ATOS proportional directional valve DHZO-ATEBQ-SN-NP-060-P3
$176.12
The Italian ATOS proportional directional valve actually has many drawbacks: high energy consumption, prone to failure, poor resistance to contamination, high price, and so on. Its only advantage is its superior dynamic performance, the highest among all hydraulic valves. This single advantage makes servo valves necessary in many applications requiring high dynamic characteristics, such as aircraft and rocket steering systems and turbine speed control. For applications with lower dynamic requirements, proportional valves are generally the preferred choice.
Brand
ATOS/Italian Atos
ATOS Piston Pumps, ATOS Gear Pumps, ATOS Axial Piston Pumps, ATOS Vane Pumps, ATOS Hydraulic Cylinders, ATOS Relief Valves, ATOS Proportional Valves
Differences between ATOS Proportional Directional Valves and Servo Valves:
The main differences between ATOS proportional directional valves are as follows:
1. Different drive devices. The drive device for proportional valves is a proportional electromagnet; the drive device for servo valves is a force motor or torque motor;
2. Different performance parameters. 2.1 Servo valves have no dead zone in the neutral position, while proportional valves do. Therefore, their applications differ. Servo valves and servo proportional valves are mainly used in closed-loop control systems, while other proportional valve structures are mainly used in open-loop control systems and closed-loop speed control systems.
2.2 Servo valves have a higher frequency response (response frequency), reaching up to around 200Hz, while proportional valves generally 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. Valve core structure and machining precision differ. 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. Neutral position functions differ. Proportional directional valves have neutral position functions similar to ordinary directional valves, while servo valves only have an O-type neutral position function (E-type for Rexroth products).
5. Rated pressure drop differs.
Proportional servo 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 (ON-OFF) directional valves with low operating frequencies to control the airflow. Pressure is adjusted by pressure reducing valves, and flow rate is adjusted by throttle valves. 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 manual adjustment of many components beforehand. Electro-proportional valve control is a type of continuous control, characterized by output varying with input, with a proportional relationship between the output and input. Proportional control is further divided into open-loop control and closed-loop control.
ATOS Proportional Directional Valve Structure and Principle
When the input signal 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. The pilot chamber pressure rises, and this 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 circuit 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 there is no nozzle-baffle mechanism, the valve is insensitive to impurities and has high reliability.
ATOS Proportional Directional Valve Features
1) Enables stepless adjustment of pressure and speed, avoiding the impact phenomenon during switching of normally open on/off valves.
2) Enables remote control and program control.
3) Compared to intermittent control, the system is simplified, and the number of components is greatly reduced. 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 that of a hydraulic system, and it is more sensitive to load changes.
5) It uses less power, generates less heat, and produces less noise.
6) It will not cause a fire and will not pollute the environment. It is less affected by temperature changes.
ATOS Proportional Directional Valve Stock List:
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
Proportional Directional Valve DPZO-AE-373-S5
Proportional Directional Valve DPZO-AES-PS-273-L5/IZ
Proportional Directional Valve DPZO-TE-173-S5/I
Proportional Directional Valve DPZO-TE-271-L5/D
Proportional Directional Valve DPZO-L-271-L3
Proportional Directional Valve DPZO-L-273-L5
Proportional Directional Valve DPZO-LE-270-S5/G
Proportional Directional Valve DPZO-LE-271-L5
Proportional Directional Valve DPZO-LE-271-L5/D
Proportional Directional Valve DPZO-LE-271-L5/D/I
Proportional Directional Valve DPZO-TE-271-S5 40
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-TE-171-L5
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-273-L5
Proportional Directional Valve DPZO-AE-273-L5
Proportional Directional Valve DPZO-AE-373-S5
Proportional Directional Valve DPZO-AES-PS-273-L5/IZ
Proportional Directional Valve DPZO-TE-171-L5
Proportional Directional Valve DPZO-TE-173-S5/I
Proportional Directional Valve DPZO-TE-271-L5/D
Proportional Directional Valve DPZO-L-271-L3
Proportional Directional Valve DPZO-L-273-L5
Proportional Directional Valve DPZO-LE-270-S5/G
Proportional Directional Valve DPZO-LE-271-L5
Proportional Directional Valve DPZO-LE-271-L5/D
Proportional Directional Valve DPZO-LE-271-L5/D/I
Proportional Directional Valve DPZO-TE-271-S5 40
Proportional Directional Valve DHZO-A-071-S5
Proportional Directional Valve DHZO-A-073-D5
Proportional Directional Valve DHZO-A-073-D5/18
Proportional Directional Valve DHZO-A-073-L5 DPZO-A-251-D5 Proportional Directional Valve
ATOS proportional directional 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, such as ordinary solenoid straight-through 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 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 is 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.
The company mainly deals with European and American brands and can source brands from any European country. For example, our 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
