B YAW Series Computer Control Electro-hydraulic Compression Testing Machine

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Main functions
This series are used for compressive strength test of building materials, such as the specimen and component of cement, concrete and so on. Equipped with special auxiliaries, it can be used for bending resistant test of building materials and compression resistant test of red bricks. We can evaluate result parameters stated in related standards. They are perfect testing instrument for building project detection department, quality testing section, universities and colleges, research institution and industrial and mining enterprise.
Product features
Host machine is with double column type, which make the conformation compact and arrangement reasonable.
Adopt precise electro-hydraulic servo proportional valve. The speed is fast and the controlling accuracy is high.
Mechanic limit pistons protection assures the safety of testing.
Setup overload  protection which acn stop automatically,when
the load exceeds the maximum by 2-5%.
Controlling system
This machine is with digital and multi-channel loop of measuring and controlling system. It adopts force closed loop control technique and has the function of constant stress loading and load keeping. Loading speed can be arbitrarily set and the testing curves can be real time displayed.
Characteristics of software

The software integrate bending resistant test and compression resistant test procedure , such as bricks, cement, concrete and mortar.
The software divide testing procedure as follows: tile compression resistant executive program(GB13544—2000), cement compression resistant testing program (GB17671—1999), concrete specimen testing program(GB/T5001—2002)and mortar testing program(GB170—90).      
There is no subsection in all process. (Or classify according to the requirements of customers.)
Complete test in batch automatically and adjust breaking of specimen.
Windows Style can be controlled by human or computer.It is easy to manage and control,collect and calculate.
Record and save testing datas automatically.

Main Technical Specifications






Measuring range of






Accuracy of testing force


Subsection of force


Accuracy of constant



Loading speedkn/s


Accuracy of

loading speed


Upper platen size  (mm)





Lower platen size  (mm)





Distance between two

platens (mm)





Maximum piston

stroke (mm)





Power supply


Working environment


Shape of machine

Double column

Large space, Double column

Overall dimensionmm

Host machine













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Q:How can the frequency converter and the electric contact pressure meter be connected?
You can use a multimeter before starting to start out a line close point for inverter (low voltage to low voltage pointer must be required to adjust), but do not use inverter panel wiring, control operation, until the pointer pressure gauge pressure to coincide, volume out of a closed point, so that you can find public line. Then access to the converter can be put into normal operation.
Q:What is the actual value of the pressure gauge mounted on the pressure vessel?
The pressure indicated by the pressure gauge is the table pressure, and the absolute pressure should be the indication of the pressure of the watch, plus an atmospheric pressure.
Q:The working principle of the Bourdon tube pressure gauge
Bourdon tube pressure gauge is spring tube pressure gauge.Its working principle is that:The working principle of the spring tube type pressure gauge is spring tube; under the action of pressure, the free end displacement, the displacement of the rod drives the transmission amplification mechanism, the pointer deflection, and indicate the pressure value on the scale.Bourdon tube pressure gauge is mainly composed of a threaded joint holder, spring tube, rod, screw, gear sector, small gear, hairspring, pointer, upper and lower clamping plate, dial, case, shell etc..The function of each component in the drive amplifier mechanism:(L) pull rod - transfer the displacement of the free end of the spring tube to the sector gear;(2) the sector gear converts the line displacement to angular displacement and then passes it to the pinion and has an amplification effect;(3) the pinion drives the coaxial pointer to rotate, indicating the measured pressure on the dial;(4) - the gossamer fan gear and small gear tooth profile keep one-way contact clearance contact two gear, in order to reduce the return difference;(5) adjusting the screw - changing the position of the adjusting screw can change the length of the short arm of the sector gear, so as to change the drive ratio;(6) the upper and lower clamping plates fix the components together to form a set of transmission mechanisms.The drive mechanism, also known as the movement, is the heart of the pressure gauge. Its function is to enlarge the displacement of the free end of the spring tube so as to achieve the purpose of easy reading.
Q:The pressure gauge is red, yellow and green to indicate the pressure. When the needle points to the green area, what does it mean?
The pointer in the green area or yellow area represents the extinguisher pressure enough to be used properly. In the red area, it's time to change.
Q:How do you recognize the pressure gauge?
To recognize the pressure gauge units, the general units are Mpa, mbar, bar, PA, and so on. Then see where the pointer points.
Q:There is no pressure gauge in the process of adding fluorine to the air conditioner
Methods: fluoride 1. will be the first operation of air conditioning in the cooling mode, the fluoride mouth with Freon tank on one end of the tube with fluorine and fluoride, the other end tube (with fluoride thimble tube), installed in the low-voltage end of outdoor unit of air conditioner (suction tube) fluoride mouth. 2., open Freon tank plus fluorine valve on the mouth, can directly add fluorine to the air conditioning, fluorine amount of how much, should refer to the air conditioning nameplate marked "fluoride charge" for fluorine. Quantitative filling with scale. After the fluorine is finished, turn off the valve on the Freon tank and the fluorine nozzle, and let the air conditioner continue to operate. To observe the effect of air conditioning refrigeration, such as air conditioning to achieve normal cooling effect, low end remove outdoor machine (suction) plus fluoride mouth of fluoridation pipe, tighten the cap, and the mouth of the air conditioning fluoride can be used normally
Q:Band sawing machines sometimes fail to rise, sometimes very slowly, and sometimes pressure gauges have no pressure
For many reasons, there may be oil change or insert the owl problem, to find the best manufacturers see sawing machine.
Q:How does the air conditioning pressure gauge add readings?
The lower right corner, 2.5 below, has a "Mpa", which indicates the inner ring black. The number of units is "Mpa", that is, "MPa", the pointer pointing to 0.5, read as 0.5 MPa, and if it points to 2, then read as 2 mpa. 0.5 MPa, =5 pressure, 2 MPa, =20 pressure.
Q:Could you tell me why oxygen cylinders require two pressure gauges?
0-0.3MP is a low pressure meter, which is an oxygen pressure reducer. It converts the high-pressure oxygen into a uniform low-pressure oxygen through the knob handle to supply welding or cutting. 0.3MP's pressure is very common.0- 4MP is a high pressure oxygen meter. The oxygen bottle allows 15MP gas to be filled. This is the gas left in the cylinder at present, 4MP. High pressure makes gas cylinders fill more gas.
Q:Is the boiler pressure gauge mandatory?
The use of pressure meter of boiler has its special requirements, because the security level of the boiler is high, prone to burst pipes, excessive temperature and pressure, the drum is the key equipment, so the more stringent requirements than the general pressure gauge. Considering the safety of the boiler, steam boiler and national mandatory requirements, the pressure gauge must be per package the first half of the test once, also must have the qualification of certification institutions. At the same time, the pressure gauge requires a large dial of 250. In fact, not just the boiler requirements, other types of pressure vessels have such requirements.

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