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Hydraulic solenoid valve does not seal tightly mainly has the following several aspects:

1.Elastic sealing material. The elastic sealing material according to the different media for supporting the design, this is not a problem, such as PTFE, EPDM, FKM, but the price gap is large, of course, here refers to the purity of the monomer which material proportion of more than 95%, most of them are refurbished material, the purity is not enough, and there is no guarantee that the chemical and physical properties will change, which is easy to lead to long-term dissolution of the medium with the media leakage.
2.Flexible sealing processing accuracy. The machining accuracy for miniature solenoid valve control precision and the elastic component of it, but if it is large diameter solenoid valve elastic shape of the component is not small, water, etc. will shrink, gate product flatness, roughness directly affects the current, abroad are integral forming, laser cutting, so that forming. Of course, this set of processing equipment investment is huge, the general factory can not do this. Since it is not smooth, it is easy to leak.

3.Machining precision of metal sealing contact surface and structural design. Of course, we can not say which design is best, can only be used in conjunction with the use of their elastic components, but the accuracy must be required, how much is the roughness, and what kind of material processing on such small contact end face? If the design of the end face is too large, will impact the flow rate, and it is easy to stuck crystal, dust and other fine particles on the elastic components, so it is easy to cause leakage, and will be more after a long time. But the cone seal design will not be such a problem, the contact surface is small, the flow rate is quick, but the flow will be very big in this kind of structure.

4.Plunger assembly welding. The general shape of the plunger assembly is small, the requirements of argon arc welding and laser welding are relatively high, one is to ensure the production capacity, but also to ensure the quality, this material is also relatively high demand, corrosion and oxidation medium will lead to weld point corrosion, has great influence on the air tightness.

BSTIND 4WE10 Rexroth Hydraulic Valves

Standard flow of 4WE10 bosch rexroth hydraulic Valves is 120l/m,and working pressure of hydraulic direction valve is 32Mpa,the same as NG5 valve and Cetop5 valve. 4WE10 rexroth type directional valve usually used on hydraulic power,hydraulic work system and industrial hydraulic equipment.

4/3, 4/2 directional valve with wet-pin DC or AC voltage solenoids
Size 4WE10 has Hydraulic Solenoid Valve
Component series has 3X (30~39),4X (40~49)
The maximum operating pressure is 315 bar
The maximum flow is 120 l/min

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Low temperature solenoid directional valve is widely used in natural gas, liquefied gas pipeline, and its role as same to other varieties of solenoid operated hydraulic control valve are as for the normal transport of the gas medium in the pipeline, necessary to cut off and the role of regulation on the flow. The low temperature solenoid operated hydraulic control valve is used in a number of highly flammable gas pipeline, so in the connection of the pipeline, need to ensure that the gas will not leak. The main reason of low temperature solenoid valve leakage is:

There are two reasons for the leakage of low temperature solenoid operated hydraulic control valve, firstly the main reasons is the seal deformation in the low temperature state. When the temperature of the medium is decreased, the volume change is caused by the phase change of the material, and the sealing surface with high grinding precision is produced to cause warpage, leading to the bad sealing. Two is the external leakage. It is mainly due to the flange connection between low temperature solenoid valve and pipe, due to the connection pad, connecting bolts, and the connection between the material at low temperature shrinkage caused by the relaxation of the gap and lead to leakage. Therefore, the connection mode between the valve body and the pipeline can be changed to the welding structure, then the low temperature leakage can be avoided. Another is the stem and packing leakage. These are the main reasons for the leakage of low temperature solenoid operated hydraulic control valve.

BSTIND 4WE6 Directional Valves

Working pressure of rexroth 4WE6 Directional Valves is 32Mpa,the same as NG3 valve and Cetop3 valve. 4WE6 directional valve are usually used for changing the oil flow direction of hydraulic power,hydraulic working system and industrial hydraulic system.
4/3, 4/2 4we rexroth Type WE directional valves take use of wet-pin DC or AC voltage solenoids.
Size 6 Hydraulic Solenoid Valve
Component series is 6X (60~69)
The maximum operating pressure is 350 bar
The maximum flow is 80 l/min-DC Voltage Solenoids.
60 l/min using AC Voltage solenoids.

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There are five ways to connect the hydraulic valve.

1.Threaded Connection

The valve on the valve port of the valve body is called a tube valve. The oil outlet of the tube valve is connected with a threaded pipe joint, and is fixed on the pipeline. This connection is suitable for small flow simple hydraulic system. The utility model has the advantages of simple connection mode and convenient layout. The disadvantages are that the components are scattered, the space is large, the pipeline is staggered, and the joints are various, which is not convenient for loading and unloading.

2.Flange Connection

It is connected with a flange at the end part of the pipe body through a screw hole on the valve body (usually 4 screw holes). This type of valve is called flanged connection valve. Suitable for large flow hydraulic system with a diameter of 32mm or more.The advantages and disadvantages is same to thread connection.

3.Plate Connection

Each valve port of the valve is arranged on the same installation plane, and the connection is provided with a screw hole, this valve is called plate type valve, such as an solenoid reversing valve. Fix the plate type valve on the flat plate or valve block type connection body which has corresponding oil outlet with screw. This connection has the advantages of convenient replacement of components, no influence of pipelines, and possibility of centralized arrangement of valves. The connecting body connected with the plate type valve is provided with two forms of a connecting plate and an integrated block.

4.Stack Connection

The bottom surface of the various hydraulic solenoid valves are done as the bottom of the plate valve, in the connection surface of the various hydraulic valves of same specifications,the position of the oil port, the position of the screw hole and the connection size are all the same (according to the connection size of the same specification of the reversing valve), this valve is called stack valve. According to the requirements of the system, the same specifications and the various functions of the stack valve to stack up in a certain order, can form a stack valve type hydraulic device. The bottom of the stack valve type hydraulic device is generally the bottom block, and the bottom block is provided with an oil inlet P, oil return port T and an oil port A, B and a pressure gauge oil port which are connected with the actuating element. A stack valve group generally controls an execution element. If there are several executive components in the system need to be centrally controlled, several vertical stacking valve group can be arranged side by side on the multi floor. Inter element connections of the hydraulic system with stack valve do not use the tube, either use other forms of connectors, which has the advantages of compact structure, small volume, low pressure loss and leakage loss of the system, especially the change of hydraulic system is more convenient and flexible. The stack valve is a standardized component, can be assembled only by drawing the schematic diagram of the stack valve hydraulic system, so the design workload is small, widely used.

5.Cartridge Connection

The valve is made into a cylindrical element (which valve body is removed) – cartridge valve. The cartridge solenoid valve is directly inserted into the socket hole of the valve block with holes, constituting the hydraulic system. Its structure is very compact. All kinds of pressure valve, flow valve, directional valve, proportional valve can be made into the cartridge valve.

DG4V5 vickers solenoid valve

Max. pressure 315 bar (4500 psi)
Max. flow rates Up to 120 L/min(32 USgpm),
dependent on spool
Mounting surface ISO 4401 size 05
NFPA D02
DIN 24340 (NG10)

Four-port solenoid operated directional control Vickers DG4V5 valves with four-land spool design,so as to to facilitate of smooth, and response to variable speeds.

The range including:

AC and DC wet-armature solenoid options with ISO 4400 (DIN 43650) electrical connections and manual overrides.
Variable speed changeover potential in all DC models;

More spool types:with spring-offset, spring-centered and detented arrangements.

DG4V5 vickers hydraulic solenoid valve is compatible to fluid :

AC or DC-voltage models is suitable for petroleum oils, water-in-oil (invert) emulsions or phosphate esters. AC-voltage models can be used on water glycols.

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1.Tile pressure machine must use high pulse input function, high input of excellent performance, strong anti-interference ability of AB phase. And the use of fixed value interrupt function to ensure accuracy.
2.The detection part of the tile press machine: pulse encoder for detecting color steel tile length, the up and down switch of tile pressing, the up and down switch of cutter, the up and down operation button of tile pressing, the up and down button of cutter, emergency stop switch, hydraulic on-off switch etc..
3.The machine is equipped with a frequency converter drive motor, a hydraulic station motor, two solenoid directional valves for tile pressing, and two hydraulic solenoid valves for cutter.
4.PLC with 14 input /10 relay output, just to meet the input and output requirements. With KDN text screen, you can complete the parameter settings, alarm display, production data display, etc..

DSG-01 / DSG-02 yuken solenoid valve

1/8 solenoid operated directional Yuken DSG-01 hydraulic valves, the power is 6 W,about 1/5 of Yuken DSG-01 series (29 W),and can reduce a lot of running costs.Maximum operating pressure is 32 MPa and maximum flow is 63 L/min, identical to Yuken DSG-01 series yuken type hydraulic valves,the valves can provide high pressure and high flow with low pressure drop,features can be materialized by taking use of powerful wet solenoid and rational flow channel.

Max.Operating Pressure: approx.10% increased 31.5^35 MPa.
Max. T-Line Back Pressure: approx. 30% increased 16^21 MPa.
Max.Flow Rate:approx.60% increased 63.4~100L/min.
Low Pressure Drop: Pressure drop of these valves can be reduced by 10 % from 1.0 to 0.9 MPa (145 to 131 PSI), by comparing to existing lines*; the valves can effectively reduce energy consumption .

{* At Flow Rate: 60 L/min (15.9 U.S.GPM), Spool Type: 3C2)

With characteristics compact and light weight, even with high pressure, high flow and low pressure drop, these valve bodies with DC double solenoids are compact and weight is light; overall length and weight can be reduced from 210 to 205 mm (8.26 to 8.07 inch) and from 2.2 to 1.94 kg,respectively.

In addition to the standard valves,shockless type are available in high pressure and high flow, and can eliminating noise and vibration in piping when spool changeover is available.

Due to the powerful magnetic and spring force of the solenoids,shockless type can operate stable,and these valves are antipollution,especially in stable operation.

IP65-is equivalent to high dust-proof and water-proof.
With characteristics of dust-proof and water-proof.
Products can be used on various situation and had passed CE standard.
In addition highly reputable solenoid operated directional yuken standard hydraulic valve series,we had put production of “energy-saving solenoid operated directional Yuken valve DSG-01” with high pressure and flow,which can reduce holding power.

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Hydraulic grapple is one of the common types of grapples, which is widely used in the fields of loading and unloading stone, waste steel and log. Hydraulic grapple use the excavator hydraulic pump as the power source, divided into the transmission power and power two parts, one is to rotation, the other is to grab or loose. The rotation of the grapple is accomplished by a durable, large torque motor. The oil cylinder of the grapple is divided into single cylinder and double cylinder, through the expansion of the oil cylinder to grab and release, different types of oil cylinder with different performance of grab.

Hydraulic grapple is often divided into rotary and non rotary:
1.The grapple without hydraulic rotation is connected with the oil channel of the excavator bucket cylinder, do not need to install the hydraulic pipeline and electric hydraulic control valve, quick installation, easy to use.
2.The grapple with the rotation needs to add a set of electric hydraulic control valve and pipeline to control; Hydraulic grapple with hydraulic cylinders are equipped with protective devices.

BSTIND DG4V-3-60 vickers directional valve

Flows is 80 l/min (21 USgpm), 6* Design
P, A & B Pressures is 350 bar (5000 psi), T Pressures is 210 bar (3000 psi)

Functions of DG4V3 vickers hydraulic valves are as following:
With spring return= without any sign
Without spring return =O
Without spring return with detent =OF
High-performance wet-pin solenoid with detachable coil

Coil rating
Full power coils
A – 110V AC 50Hz
Bo – 110V AC 50Hz/120V AC 60 Hz
C – 220V AC 50 Hz
Do – 220V AC 50 Hz/240V AC 60 Hz
G – 12V DC
H – 24V DC
Low power coils,
(Not available with “N” – No-spring detented models)
BL – 110V 50 Hz/120V 60 Hz
DL – 220V AC 50 Hz/240V AC 60 Hz
GL – 12V DC
HL – 24V DC

Hydraulic transmission is to use liquid as working medium to transmit energy and control the transmission mode. The hydraulic transmission technology has the advantages of large power to weight ratio, small volume, high frequency response, high pressure and good flow control, flexible transmission of power, easy to achieve linear motion, stepless speed regulation, etc..

The complete hydraulic system is composed of five parts: power unit, actuator, control and adjustment device, auxiliary equipment and working medium. Hydraulic components are composed of hydraulic pumps, hydraulic cylinders, hydraulic motors, hydraulic directional valves, supercharger and other hydraulic system components.

In the hydraulic system, hydraulic pumps and motors, hydraulic system valves and cylinders are the most valuable parts, accounting for 72% of the total value of the hydraulic system.

Because of the advantages of hydraulic transmission technology, it is widely used in downstream. All application areas such as engineering machinery, agricultural machinery, machine tools, machinery, metallurgy, mining machinery, forging port equipment, airport equipment, ships, oil and gas production, industrial robots, automated production line etc..

BSTIND 4WE10 rexroth hydraulic solenoid valve

Standard flow of 4WE10 bosch rexroth hydraulic Valves is 120l/m,and working pressure of hydraulic direction valve is 32Mpa,the same as NG5 valve and Cetop5 valve.4we10 rexroth type directional valve usually used on hydraulic power,hydraulic work system and industrial hydraulic equipment.

4/3, 4/2 directional valve with wet-pin DC or AC voltage solenoids
Size 4WE10 has Hydraulic Solenoid Valve
Component series has 3X (30~39),4X (40~49)
The maximum operating pressure is 315 bar
The maximum flow is 120 l/min

Lear more details

According to the function of hydraulic valves can be divided into three categories, the flow control valve (including throttle valve, control valve, diversion valve), hydraulics directional control valve (including one-way valve and valve), pressure control valve (including overflow valve, relief valve, sequence valve, relief valve, pressure relay).

According to the operation mode, the hydraulic valve can be divided into manual, pedal, motor, electric, spring control, hydraulic, electro-hydraulic, hydraulic pilot control, etc..

Hydraulic valve installation
The installation of hydraulic valves are mainly divided into 5 types, which is, pipe type, plate type, plate type, stack type, cartridge type, flange type. The inlet and outlet ports of the pipe valves are provided with internal threads, which are connected with pipelines and other components through a connected pipe joint. Chip valve also known as multiway valve, is developed from the pipe type manual reversing valve: a control panel with a spool valve to control a set of actuators – hydraulic cylinder or hydraulic motor. The oil port connecting plate valve is not directly on the valve, but on the baseplate, the valve is fixed on the baseplate by bolts. The stack valve is the extension, expansion and integration of the plate valve. The cartridge valve can be seen as a valve that does not wear a coat because they do not have a housing and must be installed in a valve block or manifold.

BSTIND is a professional manufacturer of solenoid directional valve,high quality and Chinese factory price for B2B customers.Quick delivery,bulk purchasing,reply in 24H.

DG4V5 Vickers hydraulic solenoid valve

Max. pressure 315 bar (4500 psi)
Max. flow rates Up to 120 L/min(32 USgpm),
dependent on spool
Mounting surface ISO 4401 size 05
NFPA D02
DIN 24340 (NG10)

Four-port solenoid operated directional control Vickers DG4V5 valves with four-land spool design,so as to to facilitate of smooth, and response to variable speeds.

The range including:

AC and DC wet-armature solenoid options with ISO 4400 (DIN 43650) electrical connections and manual overrides.
Variable speed changeover potential in all DC models;

More spool types:with spring-offset, spring-centered and detented arrangements.

DG4V5 vickers hydraulic solenoid valve is compatible to fluid :

AC or DC-voltage models is suitable for petroleum oils, water-in-oil (invert) emulsions or phosphate esters. AC-voltage models can be used on water glycols.

According to the German local time July 2nd reported: Rexroth LC2A-1X series valve has ISO7368 certification, users can directly mount any LFA logic coverage in Rexroth standard procedures to create hydraulic functions required. This method increases the flexibility for future modifications, since only logical coverage needs to be replaced to meet the new requirements.

Rexroth is committed to providing safe, accurate, efficient and cost-effective transmission and control technologies for all types of machinery and systems. The company integrates the global application experience, research and develop innovative products, provides solutions and services for customers of mechanical applications and engineering, factory automation and renewable energy in each market segment. Rexroth also provides customers with a variety of hydraulic, electronic transmission and control, pneumatic, gear, linear transmission and assembly technology. The company operates in more than and 80 countries, with more than 37,500 professional employees, global sales of nearly 6 billion 500 million euros in 2012.

BSTIND can produce most types of REXROTH hydraulic valves, especially 4WE6 and 4WE10 series hydraulic solenoid valves

4WE6 hydraulic solenoid valves

4WE10 hydraulic solenoid valves

Hydraulic components can be divided into power components and control components and executive component. Although they are all hydraulic components, their own function and installation of the technical requirements are not the same.

Power components: refers to a variety of hydraulic pumps, gear pumps, vane pumps, piston pumps, screw pumps.
1.Gear pump and series pump (including external and internal meshing) structural types.
2.Vane pump (including single stage pump, variable pump, double stage pump, double pump).
3.The plunger pump is divided into axial piston pump and radial piston pump, axial piston pump is divided into variable pump, quantitative pump (variable pump is divided into manual and variable pressure compensating variable, servo variable etc.) . From the structure is divided into the end face type and oil distribution valve type oil distribution mode, and the radial plunger pump with oil type, basically for valve type oil distribution.

Executive component: hydraulic cylinder and hydraulic motor, hydraulic cylinder hydraulic cylinder piston, piston hydraulic cylinder, hydraulic cylinder, hydraulic cylinder combination swing hydraulic motor; gear hydraulic motor is divided into hydraulic vane motor, piston hydraulic motor.

Control components: reversing valve, modular check valve, hydraulics directional control valve.
Pressure control valve: relief valve, pressure relief valve, sequence valve, hydraulic pressure valve, etc.
Flow control valve: throttle valve, speed control valve, shunt valve.

Auxiliary components: in addition to the above three parts components, including pressure gauge, oil filter, accumulator, cooler, fittings {mainly include: various pipe fittings (flared, welding type, sleeve type, SAE flange), high pressure ball valves, quick couplings, hose assembly, pressure measuring joint and the pipe clip} and tank, they are also very important.

4WE3-61 hydraulic solenoid miniature hydraulic valve

Max working oil pressure P.A.B : 31.5 MPa
Max oil pressure for T chamber : 10 MPa
Rated flow : 10 l/min
Max flow : 15 l/min

NG3 valve with 3 holes
4/2-way impulse valve
4/3-way with centered mid position spring
4/2-way with spring reset.
Q max.=15l/min,P max.=315Bar

1.Heating

Because the medium (hydraulic oil) exist different velocity in different parts of the flow process, leading to the existence of the internal friction, there is also a friction between the liquid and the inner wall of the pipeline at the same time, these are the causes of the hydraulic oil temperature rise. The increase of temperature will lead to the increase of internal and external leakage and reduce the mechanical efficiency. At the same time, due to the high temperature, hydraulic oil will expand, resulting in compressibility increase, so that the control action can not be transfered very good.
Solution: heating is an inherent feature of the hydraulic system, can not be eradicated as far as possible to alleviate. The use of good quality hydraulic oil, hydraulic piping layout should try to avoid the elbow, the use of high quality pipes and pipe joints, hydraulic flow valves, etc..

2.Vibration

The vibration of the hydraulic system is one of the chronic illness. Because of the high speed flow of the hydraulic oil in the pipeline and the impact of the hydraulic pressure control valve opening and closing process is the cause of the vibration of the system. Strong vibration will cause the error of the control action of the system, will also cause error of some the more precise instrument of the system, resulting in system failure.
Solution: the hydraulic pipe should be fixed to avoid sharp bends. Avoid change the direction of fluid flow frequently, the vibration mitigation measures should be done when can not be avoided. The entire hydraulic system should have good damping measures, while avoiding the external forces on the system.

3.Leakage

The leakage of hydraulic system is divided into internal leakage and external leakage. Internal leakage refers to the leakage process occurs in the system, such as the leakage of hydraulic cylinder piston on both sides, the leakage between control valve spool and hydraulic directional spool valve. Although the internal leakage will not cause the loss of hydraulic oil, but due to the leakage, the established control action may be affected until the system failure. External leakage is the leakage between the system and the external environment. Hydraulic oil leaking into the environment directly, in addition will affect the working environment of the system, but also lead to system failure caused by insufficient pressure. Leakage of oil into the environment will also gain the risk of fire.
Solution: the use of good quality seals, improve equipment processing accuracy.

BSTIND Z2FS modular throttle check valve

MAX 315 bar, MAX 160 L/min, MAX 35MPa

Sandwich plate valve
Porting pattern to ISO 4401-05-04-0-05, NFPA T3.5.1 R2 and ANSI B93-7 D05
For limiting the main or pilot oil flow of 2 actuator ports
3 adjustment elements:
-Lockable rotary knob with scale
-Spindle with hexagon socket and scale
-Rotary knob with scale
For meter-in and meter-out throttling