旋塞閥、閘閥、截止閥、球閥—用于開啟或關(guān)閉管道的介質(zhì)流動(dòng)。?止回閥（包括底閥）—用于自動(dòng)防止管道內(nèi)的介質(zhì)倒流。?節(jié)流閥—用于調(diào)節(jié)管道介質(zhì)的流量。
      蝶閥—用于開啟或關(guān)閉管道內(nèi)的介質(zhì)。也可作調(diào)節(jié)用。
      安全閥—用于鍋爐、容器設(shè)備及管道上，當(dāng)介質(zhì)壓力趔過規(guī)定數(shù)值時(shí)，能自動(dòng)排除?過剩介質(zhì)壓力，保證生產(chǎn)運(yùn)行安全。
      減壓閥—用于自動(dòng)降低管道及設(shè)備內(nèi)介質(zhì)壓力。系使介質(zhì)經(jīng)過閥瓣的間隙時(shí)，產(chǎn)生阻力造成壓力損失，達(dá)到減壓目的。
      疏水器—用于蒸汽管道上自動(dòng)排除冷凝水，防止蒸汽損失或泄漏。

Cock valves, gate valves, globe valves, ball valves - Medium flow for opening or closing pipes. Check valves (including bottom valves) - used to automatically prevent medium backflow in pipes. Throttle Valve - used to regulate the flow of pipe media.

Butterfly Valve - Medium used to open or close pipes. It can also be used as a regulator.

Safety Valve - Used in boilers, container equipment and pipes. When the medium pressure exceeds the prescribed value, it can automatically eliminate excess medium pressure to ensure the safety of production and operation.

Pressure Relief Valve - Used to automatically reduce medium pressure in pipes and equipment. When the medium passes through the clearance of the valve disc, it produces resistance and causes pressure loss to achieve the purpose of decompression.

Drainage trap - Used for automatically removing condensate water from steam pipeline to prevent steam loss or leakage.