25/207300 Relief Valve For JCB Backhoe Loader Cartridge Counter Balance Check Valve

25/207300 Relief Valve For JCB Backhoe Loader Cartridge Counter Balance Check Valve

Specifiion
 

 
 
Description

Cartridge balance valve principle Working principle The check valve part allows the free flow of pressure oil into the cylinder, while preventing the reverse flow of oil. The pilot section can control the movement after the pilot pressure is established. The pilot part is usually set to be normally open, and the pressure is set to 1.3 times the load. The principle of the cartridge balance valve. The one-way valve section allows the free flow of pressurized oil into the cylinder while preventing reverse flow of oil. The pilot section can control the movement after the pilot pressure is established. The pilot part is usually set to be normally open, and the pressure is set to 1.3 times the load value, but the opening of the valve is determined by the pilot ratio.

For optimal load control and different power appliions, different pilot ratios should be selected.

The confirmation of the opening pressure value of the valve and the pressure value of the cylinder movement are obtained according to the following formula: pilot ratio = [(relief pressure setting) - (load pressure)] / pilot pressure.

The hydraulic control ratio of the balance valve is also called the pilot pressure ratio, which is generally called the pilot ratio in English. It refers to the ratio of the reverse opening pressure value of the balance valve when the pilot oil is 0 after the balance valve spring is set to a certain fixed value and the pilot pressure value when the balance valve with pilot oil is reversely opened.

In different working situations and environments, the selection of the pressure ratio is different. In the case of simple load and small external interference, a large hydraulic control ratio is generally selected, which can reduce the pilot pressure value and save energy.

In the case of large load interference and easy vibration, a smaller pressure ratio is generally selected to ensure that the pilot pressure fluctuation will not cause frequent vibration of the balance spool.

The balance valve with the hydraulic control ratio parameter is generally a cartridge-type balance valve, which requires the function of a load limiting protection circuit, so that when the reverse lock is performed, if the pressure rises a lot, it will automatically open for overflow.

Characteristic

1. Small size, can be installed in narrow space.
2. Since it is a cartridge type, it is easy to install and remove, and it has excellent maintainability.
3.100% Quality Inspection to Ensure High Peformance
4. Good Reliability&Durability,Long Service Life
5. Fast delivery with good price

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