RJWH7N
Mechanical seals for pumps
Features
- 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)
Recommended applications
- Process industry
- Oil and gas industry
- Refining technology
- Petrochemical industry
- Chemical industry
- Power plant technology
- Pulp and paper industry
- Food and beverage industry
- Hot water applications
- Light hydrocarbons
- Boiler feed pumps
- Process pumps
Advantages
- 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)
Material
- 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)
Operating range
- 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