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碟片式止回阀

产品介绍:

蝶片式止回阀是指依靠介质本身流动而自动开、闭阀瓣,用来防止介质倒流的阀门,又称逆止阀单向阀、逆流阀、和背压阀止回阀属于一种自动阀门,其主要作用是防止介质倒流、防止泵及驱动电动机反转,以及容器介质的泄放。止回阀还可用于给其中的压力可能升至超过系统压的辅助系统提供补给的管路上。止回阀主要可分为旋启式止回阀(依重心旋转)、升降式止回阀(沿轴线移动)、蝶片式止回阀(沿中心旋转)。

Butterfly disc check valve is a valve that automatically opens and close valve discs depending on the flow of the medium itself, and it is also used to prevent the backflow of the medium. It is also called the check valve, check valve, counterflow valve and back pressure valve. Check valve is a kind of automatic valve, its main function is to prevent the reverse flow of the medium, prevent the reversal of the pump and drive motor, and the discharge of the container medium. The check valve can also be used to provide a supply line for the pressure in which the pressure may be raised above the system pressure auxiliary system. The check valves can be mainly divided into rotary check valves (center of gravity rotation), lifting check valves (moving along the axis), butterfly disc check valves (along the center).

作用

蝶片式止回阀的作用是只允许介质向一个方向流动,而且阻止方向流动。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。


Effect

The function of a butterfly check valve is to allow only the medium to flow in one direction, and to prevent the flow of direction. Usually, the valve is automatically operated. Under the action of a fluid pressure flowing in one direction, the valve flap opens. When the fluid flows backward, the flow pressure and the self closing valve of the disc are acting on the valve seat to cut off the flow.


碟片式止回阀DISC CHECK VALVE



主要零件的材料Material for the main parts

零件名称

Part

name

阀体阀盖

阀瓣

Valve body,

valve cover, valve disc

密封面

Sealing

 surface

摇杆

rocker

销轴

Pin shaft

垫片

Shim

零件材料

Part

material

碳钢

carbon steel

堆焊硬质合金

Hardfacing

 hard alloy

碳钢

carbon steel

铬不锈钢

Chromium

stainless steel

柔性石墨+304

Flexible graphite+304



技术参数
Technical parameter

公称通径Nominal path

DN(mm)

40800

公称压力Nominal pressure

PN(Mpa

1.02.5

缓闭时间Slow closing time

360s

 

适用介质Applicable medium

清水、污水、海水

 

适用温度Applicable temperature

080℃

 

零件材料Part material

名称Name

材料Material

阀体Valve body

灰铸铁铸钢、不锈钢等Grey cast iron, cast steel, stainless steel, etc

阀盖Valve cover

钢板、不锈钢Steel plate stainless steel

阀瓣Valve clack

丁腈橡胶NBR

阀轴Valve shaft

不锈钢Stainless steel

 

外型尺寸和重量/Prime out-form dimensions and weigh

产品型号

Product model

外径

External diameter

内径

Internal diameter

厚度

Thickness

重量

weight

 

 

14.2CM

3.5CM

1.9CM

2.1KG

 

安装事项


止回阀的安装应注意以下事顶:

1、在管线中不要使止回阀承受重量,大型的止回阀应独立支撑,使之不受管系产生的压力的影响。

2、安装时注意介质流动的方向应与阀体所票箭头方向一致。

3、升降式垂直瓣止回阀应安装在垂直管道上。

4、升降式水平瓣止回阀应安装在水平管道上

Installation matters

The installation of the check valve should be paid attention to the following:

1. Do not bear the weight of the check valve in the pipeline. The large check valve should be supported independently so that it is not affected by the pressure produced by the pipe system.

2. When installing, the direction of the flow of the medium should be in accordance with the direction of the valve.

3. The lifting type vertical valve should be installed on the vertical pipe.

4. The lift horizontal valve check valve should be installed on the horizontal pipe

  

安装和使用

1本阀门通路两端须堵塞,存在干燥通风的室内。如长期存放,应经常检查防锈蚀。

2安装前应将阀门清洗干净,并消除在运输过程中造成的缺陷。

3安装时必须仔细核对阀门上的标志和铭牌是否符合使用要求。

4本阀门安装在水平管道上,阀盖向上。

Installation and use

1, the valves at both ends of the valve must be blocked, and there is a dry and ventilated room. Corrosion protection should be regularly checked for long-term storage.

2, before installation, the valve should be cleaned and the defects caused in the transportation process are eliminated.

3, the installation must carefully check the sign on the valve and whether the nameplate is in accordance with the requirements.

4. The valve is installed on the horizontal pipe and the valve cover is upwards.




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