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Shenyang Bonex Valve Manufacturing Factory

Forged steel valves, cast steel valves, stainless steel valves, high temperat...

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home > sell > Check valve, H48Y empty discharge check valve, forged steel check valve, high pressure check valve
Check valve, H48Y empty discharge check valve, forged steel check valve, high pressure check valve
products: Views:8Check valve, H48Y empty discharge check valve, forged steel check valve, high pressure check valve 
brand: 博耐斯
price: 面议
MOQ:
Total supply:
Delivery date: Shipped within 3 days from the date of payment by the buyer
Valid until: Long-term validity
Last updated: 2016-09-24 15:37
 
Details
 空排止回阀作用原理及结构特点

空排止回阀安装在火电机组的高压给水泵出口管道上,防止给水倒流,保护给水泵.该阀配合水泵最小流量自动再循环旁阀工作,当给水泵在低负荷或者出口截门关闭状态时,自动再循环旁路阀应处于开启位置,以保证水泵的安全运行.当空排止回阀开启时,再循环旁路阀就自动关闭.

沈阳博耐斯阀门制造有限公司空排止回阀作用原理及结构特点
1
、作用原理:打开出口阀,给水泵启动,给水达到一定的压力后,阀瓣在给水压力的作用下升一定的高度,推离阀座,给水即流出.同时由于阀瓣的上升,带动连杆转动,拨动排空口阀片,使再循环的刀片式活门向下移动,关闭排空口,当给水流量减少时,阀瓣下落,推动连杆拨开排空阀片,开启再循环门维持水泵最小的允许流量,当停泵时,阀瓣自动下落,关闭阀口通道,防止高压水锤给水系统的破坏.
2
、结构特点:
 A
、博耐斯空排止回阀配合再循环旁路阀工作,维持系统的安全运行.
 B
、主阀瓣上下移动,介质倒流时,借助介质压力及弹簧作用下关闭通道,此时旁路阀开启,当主阀瓣全开时,旁路阀关闭.
 C
、阀瓣密封采用不锈钢堆焊而成,耐磨,抗擦伤性强,密封可靠.
 D
空排止回阀应垂直安装。

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