What happens first if a chlorine gas system loses its Venturi effect?

When a chlorine gas system loses its Venturi effect, the safety diaphragm is designed to respond immediately. The Venturi effect is a principle that utilizes the flow of chlorine gas, creating a vacuum that draws the gas into the water for disinfection purposes. If this effect fails, it indicates a problem with the system that could lead to unsafe conditions, such as the potential for gas leaks or overfeeding of chlorine.

In such scenarios, the safety diaphragm is a critical safety feature that helps prevent hazardous situations. It automatically slams shut to stop the flow of chlorine gas, effectively isolating the system to mitigate risks. This action is crucial in safeguarding both the operatives and the environment from potential overexposure to chlorine gas, which can be harmful.

Other options do not align with the safety protocols in place when the Venturi effect is compromised. The system would not operate normally since the loss of the Venturi effect indicates a failure in the functioning of the system. A shutdown of the chlorine feed may happen, but as an immediate response, the diaphragm must first intervene to halt the gas flow. The gas release valve opening would typically not occur in response to a loss of Venturi, as that would further exacerbate the danger.