Working principle of ATOS proportional pressure cartridge valve

Brand

ATOS/Italian Atos

Application Areas

Chemical, Petroleum, Mining, Road/Rail/Marine, Comprehensive

ATOS Solenoid Valves, ATOS Vane Pumps, ATOS Piston Pumps, ATOS Hydraulic Pumps, ATOS Proportional Valves, ATOS Relief Valves

ATOS Cartridge Valve Unit Operating States: Let the pressures at ports A, B, and x be pA, pB, and px respectively, and their effective areas be AA, AB, and Ax respectively. The return spring force at the upper end of the valve core is Ft. When pxAx + Ft > pAAA + pBAB, the valve is closed; when pxAx + Ft ≤ pAAA + pBAB, the valve is open.

In actual operation, the force on the valve core is controlled by the oil flow through port x.

When X returns to the oil tank, the valve is open;

When x is connected to the inlet port, the valve is closed.

A valve that changes the oil flow pattern at the port is called a pilot valve.

The importance of the versatility of the valve orifice design in ATOS cartridge valves lies in mass production. For example, for a specific size of cartridge valve, the orifice size is standardized for mass production. Furthermore, valves with different functions can use the same valve chamber size, such as check valves, cone valves, flow control valves, throttle valves, two-position solenoid valves, etc. If valves of the same size but different functions cannot use different valve bodies, the manufacturing cost of the valve block will inevitably increase, and the advantages of cartridge valves will disappear.

ATOS cartridge valves are widely used in fluid control applications, including solenoid directional valves, check valves, relief valves, pressure reducing valves, flow control valves, and sequence valves. This versatility extends to fluid dynamics circuit design and mechanical practicality, fully demonstrating the importance of cartridge valves to system designers and users. Due to the versatility of their assembly process, the universality of their orifice sizes, and their interchangeability, cartridge valves allow for complete design configurations, making them widely used in various hydraulic machinery.

ATOS Cartridge Valves

Cartridge valves are widely used in various engineering machinery, material handling machinery, and agricultural machinery. Their application is expanding in often-overlooked industrial sectors. Especially in situations where weight and space constraints render traditional industrial hydraulic valves ineffective, cartridge valves prove invaluable. In certain applications, cartridge valves are the choice for improving productivity and competitiveness.

The functions of new cartridge valves are constantly being developed. These new developments will ensure sustainable production benefits in the future. Past experience has shown that a lack of imagination is a limitation to achieving immediate production benefits using cartridge valves.

Cartridge Valve Unit Operating States: Let the pressures at ports A, B, and x be pA, pB, and px, respectively; the effective areas be AA, AB, and Ax, respectively; and the return spring force at the upper end of the valve core be Ft. When pxAx + Ft > pAAA + pBAB, the valve is closed; when pxAx + Ft ≤ pAAA + pBAB, the valve is open.

In actual operation, the force on the valve core is controlled by the oil flow method of port x.

When X returns to the oil tank, the valve is open;

When x is connected to the oil inlet, the valve is closed.

A valve that changes the oil flow method of the port is called a pilot valve.

Applications of Cartridge Valves

A three-way valve consists of two directional valve assemblies connected in parallel, forming one pressure port, one working port, and one return port. The number of operating states of a three-way cartridge valve depends on the number of operating positions of the pilot directional valve.

A four-way valve consists of two three-way valves connected in parallel.

The pilot valve can be a three-position four-way directional valve (see animation).

The pilot valve can also be two two-position four-way directional valves or four two-position three-way directional valves (see animation).

The number of operating states of a four-way cartridge valve depends on the number of operating positions of the pilot directional valve.

ATOS Cartridge Valve Stock List:

LIMHA-2/350-IX 24DC 31

LIMHA-3/350/V-IX 24DC 40 X12A

LIMHA-3/350-IX 24DC 40 X12A

LIMHA-4/350/V-IX 24DC 32 X12A

LIMHC-2/350-IX 230/50/60AC 31

LIMM-1/210

LIMM-1/P/350

LIMM-2/210 20

LIMM-2/350 20

LIMM-3/350 40 X12A

LIMM-3/350/V 40 X12A

LIMM-4/210/V 31

LIMM-4/350/V 31 X12A

LIMM-5/100/V 31

LIMM-5/350 31

LIMM-5/350/V 31X12A

Proportional pressure cartridge valve

LIMZA-A-1/180/M 20

LIMZA-A-3/180/M 40

LIMZO-A-3/210

LIMZO-A-4/210

LIMZO-A-5/315/P 30

LIMZO-AE-4/315 10

LIMZO-TER-4/210 50

LIMZO-TER-4/210/I

LIQV-2 20

LIQV-2/K

LIQZO-A-252S4

LIQZO-L-252L4 50 LIQZO-L-322L4 50

LIQZO-LE-402L4 50

LIQZO-LE-502L4 50

LIQZO-LE-632L4 51

LIQZO-T-252L4

LIQZO-T-252L4 50/PE

LIQZO-T-322L4 50

LIQZO-T-402L4

LIQZO-TE-322L4 50

LIRA-1/100 20

LIRA-1/210 20

LIRA-2/210/V 20

LIRA-3/100

LIRA-4/210/V 11

LIRZO-A-1/210 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