H7N

• For stepped shafts
• Single seal
• Balanced
• Super-Sinus-spring or multiple springs rotating
• Independent of direction of rotation
• Integrated pumping device available (H7F, H75F)
• Variant with seat cooling available (H75G115)

• Universal application opportunities (standardization)
• Efficient stock keeping due to easily interchangeable faces
• Extended selection of materials
• Flexibility in torque transmissions
• Self cleaning effect
• Short Installation length possible (G16)

• Refining technology
• Power plant technology
• Petrochemical industry
• Oil and gas industry

• Hot water applications
• Light hydrocarbons

• Boiler feed pumps
• Process pumps

Shaft diameter: d1 = 14 … 100 mm (0.55″ … 3.94″) (Single spring: d1 = max. 100 mm (3.94″)) Pressure: p1 = 80 bar (1,160 PSI) for d1 = 14 … 100 mm, p1 = 25 bar (363 PSI) for d1 = 100 … 200 mm, p1 = 16 bar (232 PSI) for d1 > 200 mm Temperature: t = -50 °C … 220 °C (-58 °F … 428 °F) Sliding velocity: vg = 20 m/s (66 ft/s) Axial movement: d1 up to 22 mm: ± 1.0 mm d1 24 up to 58 mm: ± 1.5 mm d1 from 60 mm: ± 2.0 mm

Seal face: Silicon carbide (Q1, Q2), Carbon graphite antimony impregnated (A), Aluminium oxide (V), CrMo cast steel (S) Seat G9: Carbon graphite antimony impregnated (A), Carbon graphite resin impregnated (B), Silicon carbide (Q1*, Q2*) Secondary seals: EPDM (E), NBR (P), FKM (V), FFKM (K) Springs: CrNiMo steel (G) Metal parts: CrNiMo steel (G), Duplex (G1) * Cannot be combined with seal face made of S

Standards and approvals

• EN 12756