• Single, balanced mechanical seal with elastomer bellows • Central, non-clogging coil spring • Dual-direction of shaft rotation • Bellows protected against twisting • Easy and quick installation Legend 1. Stationary ring 2. O-ring 3. Rotating ring 4. Bellows 5. Spring 6. Front thrust ring 7. Rear thrust ring Application Universal, general purpose mechanical seal for water/water based solutions, oils, fuels and other fluids even with some content of abrasives and for a very wide operating conditions. Design destined for centrifugal pumps and other rotary equipment in industrial applications (food processing, water systems, wastewater treatment, petrochemical processing, pulp and paper). Note The A41 version of the A4 seal is available, sized to direct application in place of A1 seal (L3 dimension for particular size is the same as for the A1 seal).