产品详情：8405-052 wOODWARD VariStroke致动器  调速器

Varistroke l解?决了汽轮机用户的首要可靠性问题...污油!

伍德沃德VarStroke致动器的专利而苏脏和自清洁技术确保您的蒸汽透平机具有更高的整体可靠性。线性电动液压阀致动器的可变冲程系列操作机械栩伛动或发电机驱动的蒸汽涡轮机。这些线性致动器利用低压液压由源(通常为润轮润滑油)来提供翰出轴力。其卓越的精度和分辨率使其成为蒸汽阀控制和相关汽轮机转速和负载控制的理想选择，在这些应用中，汽轮机的正常运行时间和可用性至关重要。

VariStroke系列可通过简单易用的基于计算机的PC服务工具进行配置，允许用户轻松配置、校准和调整所有内部功确绣和响应设置。其集成驱动器包括一个4-20 mA输出通道，用于指示输出轴(控制阀)位置，以及装置报警和停机继电器输出，用作装置健康和状态指示。4-20 mA按需输入和双冗余轴位置传感器使其即使在按需输入或反馈传感器故障的情况下也能继续运行，从而确保延长强制停机和在线系统维修之间的运行时间。

这种完全集成的致动器的总安装成本很低，因为它是在工厂完全组装和测赋的，大大减少了OEM和最终用户的制造、测试和现场组装时间。在改型应用中,变中程致动器可用于直接取代现有的伺服系统。这节省了对现有和老化同服系统的昂贵维修，消除了为过时设备获取备件的困难，并减少了校准时j间和难度。

耐脏设计:

两个移动部件50磅切屑剪切力自洁阀设计

可变/可配置轴行程长度快速压摆率/时间:

依赖于应用

500 psi供应压力空载时，转换速率高达762毫米/秒(30英寸/秒)精确位詈控制

侧向负载容许:轴承

三重密封技术集成驱动器:4-20童安

包括阀门流量线性化表冗余MLDT位置传感器通过危险场所认证

Varistroke l solution? Determines the primary reliability problem for turbine users... Dirty oil!

Woodward's patented VarStroke actuators and self-cleaning technology ensure greater overall reliability for your steam turbine. Variable stroke series of linear electro-hydraulic valve actuators operate machines such as stoichiometric or generator-driven steam turbines. These linear actuators use low pressure hydraulic pressure to provide axial force from a source (usually a lubricant). Its superior accuracy and resolution make it ideal for steam valve control and associated turbine speed and load control, where turbine uptime and availability are critical.

The VariStroke series can be configured with an easy-to-use computer-based PC service tool that allows users to easily configure, calibrate and adjust all internal precision and response Settings. Its integrated drivers include a 4-20 mA output channel to indicate the position of the output shaft (control valve), and device alarm and shutdown relay outputs for device health and status indication. The 4-20 mA on-demand input and dual redundant shaft position sensors enable continued operation even in the event of an on-demand input or feedback sensor failure, ensuring extended uptime between forced downtime and online system repairs.

The total installation cost of this fully integrated actuator is low because it is fully assembled and tested at the factory, significantly reducing manufacturing, testing and field assembly time for Oems and end users. In retrofit applications, variable medium range actuators can be used to directly replace existing servo systems. This saves costly repairs to existing and aging coservice systems, eliminates the difficulty of obtaining spare parts for obsolete equipment, and reduces the difficulty of calibration.

Dirt resistant design:

Two moving parts 50 lb chip shear force self-cleaning valve design

Variable/configurable shaft stroke length Fast swing rate/time:

Application dependent

500 psi supply pressure unloaded, conversion rates up to 762 mm/s (30 in/s) precise wiper control

Lateral load tolerance: bearing

Triple seal technology integrated drive :4-20 Tong safety

Includes valve flow linearization meters redundant MLDT position sensors certified for hazardous sites

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