英国斯派莎克不锈钢止回阀DCV3中文版介绍：
DCV2和DCV3为碟片式法兰对夹安装止回阀，可***应用于过程管道、热水系统、蒸汽和冷凝水等系统中的各种流体，连接尺寸符合EN558 Part1，Series49。
英国斯派莎克DCV3止回阀标准产品为金属阀座，用于蒸汽系统。当用于油、空气、气体和水系统时可以选用其他材料的阀座。
主：对夹式止回阀不适合用于有严重脉动的场合，比如压缩机。
DCV系列止回阀结构紧凑，安装简便。可安装在垂直或水平管道或倾斜管道，只需简单的两片法兰对夹安装即可。
DCV止回阀可用于蒸汽和各种液体、气体等工业系统中，并可根据实际应用提供各种选择:
斯派莎克不锈钢止回阀DCV3阀座选择:
金属阀座(metal):-适用于蒸汽或其它高温流体系统。
温度范围 -200℃~400℃。
橡胶阀座(Viton):-适用于油及气体系统，可确保良好密封。
温度范围 -15℃~250℃。
三元乙丙阀座(EPDM):-适用于水系统。
温度范围 -50℃~150℃
弹簧选择:
标准弹簧 - 用干蒸汽、水及其它多种工业流体系统中。
镍铬合金弹簧 - 用于高温系统。
特强弹簧 - 用于锅炉给水系统。
无弹簧 - 用于低流动压损系统。仅用于流向垂直向上的管道中。
斯派莎克DCV3对夹止回阀又称为逆流阀、逆止阀、背压阀、单向阀。这类阀门是靠管路中介质本身的流动产生的力而自动开启和关闭的，属于一种自动阀门。
这种类型的阀门的作用是只允许介质向一个方向流动，而且阻止反方向流动。通常这种阀门是自动工作的，在一个方向流动的流体压力作用下，阀瓣打开；流体反方向流动时，由流体压力和阀瓣的自重合阀瓣作用于阀座，从而切断流动。
Spirax Sarco Check Valve Details:
Spirax Sarco provides various forms of non-return valve , which can effectively prevent the backflow of fluid pipes . Easy to install and maintain .
DCV Series Check Valve Disc Check Valves
L bad check valve DCV system compact structure , easy to install. Can be installed in vertical or horizontal pipe or inclined pipelines , simply two flanges on the folder to install.
DCV2 / B Series Check Valve uses a special structure , specifically for boiler feed water, boiler water to prevent backflow .
DCV check valve for steam and a variety of liquids, gases and other industrial systems , and provides various options depending on the application :
Seat options:
Spirax Sarco metal seat (metal): - suitable for steam or other high temperature fluid systems .
Temperature range -200 ℃ ~ 400 ℃.
Rubber seat (Viton): - applies to oil and gas systems , to ensure a good seal .
Temperature range -15 ℃ ~ 250 ℃.
EPDM seat (EPDM): - for water systems.
Temperature range -50 ℃ ~ 150 ℃
Spirax Sarco check valve spring options:
Standard spring - with a dry steam, water and many other industrial fluid system .
Nickel-chromium alloy spring - for high temperature systems.
Strong spring - for boiler feedwater system .
No springs - for low flow pressure loss system . only for vertically upward flow in the pipeline .
Spirax Sarco SDVC series check valves Split Disc Check Valves
SDCV series split disc check valve flange on the clip can be used for a variety of industrial fluids such as steam , condensate , hot water system, prevent backflow of fluids in pipes .
Offers a variety of material selection, maximum diameter of DN300.
LCV Series Check Valve Lift Check Valves
LCV Series lift check valves installed in horizontal pipe can be used for a variety of steam , condensate and hot water systems.
The connection is a threaded connection , the maximum diameter of 80mm (3 ").
LCV Series Check Valve Lift Check Valves
LCV Series lift check valves installed in horizontal pipe can be used for a variety of steam , condensate and hot water systems.
Connection to threaded connections , the maximum diameter of 80mm (3'').