a) 螺纹连接的多回转阀门、止回阀和球阀中的连接螺纹多为符合美国国家标准协会ANSI的锥形阴螺纹，通常用于DN65和DN80管道上。
　　a) Threaded-end multi-turn valves, check valves and ball valves with ANSI female taper threads are most commonly used with pipe up to 2 1/2” or 3”.

　　b) 焊接连接端口可以将通径达DN80的青铜多回转阀门、止回阀和球阀直接连接在铜管上。在焊接过程中，必须要小心谨慎，避免由于温度过高导致阀门受到损害。
　　b) Solder-end valves permit directly connecting bronze multi-turn valves, check valves and ball valves up to 3” to copper tubing. Care must be taken not to overheat and damage valves during the soldering process.

　　c) 法兰连接常用于DN50以上的多回转铸铁阀门的安装上。
　　c) Flanged-end connections are the most common used design for installation of iron multi-turn valves 2” and larger.

　　d) 平板（对夹）和凸耳阀体主要用于蝶阀和升降式/双门止回阀上，这种结构的阀门在两个法兰之间安装容易迅速。
　　d) Wafer and lug body styles are used with butterfly valves and lift/double-door check valves for quick, easy installation between two flanges.

　　e) DN50以上的管状连接端口的球阀、蝶阀和止回阀安装最迅速。
　　e) Grooved end ball, butterfly and check valves permit the quickest installation sizes 2” and larger.