Understanding Vapor Lock In Chemical Metering Pumps And Simple Solutions

In water treatment, chemical metering pumps are used to deliver precise volumes of chemicals, including sodium hypochlorite, peracetic acid, or other disinfectants, into water systems. These pumps are crucial for maintaining water quality and safety. Depending on the type of pump, the chemical being dosed, and other operational conditions, operators can experience vapor locking. This phenomenon occurs when gases, typically formed due to the volatility of certain chemicals, accumulate within the pump head. Since gas is compressible, it prevents the proper movement of liquid, creating a blockage that can result in an improper dose, no dose at all, or even cause the pump to stop functioning. Vapor lock not only compromises dosing accuracy but can also lead to system inefficiencies or safety hazards. This article will explore the common causes of vapor lock, how it impacts pump performance, and provide practical tips for minimizing or preventing this issue in water treatment systems.