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Egmec Industry Co., Ltd. [China (Mainland)]
Business Type:Manufacturer, Trading Company, Agent
City: Ningbo
Province/State: Zhejiang
Country/Region: China (Mainland)
Hydraulic Cartridge Valves
The Three Concentric And Two Concentric Of Hydraulic Cartridge Type Pressure Relief Valves
There are two structures in the form of three concentric two concentric about hydraulic cartridge type pressure relief valves. The three concentric pilot relief belong to the early products still occupy a certain market share. Two concentric structure is more stable and reliable, and will gradually replace the pilot-operated relief cartridge valve of three concentric structure.
The three concentric pilot relief cartridge valves and two concentric pilot relief cartridge valves following distinction:
Three concentric pilot operated pressure relief cartridge valves, within its structure, the relatively large diameter of the small diameter cylindrical surface, located above the main spool and the spool central cylindrical surface, and pressure relief valve spool the bottom of the cone, these three surface and pilot operated relief valve base, valve housing bore and taper relief valve seat to ensure the state is concentric.
Such internal design structure called three concentric pilot-operated relief cartridge valve. Due to the need to ensure that the three parts of the concentric machining accuracy of product components proposed higher requirements, processing error is bound to affect the performance of the relief valve. In addition, this structural design of the assembly precision higher requirements.
For bad assembly products, the valve cover holes assembly errors will be jammed main spool, causing the pilot-operated relief cartridge valve operation is insensitive to other failure. Three concentric structure is relatively complex, the relief valve opening and closing characteristics are not as good as the pilot-operated relief valve of two concentric structure.
The two concentric hydraulic cartridge type pressure relief valve, structural design characteristics: the main spool cylindrical surface with cone both must remain concentric, called two concentric. The pilot - operated relief valve of two concentric relatively more simple structure, excellent , be reduced without affecting the performance requirements of the processing and assembly. Relief valve working stability has been improved significantly, and reduce maintenance difficulty and cost. Cartridge unit with the cartridge valve technology adoption more streamlined assembly maintenance work, the better versatility. At the same time compared to the traditional three concentric structure, hydraulic cartridge type pressure relief valve operatation noise of the two concentric relief valve is significantly reduced.
The three concentric pilot relief cartridge valves and two concentric pilot relief cartridge valves following distinction:
Three concentric pilot operated pressure relief cartridge valves, within its structure, the relatively large diameter of the small diameter cylindrical surface, located above the main spool and the spool central cylindrical surface, and pressure relief valve spool the bottom of the cone, these three surface and pilot operated relief valve base, valve housing bore and taper relief valve seat to ensure the state is concentric.
Such internal design structure called three concentric pilot-operated relief cartridge valve. Due to the need to ensure that the three parts of the concentric machining accuracy of product components proposed higher requirements, processing error is bound to affect the performance of the relief valve. In addition, this structural design of the assembly precision higher requirements.
For bad assembly products, the valve cover holes assembly errors will be jammed main spool, causing the pilot-operated relief cartridge valve operation is insensitive to other failure. Three concentric structure is relatively complex, the relief valve opening and closing characteristics are not as good as the pilot-operated relief valve of two concentric structure.
The two concentric hydraulic cartridge type pressure relief valve, structural design characteristics: the main spool cylindrical surface with cone both must remain concentric, called two concentric. The pilot - operated relief valve of two concentric relatively more simple structure, excellent , be reduced without affecting the performance requirements of the processing and assembly. Relief valve working stability has been improved significantly, and reduce maintenance difficulty and cost. Cartridge unit with the cartridge valve technology adoption more streamlined assembly maintenance work, the better versatility. At the same time compared to the traditional three concentric structure, hydraulic cartridge type pressure relief valve operatation noise of the two concentric relief valve is significantly reduced.
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