ATOS proportional valve RZMO-P3-010/100/AM1NSA available now.

Brand

ATOS/Italian Atos

ATOS Proportional Valve Working Principle

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ATOS Proportional Valve Working Principle

ATOS proportional valves generally employ a differential diameter piston structure with unequal pressure-bearing areas at both ends.

The working principle of the ATOS proportional valve is as follows: When the proportional valve is not in operation, the differential diameter piston is at its upper limit position under the action of the spring. At this time, the valve remains open. Therefore, in the initial stage of the synchronous increase of the input control pressure and output pressure from zero, they are always equal. However, the hydraulic force above the piston is greater than the hydraulic force below the piston. During the synchronous increase of the input and output pressures, when the difference in hydraulic force between the upper and lower ends of the piston exceeds the preload of the spring, the piston begins to move downwards. When the input and output pressures increase to a certain value, the valve seat in the piston cavity contacts the valve, and the inlet and outlet chambers are isolated. This is the balanced state of the proportional valve.

If the input pressure is further increased, the piston will rise, and the valve will reopen. Oil continues to flow into the outlet chamber, increasing the output pressure, but the piston then returns to its equilibrium position. The operating point of a proportional valve controlling the rear wheel pipeline pressure is independent of the vehicle's load; this is a non-load-sensing proportional valve. To adapt its operating point to the vehicle's load, the spring force must be adjustable; this is a load-sensing proportional valve.

Generally speaking, servo systems are mostly closed-loop control, while proportional valves are often used in open-loop control. Secondly, there are more types of proportional valves, such as proportional pressure and flow control valves, which offer more flexible control than servo valves. Internally, servo valves often have zero overload, while proportional valves have a certain dead zone, resulting in lower control accuracy and slower response. However, in terms of development trends, especially in proportional directional flow control valves and servo valves, the performance difference between the two is gradually narrowing. Furthermore, proportional valves are significantly cheaper than servo valves and have stronger resistance to contamination.

ATOS Proportional Valve Structure and Principle (Italy):

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 through the SUP port and valve 1. The pressure in the pilot chamber 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 input signal. Because there is no nozzle-baffle mechanism, the valve is insensitive to impurities and has high reliability.

ATOS Proportional Valve Features (Italy):

1) Enables stepless adjustment of pressure and speed, avoiding the impact phenomenon during switching of normally open on/off valves.

2) Enables remote 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.

RZMA-A-010/250/M 21

RZMA-A-030/180/M/7 21

RZMO-A-010/100

RZMO-A-010/210

RZMO-A-010/210/18 20

RZMO-A-010/315

RZMO-A-010/315/18

RZMO-A-010/50

RZMO-A-010/50/18

RZMO-A-030/100 20

RZMO-A-030/210 20

RZMO-A-030/210/18

RZMO-A-030/315

RZMO-AE-010/315 10

RZMO-AE-030/100 40

RZMO-P1-010/100/18/MC 20

RZMO-P1-010/210

RZMO-P3-010/100/AM1NSA

RZMO-P3-010/100/I/AM1NSA

RZMO-P3-010/210/I/AM1NS

RZMO-P3-010/210/I/AMINSA

RZMO-TER-010/100 40

RZMO-TER-010/315 40

RZMO-TER-010/315/I 40

RZMO-TER-030/210 40

RZMO-TER-030/315/I 40

The company mainly produces European and American brands. We can source brands from any European country, including leading German brands such as: 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