阀门中英文的基本介绍

阀门中英文的基本介绍 

阀门分自动阀门与驱动阀门。自动阀门（如**阀、减压阀、蒸汽疏水阀、止回阀）是靠装置或管道本身的介质压力的变化达到启闭目的的。驱动阀门（闸阀、截止阀、球阀、蝶阀等）是靠驱动装置（手动、电动、液动、气动等）驱动控制装置或管道中介质的压力、流量和方向。由于介质的压力、温度、流量和物理化学性质的不同，对装置和管道系统的控制要求和使用要求也不同，所以阀门的种类规格非常多。剧不完全统计，我国的阀门产品品种已达四千多个型号，近四万个规格，阀门在经济生活中起着非常大的作用。

There are self-driven valves and operated valves. self-drivenvalves( like safety valve, relief valve, steam trap, check valve )are functioning by utilizing its mechanical design or the pressure,direction of its flow medium.operated valve( like gate valve, globevalve, ball valve, butterfly valve ) is fuctioning by actuator(manual, electric, hydraulic, pneumatic etc. ) or the pressure ,flow direction of its medium. due to the differences of pressure,temperature, flow, and physical-chemical character of its medium ,there are different requirements in designing and applying thepipeline system.therefore there are numerous types ofvalve.according to an unofficial statistics, there are more thanfour thousand types of valve with approximately forty thousandspecifications in China. Obviously, valve is an important elementin the social economy.

（图中所示：调节阀配阀门定位器/气缸配阀门定位器）