ATOS proportional directional valves in stock
$455.41
DKZOR-T-153-L5 The main valve of the Italian ATOS proportional directional valve is controlled by the output pressure of the pre-stage valve, which in turn receives pressure from the inlet (p) of the servo valve. If the pressure at port p is insufficient, the pre-stage valve cannot output enough pressure to actuate the main valve spool. We know that when the load is zero, if the four-way spool valve is open, the pressure at port p = the pressure at port t + the pressure loss at the valve port (ignoring other pressure losses in the oil circuit). If the pressure loss at the valve port is very small, and the pressure at port t is zero, then the pressure at port p is insufficient to supply the pre-stage valve to actuate the main valve spool, and the entire servo valve fails.
Brand
ATOS/Italian Atos
ATOS proportional directional valves are a type of proportional valve used to control flow rate and direction.
Extended 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 requires more components, increases cost, and complicates 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 changing 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 directional valves control flow in two ways: On-off control and Continuous control. On-off control means the valve is either fully open or fully closed, with the flow rate either at its maximum or minimum, without intermediate states. Examples include ordinary solenoid direct-flow valves, solenoid directional valves, and electro-hydraulic directional valves. Continuous control allows the valve to open to any desired degree, thus controlling the flow rate. These valves can be manually controlled (e.g., throttle valves) or electrically controlled (e.g., proportional valves and servo valves). Therefore, the purpose of using proportional or servo valves is to achieve throttling control of flow rate electrically (and, with structural modifications, pressure control, etc., can also be achieved). 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.
ATOS Proportional Directional Valve Structure and Principle:
When the input signal to the ATOS proportional directional valve increases, the pilot valve 1 of the supply solenoid valve switches direction, 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. The pilot chamber pressure 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 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 demonstrating that the output pressure changes proportionally to the change in the input signal. Because there is no nozzle-baffle mechanism, the valve is insensitive to impurities and has high reliability.
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The company primarily deals in European and American brands, and can source brands from any European country. For example, its 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. Other brands include: Henström, MURR, SCHMERSAL, SAMSON, and EPRO (a subsidiary of Emerson). American brands include: MOOG, ASCO, MAC, NUMATICS, PARKER, VICKERS, and ROSS. British brands include: Norgren.
