RJWMG
Mechanical Seals For Pumps
Features
- For plain shafts
- Single and dual seal
- Elastomer bellows rotating
- Balanced
- Independent of direction of rotation
Recommended applications
- Fresh water supply
- Building services engineering
- Waste water technology
- Food technology
- Sugar production
- Pulp and paper industry
- Oil industry
- Petrochemical industry
- Chemical industry
- Water, waste water, slurries (up to 5 % by weight)
- Pulp (up to 4 % otro)
- Latex
- Dairies, beverages
- Sulfide slurries
- Chemicals
- Oils
- Chemical standard pumps
- Helical screw pumps
- Stock pumps
- Circulating pumps
- Submersible pumps
- Water and waste water pumps
Material
- Seal face: Carbon graphite antimony impregnated (A), Carbon graphite resin impregnated (B), Silicon carbide (eSiC-Q7, Q1)
- Seat: Silicon carbide (eSic-Q7, Q1), Tungsten carbide (U3)
- Elastomer: NBR (P), EPDM (E), FKM (V), HNBR (X4)
- Metal parts: CrNiMo steel (G), Hastelloy® (M)
Operating range
- Shaft diameter: d1 = 14 … 110 mm (0.55" ... 4.33")
- Pressure: p1 = 18 bar (261 PSI), vacuum ... 0.5 bar (7.25 PSI), up to 1 bar (14.5 PSI) with seat locking
- Temperature: t = -20 °C … +140 °C (-4 °F … +284 °F)
- Sliding velocity: vg = 10 m/s (33 ft/s)
- Admissible axial movement: ±2.0 mm (±0.08")
Standards and approvals
- Various material approvals available (depending on type and material combinations). Please inquire!
- FDA
- WRAS
- UBA (KTW)
- ACS
- W270
Notes
- The eMG can also be used as a multiple seal in tandem or in a back-to-back arrangement, please inquire. Other materials and designs available on request.
Advantages
- Small outer diameter of bellows support (d b min) enables direct retaining ring support, or smaller spacer rings
- Optimal alignment characteristic through self-cleaning of disk/shaft
- Improved centering across entire pressure operating range
- No torsion on bellows
- Shaft protection over entire seal length
- Protection of seal face during installation due to special bellows design
- Insensitive to shaft deflections due to large axial movement ability