美国费希尔Fisher-POSI-SEAL®A41高性能蝶阀

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***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 ***ailable 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 specificati***.
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 ***ailable for applicati*** 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 tran***ission. The ENVIRO-SEAL packing system can control emissi*** 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 connecti***.