The pilot valve is the auxiliary valve used to manipulate the control mechanism in other valves or components.The pilot valve itself is often a small specification control valve, mostly the pressure control valve.The pilot control liquid bridge is composed of fixed liquid resistance, which controls the main valve or secondary valve or variable bar according to the input signal; it can accept a variety of input methods, such as manual, electric, liquid, pneumatic, mechanical cam, electricity ratio, etc.
Priority valve quotation
(1) SANWO/Sanhe SVZ5220 pilot valve, material: brass, type (channel location): pilot type, connection form: thread ￥ 290.00 (2) Kang Stone 2L-50US-40US-50 pilot valve, material: brass，类型(通道位置)：二通式，连接形式：螺纹，流动方向：单向，公称通径：50(mm)￥320.00(3)NORGER/诺冠2623079先导阀，材质：铸铝，类型(Channel location): Pilot type, connection form: internal thread, flow direction: unidirectional, nominal diameter: 6 or 12 (mm) ￥ 450.00 (4) Kody ZCRH2W pilot valve, material: stainless steel, type (channel location):Two -pass, connection form: flange, flow direction: unidirectional, use: dead, nominal diameter: DN10 ~ 65 (mm) ￥ 550.00
The role of the pilot valve
When power -on, the electromagnetic force opens up the pilot hole, and the pressure of the upper cavity chamber drops rapidly. A low -high pressure difference between the closure parts is formed. The fluid pressure is promoted to move upward.The entrance pressure quickly forms a low and high pressure difference between the valve parts through the bypassing the cavity. The fluid pressure is pushed to move down the closure parts and close the valve.The role of the hydraulic system is to increase the force to strengthen the force.A complete hydraulic system consists of five parts, namely power components, execution elements, control components, auxiliary components (attachments) and hydraulic oil.The hydraulic system can be divided into two categories: hydraulic transmission system and hydraulic control system.The hydraulic transmission system takes power and movement as its main function.The hydraulic control system must allow the output of the hydraulic system to meet specific performance requirements (especially dynamic performance). Generally, the hydraulic system mainly refers to the hydraulic transmission system.
Pilot valve work principle
When working, the hydraulic pressure also acts on the measurement surface of the main valve core and the pilot valve core.When the pilot valve 1 is not opened, the oil in the valve cavity is not flowing, and the pressure on the two directions of the main valve core 6 is equal to the pressure, but the effective pressure area of ??the upper end surface A2 is greater than the effective pressure area of ??the lower end.The valve core is at the bottom position under the action of the joint force, and the valve port is closed.When the oil inlet pressure increases to the opening of the pilot valve, the liquid flowing through the damping hole on the main valve core 5. The pilot valve 1 flows back the fuel tank.Due to the damping effect of the damping holes, the pressure of the upper and lower directions that the main valve core 6 is suffered is not equal.EssenceThe regulating spring 9 of the pilot valve can be adjusted to adjust the overflow pressure.

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