M7N Pusher Seals - Mechanical Seals For Pumps

产品介绍

Item	Part no. to DIN 24250	Description
1.1	472	Seal face
1.2	485	Drive collar
1.3	474	Thrust ring
1.4	412.1	O-Ring
1.5	477	Spring
1.6	904	Set screw
2	475	Seat (G9)
3	412.2	O-Ring

1) d1 > 100 mm: 30°
2) d1 > 100 mm: +0.1
3) d1 > 100 mm: H7




Features

• For plain shafts
• Single seal
• Unbalanced
• Super-Sinus-spring
• Independent of direction of rotation

Advantages

• Universal application opportunities
• Efficient stock keeping due to easily interchangeable faces
• Extended selection of materials
• Insensitive to low solids contents
• Flexibility in torque transmissions
• Self cleaning effect
• Short installation length possible (G16)
• Pumping screw for media with higher viscosity (M7..F)

Operating range

Shaft diameter:
d1 = 14 ... 100 mm (0.55 " … 3.94 ")
Pressure:
p1 = 25 bar (363 PSI)
Temperature:
t = -50 °C ... +220 °C
(-58 °F ... +428 °F)
Sliding velocity:
vg = 20 m/s (66 ft/s)

Axial movement:
d1 = up to 25 mm: ±1.0 mm
d1 = 28 up to 63 mm: ±1.5 mm
d1 = from 65 mm: ±2.0 mm

Materials

Seal face: Silicon carbide (Q1)
Seat G9: Carbon graphite antimony impregnated (A), Carbon graphite resin impregnated (B), Silicon carbide (Q1)
Seat G4, G6 (Q1), Seat G13 (A, B)

Secondary seals: EPDM (E), FKM (V), FFKM (K)
Springs: CrNiMo steel (G)
Metal parts: CrNiMo steel (G), Duplex (G1)



Standards and approvals

• EN 12756
• WRAS
• UBA(KTW)

Recommended applications

• Process industry
• Chemical industry
• Pulp and paper industry
• Water and waste water technology
• Shipbuilding
• Lube oils
• Low solids content media
• Water / sewage water pumps
• Chemical standard pumps
• Vertical screw pumps
• Gear wheel feed pumps
• Multistage pumps (drive side)
• Circulation of printing colors with viscosity 500 ... 15,000 mm²/s.