ATOS proportional valve LIMM-4/350/V (Italy)
$228.75
The ATOS proportional valve works on the principle that as the input signal 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, causing the pilot chamber pressure to rise. 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 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 the ratio of the output pressure to the input signal.
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
Features of 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) Compared to intermittent control, the system is simplified, with a significant reduction in components.
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 hydraulic systems, and it is more sensitive to load changes.
5) Low power consumption, low heat generation, and low noise.
6) No fire hazard and no environmental pollution. Less affected by temperature changes. ATOS Proportional Valves
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 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 flow throttling control electrically (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.
Differences between ATOS proportional valves and servo valves:
ATOS proportional valves mainly differ in the following aspects:
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.
The performance of ATOS proportional valves falls between that of servo valves and proportional valves.
ATOS proportional 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 structure, 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.
ATOS proportional valve in-stock inventory:
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
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 DPZ0-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
Our company primarily deals in European and American brands, and can source brands from any European country. For example, our key German brands include: BURKERT, DEMAG, HAWE, AVENTICS, HYDAC, PILZ relays, FESTO, IFM door 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
