ATOS proportional valve DHZO-AT-073-P3 20 in stock

Brand

ATOS/Italian Atos

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ATOS proportional valves control flow in two ways: One is on/off control: either fully open or fully closed, with flow either at its maximum or minimum, without intermediate states. Examples include ordinary solenoid direct-flow valves, solenoid directional valves, and electro-hydraulic directional valves. The other is continuous control: the valve can open to any degree as needed, thereby controlling the flow rate. These valves include manually controlled ones, such as throttle valves, and electrically controlled ones, 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 electronically (of course, pressure control can also be achieved through structural modifications). Since it's throttling control, there is inevitably 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.

ATOS proportional valves can control flow rate in two ways:

One is on/off control: either fully open or fully closed, the flow rate 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 be opened to any degree as needed, thereby controlling the flow rate. These valves can be manually controlled, such as throttle valves, or electronically controlled, such as proportional valves and servo valves.

Therefore, the purpose of using proportional valves or servo valves is to achieve flow throttling control electronically (of course, pressure control can also be achieved through structural modifications). Since it's 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

Spool Valve Structure: The main valve of a servo valve is generally 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 directional valve, while the pre-stage valve of a servo valve is a nozzle-flapper 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 p is insufficient, the pre-stage valve cannot output enough pressure to drive 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 = pressure at port t + 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 pilot valve to actuate the main valve spool, and the entire servo valve will fail. Therefore, the valve port of a servo valve is made relatively small, so that even when the valve port is fully open, there must be a certain pressure loss to maintain the normal operation of the pilot valve.

Servo valves actually have many disadvantages: high energy consumption, prone to failure, poor resistance to contamination, high price, etc. Their only advantage is that their dynamic performance is the highest among all hydraulic valves. Because of this single advantage, servo valves are necessary in many applications with high dynamic performance requirements, such as aircraft and rocket servo control, and turbine speed regulation. For applications with lower dynamic requirements, proportional valves are generally preferred.

ATOS proportional valves are currently on sale at a discount:

DHZO-AE-073-D5/I/10

DHZO-AE-073-S5 10

DHZO-AE-073-S5/I 10

DHZO-AT-073-P3 20

DHZO-ATE-073-P3/B/DP27SB 20

DHZO-T-051-L1

DHZO-T-051-L5 31

DHZO-T-071-D5

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

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

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

Extended Information---Automatic control of electrical proportional valves can be divided into intermittent control and continuous control. Intermittent control is also known as on/off control. Pneumatic control systems use low-frequency on-off directional valves to control the airflow. Pressure reducing valves regulate the required pressure, and throttle valves regulate the required flow rate. To achieve multiple output forces and speeds, this traditional pneumatic control system requires multiple pressure reducing valves, throttle valves, and directional valves. This not only increases the number of components, raising costs and complicating the system, but also requires 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 switches, 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. The output pressure is fed back to the control loop 8 via pressure sensor 6. Here, it is quickly compared and corrected with the target value until the output pressure is proportional to the input signal, thus demonstrating that the output pressure changes proportionally to the input signal. Because there is no nozzle-baffle mechanism, the valve is insensitive to impurities and has high reliability.

The company primarily deals with European and American brands and can source brands from any European country. For example, key German brands include: 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