The R-HRN single mechanical seal is a fixed rotor seal. Suitable for use in pumps operating in contaminated media with abrasive particles, for wastewater. Can be used as part of a tandem. Stationary assembly with multi-spring block, isolated from the product, preventing sticking and clogging. Applies to pumps Alfa Laval, Ebara (3M, DWO), LOWARA, KSB (Etanorm, Etachrom), WILO (MVI, MHI, IPL), Grundfos (CDM), Saer (IP), Calpeda (GM, MXS), Hecker HN 410su. Analogues: Burgmann HRN, Roten EHS3 seal.