Double Seal Diagram. For double mechanical seals back to back en specifies the short type only. Todays lip seals have multiple parts that affect how the seal performs.
Mechanical seals according to en 12756 code system for single mechanical seals there is a distinction drawn between standard n and short k types. Why no fluid recirculation needed. Elastomers in contact with oilgrease shaft seal failure.
This is the original concept of a dual seal taking two component mechanical seals and placing them back to back within the stuffing box.
Sign in to download full size image figure 813. Top entry mixersagitators with dry seals. Never use oil or grease as assembly lubricant. From small elastomer bellows seals used in millions of domestic water pumps to double mechanical seals that ensure maximum sealing safety and large highly customized dry running gas seals for mission critical high speed turbo compressors john crane has the right product for any.