From a safety perspective, how should pump couplings be constructed?

Pump couplings should be constructed to be enclosed from a safety perspective. Enclosed couplings offer several critical benefits that enhance safety in a wastewater treatment environment. They significantly reduce the risk of injuries by preventing accidental contact with moving parts. This enclosure helps contain any debris or materials that could be ejected during operation, reducing the potential for hazards in the workplace.

Furthermore, an enclosed coupling protects against the ingress of dirt and moisture, which can interfere with the operation of the pump and coupling, thus enhancing their reliability and longevity. Properly enclosed couplings also help to minimize noise and vibrations, contributing to a safer and more comfortable working environment for operators and maintenance personnel.

While the other options might seem beneficial in different contexts, they do not align with the primary safety concerns associated with pump couplings.