sensor force measurement, digital force value display, printer output of force data, and conversion to compressive strength. It complies with the standard "Standard for Test Method of Mechanical Properties of Ordinary Concrete," requires manual control of loading speed, and is equipped with a loading speed indicator, peak hold function, and overload protection. It is an essential testing and inspection device for construction, building materials, highway and bridge engineering units.

II. 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 Plates:  350mm

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

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

7. Motor Power:                0.75KW

8. Input Voltage:                 380V

9. Overall Dimensions:          880×480×1400mm

10. Net Weight:                    950kg

III. 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 measurement instrument.

1. Body Section

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

An adjustment screw is mounted on the upper beam, and a large handwheel and nut screw allow adjustment of the machine's no-load height. The lower end of the screw is equipped with a spherical 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 spherical seat self-adjusts for balance, keeping the specimen level with the upper and lower plates. The lower pressure plate has engraved positioning lines; specimens must align with these lines during testing. A dust cover below the lower plate prevents or reduces dust entry into the cylinder during piston movement, protecting the cylinder and oil seals. A sealing device between the piston and cylinder prevents oil leakage. If minor leakage occurs during use, an annular oil groove in the cylinder and an oil discharge channel allow oil to return to the main tank.

2. Hydraulic Section

The main components of this testing machine include the oil tank, oil pump, oil filter, motor, speed valve, and return oil valve. The oil pump is a direct-drive axial five-piston pump. During loading, the loading speed valve should be manually controlled to regulate the piston's ascent speed (this valve is integrated with the safety valve). For unloading, turning the return oil valve allows the cylinder to descend slowly. The safety valve is preset at the factory and should not be adjusted by the user during normal operation.