ATOS pilot-operated relief valve AGMZO-A-10/100 in stock

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

ATOS Pilot-Operated Relief Valve Operation Breakdown:

When the ATOS pilot-operated relief valve is working, hydraulic pressure acts simultaneously on the pressure-sensing surfaces of both the main valve core and the pilot valve core. When pilot valve 1 is not open, there is no oil flow in the valve chamber, and the pressure acting on the main valve core 6 in both the upper and lower directions is equal. However, because the effective pressure-bearing area A2 of the upper end face is greater than the effective pressure-bearing area A1 of the lower end face, the main valve core is in the lowest position under the action of the resultant force, and the valve port is closed. When the inlet oil pressure increases to the point that the pilot valve opens, the fluid flows back to the oil tank through the damping orifice 5 on the main valve core and pilot valve 1. Due to the damping effect of the damping orifice, the hydraulic pressure on the main valve core 6 in the upper and lower directions is unequal. Under the action of the pressure difference, the main valve core moves upward, opening the valve port, realizing overflow, and maintaining a basically stable pressure. The overflow pressure can be adjusted by regulating the pressure regulating spring 9 of the pilot valve.

ATOS pilot-operated overflow valves have various structures. Figure 6.9 shows a typical three-section concentric structure pilot-operated overflow valve, which consists of a pilot valve and a main valve. The valve principle is shown in Figure 6.10.

The ATOS pilot-operated overflow valve, together with the cone-shaped pilot valve 1, the damping orifice (fixed throttling orifice) 5 on the main valve core, and the pressure regulating spring 9, constitutes a pilot-stage half-bridge pressure-dividing negative feedback control, responsible for providing the main stage command pressure P2, after being regulated by the pilot valve, to the upper chamber of the main valve core 6. The main valve core is the comparator of the main control circuit. The upper end face is subjected to the command force P2A2 of the main valve core, and the lower end face is used as the pressure measuring surface of the main circuit, which is subjected to the feedback force P1A1. The resultant force can drive the valve core, adjust the size of the overflow port, and finally achieve the purpose of regulating and stabilizing the inlet pressure P1.

ATOS pilot-operated overflow valve type three-section concentric pilot-operated overflow valve structure diagram (pipe type) [1] 1—Pilot valve (pilot valve); 2—Poppet seat (Poppet Seat); 3—Valve Cap (Valve Cap); 4—Valve Body (Valve Body); 5—Orifice (Damping Orifice); 6—Main Spool (Main Spool); 7—Main Valve Seat (Main Valve Seat); 8—Main Spring (Main Spring); 9—Adjustment Spring (pilot valve) spring; 10—Adjusting screw; 11—Adjusting handwheel. AGMZA-A-10/250/M

AGMZA-A-10/250/PA-M

AGMZA-A-10/80/PA-GK21

AGMZA-A-10/80/PA-GK/2421

AGMZA-A-20/250/M

AGMZO-A-10/100

AGMZO-A-10/100/Y20

AGMZO-A-10/210

AGMZO-A-10/210/18

AGMZO-A-10/210/E

AGMZO-A-10/210/Y

AGMZO-A-10/315

AGMZO-A-10/315/E20

AGMZO-A-10/315/Y AGMZO-A-20/210

AGMZO-A-20/315

AGMZO-A-20/315/Y

AGMZO-A-32/315

AGMZO-AE-10/21010

AGMZO-AE-10/31510

AGMZO-AE-20/315/Y10

AGMZO-AE-32/315

AGMZO-TER-010/210/I

AGMZO-TER-10/100/I

AGMZO-TER-10/210/I

AGMZO-TER-10/315/Y40

AGMZO-TER-20/210

AGMZO-TER-20/315/Y40

ATOS pilot-operated relief valve (plate type) 1—Main valve core; 2, 3, 4—Damping orifices; 5—Pilot valve seat; 6—Pilot valve body;

7—Pilot valve core; 8—Pressure regulating spring; 9—Main valve spring; 10—Valve body

Figure 6.11 shows the structure of a two-section concentric pilot-operated relief valve, whose main valve core is a cone valve with a cylindrical surface. To ensure good sealing when the main valve is closed, the cylindrical guide surface and conical surface of the main valve core 1 must fit well with the valve sleeve, requiring a high degree of concentricity, hence the name "two-section concentric." The main valve core does not have damping orifices; instead, three damping orifices 2, 3, and 4 are located on the valve body 10 and the pilot valve body 6, respectively. Its working principle is the same as that of a three-section concentric pilot-operated relief valve, except that the oil flows from the lower chamber of the main valve to the upper chamber through three damping orifices. Damping orifice 2 and phase 4 are connected in series, equivalent to the damping orifice in the main valve core of a three-section concentric valve. It acts as the inlet throttling port in the half-bridge circuit, creating a pressure difference between the lower chamber of the main valve and the front chamber of the pilot valve. This pressure difference then acts on the upper chamber of the main valve through damping orifice 3, thereby controlling the opening of the main valve core. The main function of damping orifice 3 is to improve the stability of the main valve core; its placement is independent of the bridge circuit.

The company primarily deals in European and American brands and can source brands from any European country. For example, 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