Causes of leakage of low temperature solenoid operated hydraulic control valve

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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The reason of hydraulic solenoid valve seal is not tight

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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Tile machine function

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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The connection of hydraulic valve

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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Working principle of hydraulic grapple

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

Analysis of downstream application of hydraulic system

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

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What are the installation of hydraulic valve

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.