YJG-600H/1000H Type Microcomputer-Controlled Electro-Hydraulic Servo Pressure Testing Machine

The YJG-600H/1000H type microcomputer-controlled electro-hydraulic servo pressure testing machine is specifically designed for conducting compressive strength tests (bearing capacity tests) on sewer grates, cast iron manhole covers, steel fiber concrete manhole covers, and recycled resin composite material manhole covers. The testing method complies with the test requirements stipulated in standards such as CJ/T3012—93, JC/T889—2001, CJ/T121—2000, and CJ/T948-2005.

Main technical indicators:
1. Maximum test force: 600H/1000kN.
2. Test force measurement range and accuracy:
Equivalent effective range: 2% – 100% FS, accuracy better than 1%.
3. Loading speed adjustment range: 0.1 – 25KN/S.
4. Effective test space: 1200*1200mm.
5. Deformation measurement range: 0 – 20mm.
6. Deformation measurement accuracy: 0.01mm.
7. Piston stroke: 300mm.
8. Protection functions:
a) Cylinder limit protection;
b) Hydraulic system overload relief protection;
c) Test force overload protection;
d) Overcurrent and overpressure protection, automatic shutdown protection upon test completion;

Advantages and Safety Protection Devices:
1. Low noise. At the maximum working load, the noise is below 50 decibels, basically in a silent state.
2. Pressure follows the load, saving energy by 70% compared to conventional equipment.
3. High control accuracy, with a control accuracy of one ten-thousandth (compared to conventional equipment with a control accuracy of five thousandths).
4. No control dead zone, the starting control point can reach 1%.
5. The oil circuit is highly integrated, with few leakage points.
6. When the test force exceeds 2%-5% of the maximum test force of each gear, overload protection occurs and the machine stops.
7. When the piston rises to the upper limit position, travel protection occurs and the oil pump motor stops.
8. Overload, overpressure, overheating, and overflow protection for the hydraulic oil circuit system.
9. Automatic shutdown protection upon completion of the test.