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.

BSTIND Hydraulic valve magnetic casing welding workshop

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.

Working principle of hydraulic solenoid valve

Bosch Rexroth 4WE10 hydraulic solenoid valve is a kind of automatic basic components which used to control the flow, belonging to the actuator.Directional hydraulic control valve used to control the direction of hydraulic flow, the plant’s mechanical devices are generally controlled by hydraulic cylinder, so it will be used in directional hydraulic control valve.
The Bosch Rexroth 4WE10 hydraulic solenoid valve has a closed cavity, in which the different position of the hole, each hole connecting different tubing.The middle of the cavity is the piston, the two sides are two magnets, which the magnet coil on the body will be attracted to the side, through the directional hydraulic valve to open or close the directional hydraulic control valve to open different oil drain hole.And into the hole is open, the hydraulic oil will enter a different row of tubing, and then through the pressure to promote the piston, the piston and the piston rod, the piston rod drives the mechanical device.Thus through the current control of an electromagnet to control the mechanical movement.

Disadvantages of hydraulic directional control valve

1.Regulation accuracy is limited.

4WEH Rexroth hydraulic solenoid valve is usually only switch two kinds of state, the valve core can only be in the two limit position, can not be adjusted continuously. A lot of new ideas to break through, but still in the trial stage, so the adjustment accuracy is also subject to certain restrictions.

2.Flow medium

The 4WEH Rexroth hydraulic solenoid valve on the media have high requirements for cleanliness, including granular media can not be applied, if must first filter out impurities.In addition, the viscous medium can not be applied, and the specific product is suitable for the medium viscosity range is relatively narrow. But some of these shortcomings can be avoided by selecting.

Directional control valve selection

According to the requirements of the system to select the type of rexroth 4we6 hydraulic solenoid valve.For example,it should select one-way valve while the demand for oil flow can only flow in one direction, and can not reverse flow; if the required execution element is completed in a stop working cycle, the three bit reversing valve should be selected; if only needs two kinds of working state, namely the feed and return, then should use two position reversing valve, turn on or off the oil;If the actuator to complete the ‘fast forward, forward, rewind, stop’ the work cycle, or reciprocating frequent movement should normally be select the reversal valve to transform the oil flow direction.
You can also select rexroth 4we6 hydraulic solenoid valve according to the working status of the system and the characteristics of the valve. For example, the quality of the moving parts is small, the accuracy requirements are not high, the flow is less than 63 L / min, should choose the rexroth 4we6 hydraulic solenoid valve, because of the impact of this rexroth 4we6 hydraulic solenoid valve is large, so only the small flow allowed; If the moving parts quality, speed range is larger, and require to reverse smoothly, flow work energetically 63 L / rain, should use the electro-hydraulic valve; if the system has a lock loop, should choose the hydraulic control one-way valve with good sealing performance, but not the choice of sealing of the reversing valve.

Working principle of hydraulic solenoid valve

Bosch Rexroth 4WE10 hydraulic solenoid valve is a kind of automatic basic components which used to control the flow, belonging to the actuator.Directional hydraulic control valve used to control the direction of hydraulic flow, the plant’s mechanical devices are generally controlled by hydraulic cylinder, so it will be used in directional hydraulic control valve.
The Bosch Rexroth 4WE10 hydraulic solenoid valve has a closed cavity, in which the different position of the hole, each hole connecting different tubing.The middle of the cavity is the piston, the two sides are two magnets, which the magnet coil on the body will be attracted to the side, through the directional hydraulic valve to open or close the directional hydraulic control valve to open different oil drain hole.And into the hole is open, the hydraulic oil will enter a different row of tubing, and then through the pressure to promote the piston, the piston and the piston rod, the piston rod drives the mechanical device.Thus through the current control of an electromagnet to control the mechanical movement.

Common malfunction and troubleshooting of rexroth hydraulic valves

1.Rexroth hydraulic valve is not working:

Check the power supply wiring is connected to the adverse or not → Rewiring and connectors;

Check whether the power supply voltage is within the scope of the work or not → Transfer to normal range;

Check whether the coil is connected or not → Re welding;

Coil short circuit → Replacement coil;

Whether the working pressure difference of inlet metering pump is appropriate or not →Adjust the pressure difference or replace the appropriate rexroth hydraulic valves;

Fluid temperature is too high → Replace the appropriate rexroth hydraulic valves;

There are impurities make the main valve core and the valve core card stucked → For cleaning, if there is a seal damage should be replaced the seal and installed filter;

The liquid viscosity is too large, the frequency is too high and the life has been reached → Replace products.

2.Rexroth hydraulic valves can not be closed:

The main spool or the seal of the moving iron core has been damaged → Replace seal;

Fluid temperature, viscosity is too high → Replacement of rexroth hydraulic valves;

There are impurities into the solenoid valve spool or moving iron core →Wash;

Spring deformation or service life has been reached → Replace spring;

Throttle hole balance hole plug → Timely cleaning;

Working frequency is too high → Replace products or updates.

3.Other conditions:

Internal leakage → Check seal for damage → Whether the spring assembly or not;

External leakage → The connection is loose or the seal is broken → Tighten the screw or replace the seal;

When power is a noise → The head fasteners loose, tighten;

Voltage fluctuations are not allowed within the range → Adjust the voltage;

Core pull impurities or uneven surfaces → Timely cleaning or replacement.

Classification of solenoid directional valve

Variety of 4we4-60 bosch hydraulic valves, according to the number of its working position and the number of channels can be divided into two position three way, two position four way, three position four way and so on; according to its reduction and positioning can be divided into the form of the spring, steel ball positioning, no reset spring type; according to the connecting form of the body and the electromagnet can be divided into flange connection and screw connection; according to the structure of the distribution of its power can be divided into dry and wet type, each type has AC, DC, the whole and other forms, and there are many kinds of power supply voltage, so there are many differences in its structure.

1.Classified by the number of interfaces and the number of switches.Interface refers to a variety of connection which tubing into and exit connecting line on the bosch hydraulic valves, the oil inlet is usually labeled as P, the oil return port is R or T, and the oil outlet is represented by B and A. Rexroth directional control valve core can be moved by the number of positions known as the number of the switch position, usually we will be called “pass”, the position of the rexroth directional valve core is called “position”. Therefore, according to the number of its working position and the number of the number of channels can be divided into two position three way, two position four way, three position four way and so on.
2.Classification by operation.To promote the rexroth directional control valve movement of the hand, foot, mechanical, hydraulic, electromagnetic and other methods.
3.Classification according to its reduction and positioningIt can be divided into the spring type, steel ball positioning, no reset spring type.
4.Classification by structure of electromagnetCan be divided into dry and wet type.

Installation and maintenance of solenoid valve

Miniature hydraulic valves is one of the valves used in the automatic control system, it gets the user’s consistent favor because of low price, simple operation, convenient and reliable(it can directly accept the PLC or DCS switch quantity control signal). We will simply explain what you need to pay attention to while the installation and the maintenance of ng3 valve below.
Installation notes:
1.First check if the miniature hydraulic valves is consistent with the selection parameters, such as power supply voltage, medium pressure, pressure, etc.. Especially the power, if wrong, it will burn out coil. Power supply voltage should meet the voltage range of voltage fluctuation range: AC +10%~-15%, DC +10%~-10%, usually the coil assembly is not open.
2.To flush the pipes before taking over, remove metal powder, seal material, rust and dirt in the pipe. Need to pay attention to the medium cleanliness, if the medium mixed with dirt and impurities that impede the normal work of the ng3 valve, the filter or strainer should be installed in the pipeline.
3.miniature hydraulic valves solenoid coil components should be installed vertically in the horizontal pipe. If you are subject to space constraints or other conditions have to installed it on the side, need to be put forward in order.Otherwise it may cause the solenoid valve does not work.
4.Manual shutoff valve should be added before and after the ng3 valve,and should be set to bypass, easy maintenance.
5.Hydraulic directional valve is generally oriented, cannot be reversed. Usually mark on the valve body with an arrow indicating the direction of the flow of the media, it should be installed in accordance with the direction of the arrow. But in the vacuum line or special circumstances can be reversed.
6.If the medium caused a water hammer effect, then you should use the miniature hydraulic valves with prevent water hammer effect function or take corresponding preventive measures.
7.Don’t let the ng3 valve is energized for a long time, it is easy to reduce the service life of the coil and even burn the coil.
8.The inlet side of the steam hydraulic directional valve shall be provided with a steam trap, which shall be inclined to take over.

About BSTIND

#BSTIND,as known as Ningbo Best Industrial Co.,Ltd is professional in designing and manufacturing,sales of #HydraulicValve. #Factory With more than 20000 square meters workshops.And there are about 300 workers and 50 among which are senior or intermediate technical engineers. BSTIND had passed #ISO9001:2008 and #CEcertificates.Annual production is selling about 0.6 millions hydraulic valves.
Main products including: Hydraulic Directional Valves,Manual Hydraulic Valve,Modular Valve,Pressure Release Valve,Cartridge Solenoid Valve,Cartridge Relief Valve,Cartridge Check Valve, Counterbalance Valve,Flow Control Valve,Log Splitter Valve,Manifold Block and so on.
Production line have dozen of #CNC centers,CNC lathe,internal-grinder machines,external-grinder machines,CNC quilting mill,dozen of testing machine and other production advanced machines, design and engineering facility include Solid-works, ProE and Auto-CAD.
BSTIND had applied the PPAP Product Control of TS 16949 Standard, and products are 100% qualified before delivery. All the standard products must tested for millions of times before leave factory.
BSTIND pay attention to every detail of products and service,make sure products with zero defects, In order to win good reputation of customers around the world, BSTIND Always Optimization Products and services.At the same time,expanding market share to support distributors with more value-added services and get more trust from the end user.
BSTIND will always provide high quality products, good service, reasonable prices from now on.BSTIND Forward with you Hand in hand and along with the progress in the world.