美国费希尔Fisher-POSI-SEAL?A41高性能蝶阀
调节阀也叫做控制阀，在工业自动化过程控制领域中，通过接受调节控制单元输出的控制信号，借助动力操作去改变介质流量、压力、温度、液位等工艺参数的最终控制元件。一般由执行机构和阀门组成。如果按行程特点，调节阀可分为直行程和角行程；按其所配执行机构使用的动力，按其功能和特性分为线性特性，等百分比特性及抛物线特性三种。调节阀适用于空气、水、蒸汽、各种腐蚀性介质、泥浆、油品等介质
Fisher? POSI-SEAL? A41（A41高性能调节蝶阀产品简介）：
POSI-SEAL? A41 is a high-performance butterfly featuring a double D shaft for on-off service. A41 is available in NPS 2 through 12, CL150 and CL300. The NPS 2 valve is multi-rated to CL150/300/600. A41 along with 1035 Rack and Pinion
Actuator is part of the POSI-SEAL Package.
Features and Benefits:
Exceptional Shutoff—Patented bidirectional soft seal ring with pressure-assisting action results in exceptional shutoff rates as shown in the specifications.
Shaft Retention—Redundant shaft retention provides added protection. The packing follower and shaft step interact to hold the shaft securely in the valve body.
Easy Installation—The valve body self-centers on the line flange bolts as a fast, accurate means of centering the valve in the pipeline.
Sour Service Capability—Materials are available for applications handling sour fluids and gases. These materials comply with the requirements of NACE MR0175-2002.
Improved Environmental Capabilities—The optional ENVIRO-SEAL? packing system is designed with improved sealing, guiding, and loading force transmission. The ENVIRO-SEAL packing system can control emissions to below the EPA (Environmental
Protection Agency) limit of 100 ppm (parts per million) for valves.
Low Cost Maintenance—Inpidual disc/shaft components can be replaced after disassembly due to sleeve and taper pin connections.
美国Fisher费希尔-POSI-SEAL-A41高性能调节蝶阀
