G772k240A  G77X/77X系列流量控制伺服阀

G77X/77X系列流量控制伺服阀是3路和优选4路应用的节流阀。它们采用高性能的两级设计，额定流量范围为4至57升/分钟(1至15 gpm)，阀芯位置压力降为210 bar(3000 psi)。
该阀的输出级是一个封闭的中心，四路滑动阀芯。先导级为对称双喷嘴和挡板，由双气隙干转矩电机驱动。阀芯位置的机械反馈由一个悬臂弹簧提供。阀门结构简单，坚固耐用，运行可靠，寿命长。
这些阀门适用于具有高动态响应要求的电液位置，速度，压力或力控制系统。G77X/77X非常适合必须具有卓越动态的应用。
本质安全型阀门可用于具有潜在危险环境的应用。特定型号通过FM认证。ATEX.CSA。TIIS和ecex标准。

G77X/77X系列是经过验证的技术，在需要高性能，稳定性和精度的机器中可靠地运行。穆格机械反馈阀旨在提供高可靠性和长使用寿命

G77X/77X系列流量控制伺服阀由一个极化力矩电机和两级液压功率放大组成。电机电枢延伸到磁通回路的气隙中，并在此位置由弯曲管支撑。弯曲管在阀门的电磁和液压部分之间起密封作用。两个电机线圈围绕电枢，一个在弯曲管的每一边。
第一级液压放大器的挡板刚性地附着在电枢的中点上。挡板通过弯曲管延伸并在2个喷嘴之间通过，在喷嘴尖端和挡板之间形成两个可变孔。由挡板和喷嘴可变孔控制的压力被送入第二级阀芯的末端区域。

G771K201A

The G77X/77X Series flow control servo valves are throttlevalves for 3 and preferably 4-way applications. They area high performance, 2-stage design that covers the rangeof rated flows from 4 to 57 l/min (1 to 15 gpm) at 210 bar(3000 psi) valve pressure drop per spool land.
The output stage of the valve is a closed center, four-waysliding spool. The pilot stage is a symmetrical double-nozzleand flapper, driven by a double air gap, dry torque motor.Mechanical feedback of spool position is provided by acantilevered spring. The valve design is simple and ruggedfor dependable, long life operation.
These valves are suitable for electrohydraulic position,speed, pressure or force control systems with high dynamicresponse requirements. The G77X/77X is ideally suited forapplications where superior dynamics are a must.
Intrinsically safe valve versions are available for use inapplications with potentially hazardous environments.Specific models are certified to FM. ATEX.CSA. TIIS andECEx standards.

The G77X/77X Series is proven technology that performsreliably in machines where high performance, stability andaccuracy are required. Moog’s Mechanical Feedback Valvesare designed to provide high reliability and long service life

The G77X/77X Series Flow Control Servo Valve consistsof a polarized electrical torque motor and two stagesof hydraulic power amplification. The motor armatureextends into the air gaps of the magnetic flux circuit andis supported in this position by a flexure tube. The flexuretube acts as a seal between the electromagnetic andhydraulic sections of the valve. The 2 motor coils surroundthe armature, one on each side of the flexure tube.
The flapper of the first stage hydraulic amplifier is rigidlyattached to the midpoint of the armature. The flapperextends through the flexure tube and passes between 2nozzles, creating two variable orifices between the nozzletips and the flapper. The pressure controlled by the flapperand nozzle variable orifice is fed to the end areas of thesecond stage spool.