ATOS proportional valve DKZOR-A-171-D5 40 in stock

Brand

ATOS/Italian Atos

ATOS Piston Pumps, ATOS Gear Pumps, ATOS Axial Piston Pumps, ATOS Vane Pumps, ATOS Hydraulic Cylinders, ATOS Relief Valves

Overview of ATOS Proportional Valves:

Flow control can be divided into two types:

One is on/off control: either fully open or fully closed, the flow is either at its maximum or minimum, with no intermediate state, such as ordinary solenoid direct-flow valves, solenoid directional valves, and electro-hydraulic directional valves.

The other is continuous control: the valve port can open to any degree as needed, thereby controlling the flow rate. These valves can be manually controlled, such as throttle valves, or electrically controlled, such as proportional valves and servo valves.

Therefore, the purpose of using proportional valves or servo valves is to achieve throttling control of flow rate through electrical control (of course, pressure control can also be achieved through structural modifications). Since it is throttling control, there will inevitably be energy loss. Servo valves differ from other valves in that their energy loss is greater because they require a certain flow rate to maintain the operation of the pre-stage control circuit.

Product Advantages and Disadvantages (Edit this section)

The main valve of a servo valve generally has a spool valve structure, similar to a directional valve. However, the valve core's switching is not driven by an electromagnet, but by the hydraulic pressure output from the pre-stage valve. This is similar to an electro-hydraulic directional valve, except that the pre-stage valve of an electro-hydraulic directional valve is an electromagnetic valve, while the pre-stage valve of a servo valve is a nozzle-flange valve or jet valve with better dynamic characteristics.

In other words, the main valve of a servo valve is controlled by the output pressure of the pre-stage valve, and the pressure of the pre-stage valve comes from the inlet p of the servo valve. If the pressure at port p is insufficient, the pre-stage valve cannot output enough pressure to actuate the main valve core.

We know that when the load is zero, if the four-way spool valve is open, the pressure at port p = the pressure at port t + the pressure loss at the valve port (ignoring other pressure losses in the oil circuit). If the pressure loss at the valve port is very small, and the pressure at port t is zero, then the pressure at port p is insufficient to supply the pre-stage valve to actuate the main valve core, and the entire servo valve fails. Therefore, servo valves have relatively small orifices, requiring a certain pressure loss even when fully open to maintain the normal operation of the pre-stage valve.

Servo valves actually have many disadvantages: high energy consumption, prone to failure, poor contamination resistance, high price, etc. Their only advantage is their highest dynamic performance among all hydraulic valves. This single advantage makes them indispensable in many applications with high dynamic performance requirements, such as aircraft and rocket steering, and turbine speed control. For applications with lower dynamic requirements, proportional valves are generally preferred.

ATOS proportional valves offer performance between servo valves and proportional valves.

ATOS proportional directional valves are a type of proportional valve used to control flow rate and direction.

Further Information---Automatic control of electro-proportional valves can be divided into intermittent control and continuous control. Intermittent control is on/off control. Pneumatic control systems use on/off directional valves with low operating frequencies to control the airflow. Pressure reducing valves regulate the required pressure, and throttle valves regulate the required flow rate. Traditional pneumatic control systems require multiple pressure reducing valves, throttle valves, and directional valves to achieve multiple output forces and speeds. This not only increases the number of components, raising costs and complicating the system, but also necessitates manual adjustment of many components beforehand. Electro-proportional valve control is a continuous control method, characterized by output varying with input, exhibiting a proportional relationship between the two. Proportional control can be open-loop or closed-loop.

ATOS Proportional Valve Structure and Principle

When the input signal to the ATOS proportional valve increases, the supply solenoid pilot valve 1 reverses, while the exhaust solenoid pilot valve 7 remains in the reset state. The supply pressure then enters the pilot chamber 5 from the SUP port through valve 1. The pilot chamber pressure rises, acting on the diaphragm 2, opening the supply valve core 4 connected to diaphragm 2 and closing the exhaust valve core 3, generating output pressure. This output pressure is fed back to the control loop 8 via pressure sensor 6. Here, a rapid comparison and correction with the target value is performed until the output pressure is proportional to the input signal, thus demonstrating that the output pressure changes proportionally to the input signal. Because it lacks a nozzle-baffle mechanism, the valve is insensitive to impurities and boasts high reliability.

ATOS Proportional Valve Features

1) Enables stepless adjustment of pressure and speed, avoiding the shock phenomenon that occurs when switching normally open on/off air valves.

2) Enables remote and program control.

3) Compared to intermittent control, the system is simplified, with a significant reduction in components.

4) Compared to hydraulic proportional valves, it is smaller, lighter, simpler in structure, and lower in cost, but its response speed is much slower than hydraulic systems, and it is more sensitive to load changes.

5) Low power consumption, low heat generation, and low noise.

6) Safe of fire and environmentally friendly. Less affected by temperature changes.

ATOS proportional valve stock list:

DHZO-T-071-L5

DHZO-T-071-S5

DHZO-TE-051-L5/Y 40

DHZO-TE-071-L5

DHZO-TE-071-S5 40/PE

DHZO-TE-073-S5

DKZA-A-173-L5/PA-M/7

DKZO-A-151-S5

DKZO-A-171-L5

DKZO-A-173-S5

DKZOR-A-151-S5

DKZOR-A-151-S5/18 40

DKZOR-A-151-S5/B

DKZOR-A-153-L5/B

DKZOR-A-171-D5 40

DKZOR-A-171-L5

DKZOR-A-171-S5

DKZOR-A-171-S5/18

DKZOR-A-173-D5

DKZOR-A-173-L5

DKZOR-A-173-L5/18 40

DKZOR-A-173-L5/Y

DKZOR-A-173-S3

DKZOR-A-173-S5

DKZOR-A-173-S5/18

DKZOR-AE-171-L5 10

DKZOR-AE-171-S5

DKZOR-AE-171-S5 10/WG

DKZOR-AE-171-S5/Y 10

DKZOR-AE-173-D5 10 DKZOR-AE-173-L5 10

DKZORC-A-151-S5/18

DKZOR-T-151-L5

DKZOR-T-151-L5/Y

DKZOR-T-153-L5

DKZOR-T-171-D5

DKZOR-T-171-L5

DKZOR-T-171-S5

DKZOR-T-171-S5/Y

DKZOR-T-173-L5 40

DKZOR-TE-170-L5 40

DKZOR-TE-171-L5

DKZOR-TE-171-L5/I 40

DKZOR-TE-171-S5

DKZOR-TE-171-S5/Y DKZOR-TE-173-L5 40

Proportional Directional Valve DPZO-A-271-L5/DEG

Proportional Directional Valve DPZO-A-271-L5/DEG

Proportional Directional Valve DPZO-A-273-D5/D/G

Proportional Directional Valve DPZO-A-273-D5/E30

Proportional Directional Valve DPZO-A-273-S5

Proportional Directional Valve DPZO-A-371-L5/DG

Proportional Directional Valve DPZO-A-373-D5/E30

Proportional Directional Valve DPZO-AE-171-S5/E

Proportional Directional Valve DPZO-AE-171-S5/E

Proportional Directional Valve DPZO-AE-171-S5/G

Proportional Directional Valve DPZO-AE-171-S5/G +SP-ZH-7P

Proportional Directional Valve DPZO-AE-171-L5/E

Proportional Directional Valve DPZO-AE-173-S5

Proportional Directional Valve DPZO-AE-271-L5

Proportional Directional Valve DPZO-AE-271-L5

Proportional Directional Valve DPZO-AE-271-L5

Proportional Directional Valve DPZO-AE-273-L5

Proportional Directional Valve DPZO-AE-273-L5

Proportional Directional Valve DPZO-AE-373-S5

The company mainly deals in European and American brands. We can source brands from any European country, including leading German brands such as: BURKERT, DEMAG, HAWE, REXROTH, HYDAC, PILZ relays, FESTO, IFM sensors, E+H, HEIDENHAIN, P+F sensors, SICK, TURCK, and HIRSCHMANN industrial switches. German brands: Hengstler, Murr, Schmersal, Samson, EPRO (Emerson Group)

American brands: MOOG, ASCO, MAC, NUMATICS, PARKER, VICKERS, ROSS

British brands: Norgren

Italian brands: OMAL, ATOS, CAMOZZI, UNIVER, Camozzi