吳江天吳特種安全閥有限公司致力于低壓儲(chǔ)罐及管道的保護(hù)研究，專(zhuān)業(yè)生產(chǎn)美標(biāo)API 2000系列呼吸閥、阻火器、氣體調(diào)節(jié)閥（氮封閥）、緊急泄放閥、人孔等儲(chǔ)罐保護(hù)產(chǎn)品。同時(shí)開(kāi)發(fā)了可用于火電廠空冷系統(tǒng)及汽輪機(jī)蒸汽凝汽器的水封式大汽泄放閥；用于真空吸入的負(fù)壓安全閥；用于水處理系統(tǒng)的真空破壞閥等。也可根據(jù)用戶(hù)的需要生產(chǎn)各類(lèi)低壓及真空泄放閥產(chǎn)品。

    真空破壞閥主要用于水處理系統(tǒng)，安裝于管道或容器的最高點(diǎn)。當(dāng)停泵或快速排水時(shí)，管道內(nèi)將產(chǎn)生真空，此時(shí)閥外大氣壓力高于管道內(nèi)壓力，空氣進(jìn)入管道內(nèi)部，以防止管道被壓癟。而當(dāng)開(kāi)泵時(shí)，管道內(nèi)部的空氣將通過(guò)微量排氣閥排出管道，從而防止水錘的產(chǎn)生，保護(hù)管道及水泵的安全。

The vacuum breaker is designed to prevent vacuum conditions from occurring in pipes or tanks. After a power failure or rapid draining of the system, a vacuum condition often occurs in a pipe or tank.The pressure difference between the inside vacuum and outside air will cause a downward force on the disc. At vacuum pressures greater than -0.25 psig, the disc will compress the spring and move downward allowing free flow of outside air into the pipe or tank to eliminate the vacuum. When positive pressure is restored in the pipe or tank, the valve will automatically close and seal tightly. Optional valves can be piped to the vacuum breaker to vent trapped air in the pipeline if needed.

型號(hào) Model

VB41 真空破壞閥 Vacuum Breaker Valve

VB42 帶排氣閥真空破壞閥 Vacuum Breaker with Air Release Valve

設(shè)計(jì)特點(diǎn) Design Features

u  口徑 2″~42″(DN50~DN1050); 

u  法蘭標(biāo)準(zhǔn)按可選用 ANSI B16.5 、HG/T 20592~20615、GB/T 9113等標(biāo)準(zhǔn)，

u  選用材料:鑄鐵、碳鋼、不銹鋼、其它特殊材料：

Design Features

u  Sizes available 2″~42″(DN50~DN1050);  

u  The flanges are accordance with ANSI B16.5,HG/T20592、GB/T9113、JIS;

u  Available Materials：Cast Iron、Carbon Steel、Stainless Steel、Special Materials on Application；