Several types of direction control valves

1.Manual reversing yuken dsg-01 direction control valves:manual valve is use of the manual lever to change the spool position to achieve the reverse.

2.Motorized reversing direction control dsg-01-3c2 valves: also known as stroke valve, it is mainly used to control the movement of hydraulic machinery parts, which is the use of a block on the working table or cam to force thespool to move, so as to control the flow direction of oil. Motor reversing yuken dsg-01 valve is usually two position, there are two way, three way, four way and five way of two position directional control dsg-01-3c60 valve.Two position two way and two position three way directional control valve divided into common open and common closed.

3.Solenoid direction control dsg-01-3c2 valve: using the power of the electromagnet(on/off) to directly promote the valve core to control the oil port connected state.

4.Hydraulic reversing directional control dsg-01-2b2 valve

5.Electro hydraulic reversing valve: by the combination of electromagnetic valve and hydraulic directional control dsg-01-3c60 valve. Solenoid direction control valves play a leading role, it can change the direction of the flow, so as to change the position of the hydraulic directional control valve. Because of the hydraulic pressure of the hydraulic directional control valve can be very large, so the main valve can be great, allowing a greater flow through. Such a small electromagnet can be used to control large liquid flow.

6.Proportional solenoid direction control dsg-01-2b2 valve: the proportional direction control valves control the movement of the valve core with the electromagnetic force generated by the electromagnetic coil of the valve core, control the direction of the valve spool displacement by controlling the coil current, so that it can control the direction and flow of oil flow.

Matching problem of solenoid hydraulic valves power supply

Some time ago, a client of mine encountered a problem that hydraulic YUKEN DSG-03 solenoid valve can not be opened.24V power supply to 9 solenoid valves by switching power supply,use collinear supply power to 9 solenoid hydraulic valves at the same time,and control signal to control the action of an hydraulic dsg solenoid valve.But why do often solenoid hydraulic valves can not move? What is the reason?

Through the specific communication, we learned that customer use the 1.5 party line length of 230 meters, so it is not difficult to understand why the solenoid hydraulic valve does not move.Because the power supply voltage selection of 24V, we need to consider the loss, if the cable is too thin and too much, loss will be too large. When the power supply to the YUKEN DSG-03 solenoid valve coil, the voltage is only 16V, has been lower than the normal open voltage of 20V, leading to the solenoid valve coil can not act. There are 9 solenoid hydraulic valve at the same time, so that the terminal voltage and power must be guaranteed to the solenoid hydraulic valves.

How to measure the life of solenoid valves

The following 4 situations will hinder the normal work and shorten the life of the dg4v5 vickers valve :

1,The use of medium changes in the process.

2.Internal pipe rust.

3.Air compressor oil oxidation, resulting in carbon particles of tar and other debris mixed into the pipeline.

4.The dirt dust and other impurities in the pipeline.

Technical performance and specifications:

1.DG4V5 vickers valve in the 12bar constant pressure (can be set), on the highest 90 degrees Celsius hot water.

By requirements of different types of dg4v-5 hydraulic valve (such as 5S/5s for a time) for testing, the number of consecutive trials in 50000 times or so (can be set).

2.Test bench can automatically record the water valve coil through the case, can record the stop time on the middle of the failure of the water valve, but does not affect the work of other dg4v5 vickers valve.

3.Test rig can simultaneously detect 10 water valve.

4.The accuracy of pressure control is ±0.2 bar, the temperature control precision is ±1℃.

5.Solenoid dg4v5 vickers valves voltage is adjustable (12~300V)

6.Can be used as a test of low voltage pass performance.

Working principle of electro hydraulic control valves

Electro hydraulic reversing valve and hydraulic control valves are used in the hydraulic system which the flow over the normal operation of the solenoid hydraulic control valves to control the movement of the actuator or control the flow direction of the oil.

Notice of the electro yuken hydraulic valves

1.Products can be arbitrarily installed, priority level position.

2.The hydraulic system must be filtered by the media, filtration accuracy at least 20μm.

3.Fixed screw selection according to the parameters listed in the sample.

4.The roughness of the surface of the hydraulic control valve is required to Ra0.8, and the flatness is required for 0.01/100mm.

Working principle

When the two yuken hydraulic valves coil through the power, the balance hole circuit is closed, the discharge hole circuit is opened, the piston pressure relief, the piston upward, the valve opens. On the contrary, the piston down, the valve closes. In the yuken hydraulic solenoid valve opening and closing process, the flow rate signal and valve plug position signal is transmitted to the computer, after the computer processing to send out the corresponding command, control power down state of the two solenoid hydraulic control valves, so that the piston of the upper chamber of the hydraulic pressure difference, so that the piston control in the required opening height, to achieve the pipeline medium flow control.

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Selection of flow hydraulic directional control valves

According to the working condition of the hydraulic system and the characteristics of the dg4v-3 flow control valve to select the flow hydraulic directional control valves, in order to control the velocity of actuators.For example, the implementation of component requires for speed stability, but does not produce crawling, dg4v-3-6c speed hydraulic directional control valves should be selected. In the selection of the specifications of the hydraulic directional control valve, should pay attention to the dg4v-3-6c minimum stable flow rate valve, should meet the requirements of the minimum speed of the actuator, that is, the minimum stable flow rate should be less than the minimum flow required for execution components; if the flow stability requirements are particularly high, or for the case of micro feed, should choose the dg4v-3-2a temperature compensated type valve. In short, whether the choice of the dg4v-3-2c hydraulic directional control valve is correct or not has a great effect on the success or failure of the system.
As a hydraulic designer, should have a more comprehensive understanding of the production of dg4v-3-2a hydraulic directional control valves, in particular, the performance of various hydraulic directional control valves, the replacement of new and old products and replacement. Should also often go to the scene to understand the work of the dg4v-3 hydraulic directional control valve, the only way to achieve the correct and reasonable choice of hydraulic directional control valve.

Selection of pressure hydraulic direction control valve

Pressure hydraulic direction control dg4v3 vickers valve to control the hydraulic system pressure, therefore the selection should be based on the working state of the hydraulic system, the pressure on the requirements and vickers dg4v3 hydraulic direction control valve in the system to the function. For example, in the quantitative pump throttle speed control system, the speed of the implementation of components controlled by the throttle hydraulic direction control valve; in order to maintain the working pressure of the pump is basically constant, should use the dg4v3 vickers overflow hydraulic direction control valve to carry out the regulator overflow; in order to prevent the system overload, the pump can be used in parallel with an overflow valve, for the protection of the pump and the whole system; if there is a decompression circuit in the system, the vickers dg4v3 pressure relief valve must be used to reduce the high pressure circuit to low pressure; if the system uses the pressure to control the action sequence of the components, should use the sequence hydraulic direction control dg4v3 vickers, the pressure value of the sequence valve is set to the required pressure, thereby controlling the action sequence of the parts, and also can use the pressure relay to convert the liquid pressure to the electrical signal, to control the action sequence of the various parts; if you are required to perform the component stably, the back pressure valve should be set up in the loop to form a certain resistance to the oil, which can greatly improve the stability of the execution element. Overflow valve, sequence valve, check valve and throttle valve can be used for dg4v3 vickers back pressure hydraulic direction control valve.