MOOG D661-4577C servo valve from the USA is in stock.

Brand

MOOG/American Moog

Application Areas

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

American MOOG servo valves primarily refer to electro-hydraulic servo valves. After receiving an electrical analog signal, they output modulated flow and pressure accordingly. They are both electro-hydraulic conversion elements and power amplification elements, capable of converting low-power, weak electrical input signals into high-power hydraulic energy (flow and pressure) output.

American MOOG Servo Valve Principle

A typical American MOOG servo valve consists of a permanent magnet torque motor, nozzle, baffle, valve core, valve sleeve, and control chamber (see figure). When current is applied to the input coil,

the baffle moves to the right, strengthening the throttling effect of the right nozzle, reducing the flow rate, and increasing the back pressure on the right side; simultaneously, it reduces the throttling effect of the left nozzle, increasing the flow rate, and decreasing the back pressure on the left side. The forces at both ends of the valve core become unbalanced, causing the valve core to move to the left. High-pressure oil flows from S to C2, delivering it to the load. Load return oil flows through C1 through the return port and enters the oil tank. The displacement of the valve core is proportional to the input current of the torque motor. The hydraulic pressure acting on the valve core is balanced by the spring force. Therefore, in equilibrium, the differential current of the torque motor is proportional to the displacement of the valve core. If the input current is reversed, the flow rate is also reversed. The table shows the classification of servo valves.

American MOOG servo valves are mainly used as actuators in electro-hydraulic servo systems (see Hydraulic Servo Systems). In servo systems, hydraulic actuators, compared with electric and pneumatic actuators, have advantages such as faster response, higher power output per unit weight, smoother transmission, and stronger anti-interference capabilities. On the other hand, electrical components are often used for signal transmission and characteristic correction in servo systems. Therefore, modern high-performance servo systems also adopt electro-hydraulic methods, and servo valves are essential components of such systems.

American MOOG servo valves have a relatively complex structure, high cost, and high requirements for oil quality and cleanliness. New servo valves are attempting to overcome these shortcomings, such as servo valves using electrostrictive elements, which greatly simplify the structure. Another direction is the development of special working oils (such as electroviscous oils). This type of working fluid can change its viscosity under the influence of electromagnetic fields. This property allows for direct control of the oil flow via electrical signals.

D661-4636

D661-4059

D661-4060

D661-G35JOAA4NSX2HA

D661-4506C/G23JOAA6VSX2HA

D661-4315C

D661-4577C

D661 G60HOAO4NSD2HA

D661Z571C/H09HOGBENCO7

D661-571C/H09HOGBENCO9

D661-4506C

D661-431D-4

D661-4444C/G60JOAA6VSX2HA

D661-4384C

D661-4469C

D661-4341C

D661-4731/P80HABW5NSX4-O D661-4195/P80JABF6VSX2-A

D661-4072/P60HAAF5VSX2-A

D661-4010/P60HAAA6NSM2-O

D661-4440E/G60KOCA6VSX2HA

D661-4446C/G45HOAO7VSP2HA

D662-4118B

D662-4006/D02HEBF6NSF2-B

D662-4102

D662-4799

D662-4724

D662-P01JAMF6VSX2-A

D662-4014 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