Which of the following is a characteristic of a dresser coupling?

A dresser coupling is designed specifically for connecting two non-flanged ends of a pipeline. It typically features a slip-on design that allows it to be easily installed over the ends of the pipes being joined, which is beneficial for creating a reliable and leak-proof connection. This design allows for flexibility in alignment and helps accommodate thermal expansion or contractions in the pipeline system.

Dresser couplings are commonly used in applications where rigid end connections might not be feasible, providing a practical solution for joining pipes in various industries, including those involving liquids and gases. By utilizing gaskets or seals within the coupling, they ensure a tight fit that minimizes the likelihood of leaks under pressure.

The other options pertain to different types of fittings and devices not specifically related to the characteristics of a dresser coupling. For instance, a slip-on collar for flanged ends indicates that the design is not addressing the specific application of a dresser coupling. Similarly, references to valves and safety devices relate to other critical components of pipeline systems but do not accurately describe the function or purpose of a dresser coupling.