Final answer:
The proportioning method used in foaming systems can affect pump maintenance.
Step-by-step explanation:
The subject of this question is Chemistry. The question is asking about the proportioning method that may cause the pump to require additional maintenance because the foam solution goes through the pump.
In the context of foaming systems, the proportioning method refers to the process of mixing a foam concentrate with water to create a foam solution. There are different methods used to achieve this, such as injection, eduction, premixing, and batch-mixing.
Injection and eduction are two common proportioning methods. In injection, the foam concentrate is injected directly into the water flow through a specialized pump or device. In eduction, the foam concentrate is drawn into the water stream using venturi effect.
While both injection and eduction can be efficient methods, they can also cause additional maintenance requirements for the pump. The foam concentrate may leave residue or residues in the pump, leading to clogging, degradation of pump components, or reduced performance. Regular cleaning and maintenance may be needed to address these issues.