W250 Single-spring Pusher mechanical seals for pump Burgmann mechanical seals HA211 replacement

Features

Single seal Unbalanced Independent of direction of rotation Positive torque transmission due to bayonet drive between seal head and drive collar O-Ring groove for ventilation prevents solids build-up and enhances flexibility

Recommended Application

Pulp and paper industry Water and waste water technology High-viscosity liquids Pulp suspensions Process pumps Pulp pumps

Operating range

Pressure: p = 12 bar (174 PSI) Temperature: t = -20 °C ... 160 °C (-4 °F … +320 °F) Sliding velocity: ... 20 m/s (66 ft/s) Viscosity: ... 300 Pa·s Solids content: ... 7 %

Combination material

Seal face: Silicon carbide Seat: Silicon carbide Secondary seals: EPDM, FKM Metal parts: CrNiMo steel W250 data sheet of dimension in mm