Location of the vacuum breaker
Thread Content
There are two series-connected negative-pressure washing towers on site; where is the appropriate location to install the vacuum breaker? Is it the exit of the first tower or the exit of the second tower? Is the exit better than the entrance?
Generally, between the re-pump and your device, a buffer tank is installed, and a vent valve is placed on that buffer tank
Any of them will work; some are installed at the inlet of the vacuum pump, while others have nitrogen pipes added to the negative-pressure equipment for breaking the vacuum
The situation on site is that there is a pressure measurement point at the inlet of the first tower; the vacuum break valve serves to allow air to enter. The vacuum is broken when it is detected that the pressure at the inlet of the first tower is too low. By the way, there is another cooler after the second tower; would it be appropriate to place it at the outlet of the second tower?
{:3_49:} To maintain the pressure in a specific tower, add a vacuum breaker upstream of the equipment in that process route. If the pressure drop between the two towers isn’t very large, simply add a branch line before the pump, install a control valve, and link it to negative pressure control
It is usually the buffer tank that loses its vacuum