ATOS proportional valve DPZO-A-251-D5 in stock
$366.13
When the input signal to the Italian ATOS proportional valve increases, the pilot valve 1 of the supply solenoid valve 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, causing the pilot chamber pressure to rise. This pressure acts on the diaphragm 2, opening the supply valve core 4 connected to the 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 is performed with the target value until the output pressure is proportional to the input signal, thus obtaining a proportional relationship between the output pressure and the change in the input signal.
Brand
ATOS/Italian Atos
ATOS Proportional Valve DPZO-A-251-D5 in Stock
ATOS 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. 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 increases the number of components, raising costs and complicating the system, but also requires many components to be manually adjusted in advance. Electro-proportional valve control is a 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 main differences between ATOS proportional valves and servo valves are as follows:
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 in the neutral 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 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 Neutral 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.
Proportional servo valves have performance between servo valves and proportional valves.
Proportional directional valves are a type of proportional valve used to control flow rate and direction.
ATOS Proportional Valve Structure and Principle
When the input signal of an Italian ATOS proportional valve increases, the supply solenoid pilot valve 1 switches, while the exhaust solenoid pilot valve 7 is in the reset state. The supply pressure 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, 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 is performed with the target value until the output pressure is proportional to the input signal, thus demonstrating that the output pressure changes proportionally to the change in the input signal. Because it lacks a nozzle-baffle mechanism, the valve is insensitive to impurities and boasts high reliability.
The Italian ATOS proportional valve features:
1) Stepless adjustment of pressure and speed, avoiding the shock phenomenon that occurs when switching on normally open on/off pneumatic valves.
2) Remote and programmable control capabilities.
3) Simplified system with significantly fewer components compared to intermittent control.
4) Smaller size, lighter weight, simpler structure, and lower cost compared to hydraulic proportional valves, but with a much slower response time and greater sensitivity to load changes.
5) Low power consumption, low heat generation, and low noise.
6) No fire hazard and no environmental pollution. Minimal impact from temperature changes.
The Italian ATOS proportional valve is a type of proportional valve used to control flow rate and direction.
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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 frequencies 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.
