Supply AVEENTICS pneumatic valve supplier

AVENTICS pneumatic valve from Germany

Pneumatic valves are responsible for controlling the pressure, velocity, and quantity of air as they move through an array of pneumatic system components. Pneumatic systems, which rely on compressed air to transmit power, can be found in countless industrial applications, from diesel engines in pneumatic electric tools. Based on the given application and the pneumatic system used, several types of pneumatic valves, including other components of this type, can be found in the heart of the device. Functional directional control valves, which control the direction of air flow or inhibit flow together, are a large class of pneumatic valves with multiple variants.

Functional directional control valve

Multi functional directional pneumatic control valves are classified based on the number of inlet and outlet ports they have, the number of flow paths they create, and the mechanism through which they are opened and closed.

Two way directional valve

The two-way directional valve allows air to flow in two directions, and it can open or close two ports. If the valve hole is closed, no air can flow through the valve. If the port is open, air can pass through the valve, through the second port, or move in the opposite direction from the port.

three-way directional valve

The three-way directional valve has three ports, each used for different purposes. Port, used to connect a valve to an actuator or other device. The second port is connected to an air flow. The third port is used as an exhaust port. When the second port is open and the third port is closed, air moves to the device through the valve. When the third port is open and the second port is closed, the actuator can release air. Three way valves are usually connected to actuator cylinders or used in pairs, connected to double acting cylinders.

four-way reversing valve

The four-way directional valve has four different ports, two of which are connected to the actuator, one is connected to the pressurized air flow, and one serves as the exhaust passage. The valve in the pneumatic system between them is of type, as four different paths enable the valve to effectively twist the motion of the motor or basic cylinder. An additional port is sometimes added to a four-way valve, making it a five port four-way valve. A four-way valve and an additional port are typically used to provide dual pressure, which means the valve can use either one of the two pressures or a backup depending on which application requires it. Alternatively, the valve can use other ports as auxiliary exhaust ports.

Spring bias

The classification of this type of pneumatic valve refers to the way in which the direction of air flow is switched. For example, in a bidirectional directional valve, the valve can be open (air flow enabled) or closed (preventing air flow). In order to ensure that the spool valve of the actuator is in place when each port is assumed to be in the open or closed position. Release the slide valve and pneumatic valve back to their previous positions, and release the spring onto the spool. Bidirectional directional valves, also known as spring-loaded valves, function in this way.

Resting state: Open complaint closed

Bidirectional directional spring biased valves have two positions, and they can assume that when the connector is in a non active state: open or closed. In the device, the open static position is the standard, and air moves freely through the valve. In a closed stationary state, air flow is blocked. In a three-way valve, one port is always open. In this case, a closed stationary state usually results in blocking the air flow port, so the pressure will not move unless the device is turned on.

5792600220

5796600220

5790069810

5790800220

5795900620

5796500620

5790600220

5790069390

5794400620

5790069750

5791280220

5792280220

5794100220

5790069400

5791605220

5792800620

0820212200

0820224014

0820055501

0820260002

0820038152

0820024977

0820055101

0820024994

0820037302

0820055601

0820410100

0820400001

0820401002

0820023026

0820022026

0820402001

0820060771

0820060761

0820056101

0820018991

0820062051

0820023025

0820035025+AC220V plug with light

0820215104

0820024041

0820059301

0820056301

0820022010

0820024029

0820224003

0820024601

0820027002

0820024525

0820060027

0820055102

0820404021

0820061251

0820022992

R412006194

R412010718

R412007240

R412009210

R412006109

Replace 0821100103 with R412010850

R412015208 with coil

R412012576

082110103 discontinued R412010850 Spring Generation

The corresponding repair kit for R412014333 is R413000831

R412014333

5200110890 discontinued and replaced with R412014962

082120195 discontinued and replaced with R412010570

R412010310

R412019025

R412007209

R412019000

5217500020 discontinued function replaced by R412021170

R412004434

R412009922

R412022876

0821100015 discontinued and replaced with R412010631

5200110890 discontinued and upgraded to Spring R412014962

R412006370

R412006222

R412009690

R412000127

R412015808

5351323200 discontinued function replaced by R412007219

5351330200 discontinued R412009221 function to replace the connecting piece R412009371 in the middle of the upper and lower parts

5352630100 discontinued R412009261 function replacement

0830100434 discontinued R412022873 replacement

8901700190 replaced by R412004951

R412006210

R412007915

R412007354

R412010857

R414003637

R414013396

R414012656

R414001166

R414002925

R414002927

R414002923

R414002921

R414002403

R414013404

R414001373

5610214530 discontinued and replaced by R414000708

R414002005

R414008453

5610111110 discontinued with only functional replacement R414008453

R414005670

R414013489

R414007421

Is R414113365 R414003365

R414001234

R414000126

R414006780

R414013173

R414001184

R414012114

R414012118

R414002352

5610120620 discontinued function Spring generation R414002005

R414001168

5610141530

5610219100

5610214510 discontinued and replaced by 5610264510

5610214530 discontinued and replaced by R414000708

5610111110 discontinued with only functional replacement R414008453

5610149040

5610141330

5610141530

5610102050

0820056101

0820056101

0820056101

5610224520

5610214530

5610214400

5610214510

5610120620 discontinuation function replaces R414002005

5610219800

5811172650

R480689581

5813170650

5814170650

5812300000

5811590650

0820029960 discontinued 5813492540

5813221400

5811280080

5812180080

R431006581

5812110100

5814030000

5811170650

5813590650

R480075819 discontinued and replaced by R480631856 Spring Generation

5811150100

5814280000

5813490650

5814291650

5811461160

R480215813

0820029002 stopped production and was replaced by 5813490650 Spring Generation

Upgrade 0820226001 to 5813630000

5812400000

5811111100

5811280000

5814420400

5764125280 Stop 581110400 Replace

5811591650

Valve leakage

There are generally several types of leakage in regulating valves, including internal leakage, packing leakage, and leakage caused by deformation of valve cores and seats. The following are added separately

To analyze.

1. Valve leakage

The length of the valve stem is not suitable, the valve stem of the pneumatic valve is too long, and the upward (or downward) distance of the valve stem is not enough, resulting in a gap between the valve core and the valve seat

Gap, unable to fully contact, resulting in insufficient tightness and internal leakage. Similarly, if the valve stem of a gas shut-off valve is too short, it can also cause a gap between the valve core and the valve seat

Being able to have full contact can lead to inadequate sealing and internal leakage. Solution: The valve stem of the regulating valve should be shortened (or extended) to make the length of the regulating valve appropriate

No more internal leakage.

2. Packing leakage

After the packing is loaded into the packing box, axial pressure is applied to it through the gland. Due to the plastic deformation of the filler, it generates radial force, and

Close contact with the valve stem, but this contact is not very uniform. Some parts have loose contact, some parts have tight contact, and even some

The area has not been in contact at all. During the use of the regulating valve, there is relative motion between the valve stem and the packing, which is called axial motion

Move. During use, with the influence of high temperature, high pressure, and highly permeable fluid media, the packing box of the regulating valve also experiences leakage

Parts with more elephants. The main cause of packing leakage is interface leakage, and for textile packing, leakage may also occur (pressure medium flows along the packing)

The tiny gaps between the fibers leak outward. The interface leakage between the valve stem and the packing is due to the gradual attenuation of the packing contact pressure

Due to self aging and other reasons, the pressure medium will leak outward along the contact gap between the packing and the valve stem.

For the convenience of packing, chamfer the top of the packing box and place a metal protection with a small gap that is resistant to erosion at the bottom of the packing box

Ring, please note that the contact surface between the protective ring and the packing cannot be inclined to prevent the packing from being pushed out by the pressure of the medium. Packing box and packing contact part

The surface should be finely processed to improve surface smoothness and reduce filler wear. Flexible graphite is selected as the filler due to its good air tightness

Low friction, minimal long-term use, minimal wear and tear, easy maintenance, and no change in friction after re tightening the cover bolts

Good chemical resistance, pressure resistance, and heat resistance, not corroded by internal materials, and the metal in contact with the valve stem and packing box does not undergo pitting or corrosion

Erosion. In this way, the sealing of the valve stem packing box is effectively protected, ensuring the reliability of the packing seal and greatly improving its service life

High.

3. Deformation and leakage of valve core and seat

The main reason for leakage of valve cores and seats is due to casting or forging defects in the production process of regulating valves, which can lead to increased corrosion. But

The passage of corrosive media and the flushing of fluid media can also cause leakage of regulating valves. Corrosion mainly exists in the form of erosion or cavitation. when

When corrosive media pass through the regulating valve, they will corrode and impact the valve core and seat materials, causing the valve core and seat to become elliptical or

Other shapes, over time, may cause a mismatch between the valve core and seat, resulting in gaps and inadequate sealing, leading to leakage.

Control the material selection of valve core and valve seat. Choose corrosion-resistant materials and resolutely reject products with defects such as pitting and sand holes

Except. If the deformation of the valve core and seat is not too severe, it can be ground with fine sandpaper to eliminate traces, improve the sealing smoothness, and enhance the sealing performance

Can. If the damage is severe, the valve should be replaced with a new one.

Oscillation

The spring stiffness of the regulating valve is insufficient, and the unstable and rapidly changing output signal of the regulating valve can easily cause oscillation of the regulating valve. And there are also selected valves

The frequency is the same as the system frequency or the pipeline or base vibrates violently, causing the regulating valve to vibrate accordingly. Improper selection, the regulating valve operates at a small opening

There are significant changes in flow resistance, velocity, and pressure, and when the stiffness of the valve is exceeded, stability deteriorates, and in severe cases, oscillation occurs.

Due to the multifaceted causes of oscillation, specific problems need to be analyzed on a case by case basis. For minor vibrations, stiffness can be increased to eliminate them,

If using a regulating valve with a high stiffness spring and switching to a piston actuator structure, etc; Severe vibration of pipelines and bases can be eliminated by increasing support

Interference: When the frequency of the valve is the same as that of the system, replacing the regulating valve with a different structure. If the oscillation is caused by working at a small opening, it is due to improper selection

When it is caused, specifically due to the excessive flow capacity C value of the valve, it is necessary to reselect and choose a valve with a smaller flow capacity C value or adopt a separate method

Control or use a mother and child valve to overcome the oscillation caused by the regulating valve working at a small opening.

Valve locator malfunction

The ordinary locator works on the principle of mechanical force balance, namely nozzle baffle technology, and mainly has the following types of faults:

(1) Due to the use of mechanical force balance principle, there are many movable parts, which are easily affected by temperature and vibration, causing waves in the regulating valve

Move;

(2) Using nozzle baffle technology, due to the small nozzle hole, it is easy to be blocked by dust or unclean air sources, which makes the locator unable to work properly

Make;

(3) Using the principle of force balance, the elastic coefficient of the spring will change in harsh environments, causing nonlinearity in the regulating valve and resulting in poor control quality

The quantity has decreased.

(4) The intelligent locator is composed of components such as a microprocessor (CPU), AD, DIA converter, etc. Its working principle is completely different from that of a regular locator

Different, the comparison between the given value and the actual value is purely an electric signal, no longer a force balance. Therefore, it can overcome the force balance of conventional locators

Disadvantages. But when used in emergency parking situations, such as emergency shut-off valves, emergency vent valves, etc., these valves are required to be stationary in a certain position,

Reliable action is only necessary in emergency situations. Staying in a certain position for a long time can easily cause the electrical converter to lose control and result in minor issues

Dangerous situations where the signal does not move. Besides The position sensing potentiometer used for valves is prone to changes in resistance value due to its operation on site

A dangerous situation where the small signal does not move and the large signal is fully activated. Therefore, in order to ensure the reliability and usability of intelligent locators, it is necessary to

Test them frequently.