Which characteristic is NOT typically associated with butterfly valves?

Butterfly valves are generally known for their lightweight construction, compact size, and cost-effectiveness. The lightweight construction allows for easier installation and reduces the overall load on supporting structures, making them suitable for various applications, including water, wastewater, and various industrial processes. Their compact size enables them to fit into tight spaces, which is advantageous for systems with limited installation area. Additionally, the manufacturing process of butterfly valves often leads to low production costs, allowing for cost-effective solutions in many piping systems.

In contrast, complex assembly requirements are not a characteristic commonly associated with butterfly valves. These valves are typically designed for straightforward installation and maintenance, often utilizing a simple quarter-turn operation that allows for easy handling and servicing. As a result, the notion of a complex assembly does not align with the practical features and benefits that butterfly valves offer. This makes the identification of complex assembly requirements as the option that is not typically associated with butterfly valves accurate.