ATOS proportional directional valve DHZO-AE-073-S5/I10 in stock

Brand

ATOS/Italian Atos

The Italian Atos proportional directional valve is a type of proportional valve used to control flow rate and direction.

Extended 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 (ON-OFF) directional valves with low operating frequency to control the opening and closing of the air path. Pressure reducing valves regulate the required pressure, and throttle valves regulate the required flow rate. This traditional pneumatic control system requires multiple pressure reducing valves, throttle valves, and directional valves to achieve multiple output forces and multiple movement speeds. This not only requires more components, increases cost, and complicates the system, but also requires many components to be manually adjusted in advance. Electro-proportional valve control is a type of continuous control, characterized by the output changing with the input, and a certain proportional relationship exists between the output and input. Proportional control is divided into open-loop control and closed-loop control.

The structural principle of the Italian ATOS proportional directional valve:

When the input signal of the ATOS proportional directional valve increases, the pilot valve 1 of the supply solenoid valve switches, while the exhaust solenoid pilot valve 7 is 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, and the air pressure acts on the diaphragm 2, causing the supply valve core 4 connected to diaphragm 2 to open, and the exhaust valve core 3 to close, generating output pressure. This output pressure is fed back to the control circuit 8 through the pressure sensor 6. Here, a rapid comparison and correction is performed with the target value until the output pressure is proportional to the input signal, thus obtaining a proportional change in output pressure with the input signal. Because there is no nozzle-baffle mechanism, the valve is insensitive to impurities and has high reliability.

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Differences between Italian ATOS proportional valves and servo valves:

There is no strict definition of the difference between servo valves and proportional valves. As the performance of proportional valves has improved, they are gradually approaching that of servo valves, so proportional servo valves have emerged in recent years.

Differences between Italian ATOS proportional valves and servo valves:

Mainly reflected in the following points:

1. Different drive devices. 1. **Differences in Driving Mechanisms:** Proportional valves are driven by proportional electromagnets; servo valves are driven by force motors or torque motors.

2. **Differences in Performance Parameters:** Hysteresis, dead zone, bandwidth, and filtration accuracy differ, leading to different applications. Servo valves and servo-proportional valves are primarily used in closed-loop control systems, while other types of proportional valves are mainly used in open-loop control systems and closed-loop speed control systems.

2.1 Servo valves have no dead zone at mid-position, while proportional valves do.

2.2 Servo valves have a higher frequency response, reaching up to approximately 200Hz, while proportional valves typically have a maximum frequency of tens of Hz.

2.3 Servo valves have higher requirements for hydraulic fluid, requiring fine filtration to prevent clogging, while proportional valves have lower requirements.

3. **Differences in Valve Core Structure and Machining Precision:** Proportional valves use a valve core + valve body structure, with the valve body also serving as the valve sleeve. Servo valves and servo-proportional valves use a valve core + valve sleeve structure.

4. **Differences in Mid-Position Functions:** Proportional directional valves have a neutral position function similar to ordinary directional valves, while servo valves only have an O-type neutral position function (E-type for Rexroth products).

5. The rated pressure drop of the valves differs.

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Our company mainly deals in European and American brands and can source brands from any European country. For example, our advantageous 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