The hydraulic control valve how to pick? Should also pay attention to what the problem? Various specifications of hydraulic control valve, the maximum pressure of the system can be and the actual flow through the valve (Richard) Figure Figure from the working conditions and system basis taking into account the characteristics of the valve control, stability and oil port size, dimensions, install the connection, manipulation methods, and select from the product samples or catalog. Jingyi Valve told us hydraulic hydraulic production system supporting all types of hydraulic control valve to select the following Note below:
First look at the actual flow of the hydraulic valve, the actual flow of the hydraulic valve and oil line series and parallel: the series oil line throughout the flow equal; flow is equal to the oil line flows and work in parallel oil passage. In addition, single piston rod hydraulic cylinder system, pay attention to the piston projecting and retracted back to the oil flow different: retracted when no the rod chamber oil return overhang rod chamber oil return flow ratio, and two cavity area ratio equal. Rated pressure of the hydraulic valve and the rated flow of hydraulic control valve rated pressure and rated flow is generally close to its use pressure and flow. For systems with high reliability requirements, the rated pressure of the valve should be higher than the pressure more. If the rated pressure and rated flow is less than the use of pressure and flow, easy to cause adverse impact of hydraulic clamping valve and hydraulic power and the quality of work; sequence valve and pressure relief valve in the system, through traffic should not be far smaller or easy to produce at the rated flow, vibration or instability. Flow valve, should pay attention to the minimum stable flow.
The second is the installation of the hydraulic valve connection, due to the installation of the valve connection a decisive influence on the subsequent design of hydraulic structure of the device type, so when selecting a hydraulic valve response to the hydraulic control unit integrated way to be aware of. For example, plate connected to a hydraulic valve, the valve can be mounted on the oil line board or MANIFOLDSHYDRAULIC of, on the one hand to facilitate the rationalization of system integration and hydraulics design, on the other hand to replace the hydraulic valve without dismantling tubing, installation and maintenance more convenient; If superimposed on the valve, you need to study according to the pressure and flow series spectrum superimposed valve selection, and so on.
Finally, the selection of the directional control valve, for the simple structure of the ordinary check valve, however, should primarily to note its opening pressure reasonable choice: a lower opening pressure, can reduce the resistance loss of the liquid flow through the check valve; However, for for a check valve of the counterbalance valve, the opening pressure higher to ensure sufficient back pressure. Note this paragraph valve pilot operated check valve, in addition, to avoid any abnormal vibration and noise, and attention should be paid a reasonable selection of its pressure relief: back when the pilot operated check valve exports exist pressure should use outflow type, and other optional within the vent style. Valve, should pay attention to meet the system requirements for automated and run cycle, reasonable choice of manual, mechanical, electromagnetic, electric hydraulic type actuated.
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