Check whether the model and specification of the mechanical seal meet the design requirements and ensure that all parts are complete and undamaged. The key points to check are whether the end faces of the moving and stationary rings are flat, free of scratches or cracks, and whether the spring compression amount complies with the standard (error ±2.00 millimeters). Rubber O-rings should be compatible with lubricants. If oil is not suitable, soapy water or silicone grease can be applied.

The materials of mechanical seals are diverse. Different components select different materials based on their functional requirements. The following is a detailed introduction from four aspects: sealing surface materials, auxiliary sealing ring materials, elastic element materials, and structural component materials:

In industrial operations—from chemical processing plants to wastewater treatment facilities, and from power generation units to food and beverage production lines—preventing fluid leakage from rotating equipment is critical. Leaks not only waste valuable resources but also pose safety hazards, damage machinery, and lead to costly downtime. This is where mechanical seals come into play: they are the unsung heroes that ensure rotating shafts (in pumps, compressors, mixers, and agitators) remain sealed, keeping fluids contained and operations running smoothly. But what exactly is a mechanical seal, and how does it work? Let’s break it down.