Chemineer mechanical seal for Chemical pump

Temperature -20℃ to +120℃
Pressure ≤1.2Mpa
Speed ≤15m/s
Material B,A1,Q1,Q2,U2,P,E,N,V,F,G,Alfa

Type:Wave Spring Mechanical Seal

Replacement:Burgmann M7N/M74/M74F

Temperature:-20℃ to +120℃

Pressure:≤1.2Mpa

Speed:≤15m/s

Material:B,A1,Q1,Q2,U2,P,E,N,V,F,G,Alfa

Features

• For plain shafts

• Single seal

• Unbalanced

• Super-Sinus-spring or multiple springs rotating

• Independent of direction of rotation

• Pumping screw for media with higher viscosity (M7..F)

• Variant with PTFE secondary seals for high chemical 

resistance (M78N)

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) 

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 =…25 mm: ±1 mm

d1 = 28…63 mm: ±1.5 mm

d1 = from 65 mm: ±2 mm

Materials

Seal face: Special cast CrMo steel (S), Silicon carbide 

(Q1, Q2), Aluminium Oxide (V)

Seat G9: Carbon graphite antimony impregnated (A), 

Carbon graphite resin impregnated (B), Silicon carbide 

(Q1*, Q2*) 

Seat G4: Silicon carbide (Q1*, Q2*) 

Seat G6: Silicon carbide (Q1*, Q2*) 

Seat G13: Carbon graphite antimony impregnated (A), 

Carbon graphite resin impregnated (B)

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 in S 

Standards and approvals

• EN 12756

Features

• For plain shafts

• Single seal

• Unbalanced

• Super-Sinus-spring or multiple springs rotating

• Independent of direction of rotation

• Pumping screw for media with higher viscosity (M7..F)

• Variant with PTFE secondary seals for high chemical 

resistance (M78N)

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) 

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)

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

Recommended applications

• Process industry

• Chemical industry

• Pulp and paper industry

• Water and waste water technology

• Shipbuilding

• Food and beverage industry

• 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


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