Italian ATOS proportional valve DHA-0631/2/A/PA-M/7 in stock

Brand

ATOS/Italian Atos

ATOS Gear Pumps, ATOS Axial Piston Pumps, ATOS Vane Pumps, ATOS Hydraulic Cylinders, ATOS Relief Valves, ATOS Proportional Valves

Differences between ATOS proportional valves and servo valves:

Mainly in the following aspects:

1. Different drive devices. The drive device of a proportional valve is a proportional electromagnet; the drive device of a servo valve 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.

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 also known as 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 stock list:

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

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

ATOS proportional valves can control flow in two ways: one is on/off control: either fully open or fully closed, the flow rate is either maximum or minimum, with no intermediate state, such as ordinary solenoid straight-through valves, solenoid directional valves, and electro-hydraulic directional valves. The other is continuous control: the valve port can be opened 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 valves or servo valves is to achieve flow throttling control in an electronic manner (of course, pressure control can also be achieved through structural modifications). Since it is throttling control, there will inevitably be energy loss. The difference between servo valves and other valves is that their energy loss is greater because they require a certain flow to maintain the operation of the pre-stage control circuit.