Screw-inserted electromagnetic hydraulic valve DHF08-232

1.Small actuator: it can reduce the cost and improve the circulation capacity;

2.Sleeve guide: sleeve guide is beneficial to centering, reducing friction, reducing noise and exchanging flow characteristics;

3.Balanced spool: in order to reduce the thrust or torque of the actuator, it is important to use balanced spool, which also improves the dynamic performance of the system;

4.Integrated valve core and valve seat: In order to overcome the shortcoming of poor sealing performance of the two-seat valve, the integrated valve core and valve seat made of the same material are used to form the valve internals, so as to minimize the leakage and unbalanced force at the same time;

5.Simple flow path: the flow path is simple and the flow resistance is reduced, which can not only reduce the pressure loss at both ends of the valve, but also reduce the cost;

6.Sealing and friction: sealing performance and friction performance are contradictory. In the design of control valve, not only the sealing problem should be solved, but also the performance indexes such as friction and life should be paid attention to. Therefore, the research on packing box and packing structure has been paid attention to, and rotary control valve has been widely used;

7.Noise reduction: adopt various methods to reduce the noise of control valve, for example, adopt noise reduction sleeve and valve core, adopt multi-stage valve core, adopt noise reduction current limiting plate, adopt expander, etc.

8.Adopting the control valve with the same diameter as the pipeline and the valve internals for limiting the flow capacity: it is beneficial to reduce the inlet pressure and outlet fluid flow rate of the valve, and it is not necessary to install additional pipe fittings such as reducer, which is beneficial to reduce the cost. By replacing the valve internals with large flow capacity, the flow capacity can be expanded, and the error of excessive calculation caliber can be corrected by selecting the valve internals for limiting the flow capacity;

9.In the era of digital information, intelligent valve positioner or digital controller will be used to realize the nonlinear law to compensate the nonlinearity of the controlled object, and the flow characteristics of control valve will be used less to compensate the nonlinearity of the controlled object.

10.The material of valve internals changes with temperature. Therefore, we should consider the influence of thermal expansion at different temperatures, the change of pressure grade at high temperature, and the corrosion resistance and fatigue resistance of materials.