ATOS proportional valve DHZO-T-071-S5 in stock
$372.52
Features of Italian ATOS proportional valves: 1) Enables stepless adjustment of pressure and speed, avoiding the shock phenomenon during switching of normally open on/off pneumatic valves. 2) Enables remote and program control. 3) Simplifies the system and greatly reduces the number of components compared to intermittent control. 4) Compared to hydraulic proportional valves, it is smaller, lighter, simpler in structure, and lower in cost, but its response speed is much slower and it is more sensitive to load changes. 5) Low power consumption, low heat generation, and low noise. 6) Does not cause fires and does not pollute the environment. (Affected by temperature changes)
Brand
ATOS/Italian Atos
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ATOS proportional valves differ mainly in the following aspects:
1. Different drive devices. The drive device for proportional valves is a proportional solenoid; 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.
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.
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 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 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 type of continuous control, characterized by output varying with input, and a certain proportional relationship exists between the output and input. Proportional control is divided into open-loop control and closed-loop control.
ATOS Proportional Valve Model List:
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
ATOS Proportional 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 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 loop 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 relationship between the output pressure and the change in the input signal. Because it lacks a nozzle-baffle mechanism, the valve is insensitive to impurities and has high reliability.
ATOS proportional valves can control flow in two ways: On-off control and continuous control. On-off control means the valve is either fully open or fully closed, with the flow rate either at its maximum or minimum, without intermediate states. Examples include ordinary solenoid direct-flow valves, solenoid directional valves, and electro-hydraulic directional valves. Continuous control allows the valve to open to any desired degree, 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 electrically (and, with structural modifications, pressure control, etc., can also be achieved). 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.
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
