吴江天吴特种安全阀有限公司致力于低压储罐及管道的保护研究，专业生产美标API 2000系列呼吸阀、阻火器、气体调节阀（氮封阀）、紧急泄放阀、人孔等储罐保护产品。同时开发了可用于火电厂空冷系统及汽轮机蒸汽凝汽器的水封式大汽泄放阀；用于真空吸入的负压安全阀；用于水处理系统的真空破坏阀等。也可根据用户的需要生产各类低压及真空泄放阀产品。

    真空破坏阀主要用于水处理系统，安装于管道或容器的最高点。当停泵或快速排水时，管道内将产生真空，此时阀外大气压力高于管道内压力，空气进入管道内部，以防止管道被压瘪。而当开泵时，管道内部的空气将通过微量排气阀排出管道，从而防止水锤的产生，保护管道及水泵的安全。

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.

型号 Model

VB41 真空破坏阀 Vacuum Breaker Valve

VB42 带排气阀真空破坏阀 Vacuum Breaker with Air Release Valve

设计特点 Design Features

u  Caliber 2 ″ ~ 42 ″ (DN50 ~ dn1050);

u  Flange standard shall be ANSI B16.5, Hg / T 20592 ~ 20615, GB / T 9113 and other standards,

u  Selected materials: cast iron, carbon steel, stainless steel, other special materials:

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；