NSF 61

Why NSF 61, ANSI 61 and CAN 61 Standards Matter  

When components in water systems fail to meet quality standards, the impact on public health can be significant. To help prevent harmful contaminants from leaching into water distribution systems, NSF 61, ANSI 61 and CAN 61 provide a safety benchmark for products that come into contact with drinking water — including mechanical seals. With 11 Canadian provinces and 49 public water agencies in the U.S. requiring compliance, NSF 61, ANSI 61 and CAN 61 standards are a critical component for wastewater management, pulp and paper, pharmaceuticals and food and beverage operators. By choosing NSF 61-certified, or approved, mechanical seals, end users can gain peace of mind that their operations are both performing reliably and contributing to clean drinking water systems. 

NSF 61-certified mechanical seals must undergo rigorous testing and supplier audits to ensure limited chemical contamination, approved supply locations and strict manufacturing guidelines. To meet these guidelines, John Crane engineers its NSF 61-certified mechanical seals with specified wetted materials, designs them to limit hardware modifications and sources all materials from NSF 61-approved locations. Our engineers also carefully control lubricants during the seal assembly process. 

The result? NSF 61-certified O-ring pushers, elastomer bellows and split seals that help operators support public health and reliability.