The Sulzer Ahlstar single cartridge mechanical seal type R-SE1F-AP is designed for Sulzer Ahlstar APP and Ahlstar APT series process pumps. It is balanced, reducing the risk of failure due to pressure drops, easy to install and maintain, and flushable. Independent of the direction of shaft rotation. Applications: paper industry (fibre mixtures up to 8%, non-fibre mixtures up to 70%, liquids with large solids), chemical industry, agriculture, oil production, etc. Types of John Crane Safematic SE1F, Burgmann LP-Q, Sulzer TB1F, AESSEAL CKSA™.