Eagle Burgmann H74D Mechanical Seal For Chemical Pump

Temperature -20℃ to +180℃
Pressure ≤1.2Mpa
Speed ≤15m/s
Material V1,Q1,Q2,U2,B,A,P,E,V,M1,M2,F,G,M

Type:Double Mechanical Seal

Replacement:Burgmann H74D

Temperature:-20℃ to +180℃

Pressure:≤1.2Mpa

Speed:≤15m/s

Material:V1,Q1,Q2,U2,B,A,P,E,V,M1,M2,F,G,M

Features

• For stepped shafts

• Dual seal

• Balanced

• Rotating multiple springs

• Independent of direction of rotation

• Seal concept based on the H7 range

• Variant with pumping screw available (H74F-D)

Advantages

• Efficient stock keeping due to easily interchangeable 

faces

• Extended selection of materials

• Flexibility in torque transmissions

• Insensitive to low solids contents

• EN 12756 

(For connection dimensions d1 up to 100 mm (3.94"))

Operating range 

Shaft diameter: d1 = 14 … 200 mm (0.55" … 7.87")

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 100 mm: ±0.5 mm

d1 from 100 mm: ±2.0 mm

Materials

Seal face: Silicon carbide (Q1, Q2), Carbon graphite 

antimony impregnated (A), Aluminium oxide (V), 

Special cast CrMo 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 in S

Standards and approvals

• EN 12756

Materials 

Seal face: Silicon carbide (Q1), Aluminium oxide (V)

Seat: Carbon graphite resin impregnated (B), Carbon 

graphite antimony impregnated (A), Silicon carbide (Q1)

Elastomers: NBR (P), EPDM (E), FKM (V), FFKM (K)

Metal parts: CrNiMo steel 1.4401 (G)

Recommended applications

• Chemical industry

• Pharmaceutical industry

• Building services industry

• Centrifugal pumps

• Clean water pumps

Certificates

• KTW / UBA

• W270

• ACS

• WRAS

• NSF

• DM 174/04

• FDA

Item Description

1 Seal face

2 Stationary seat

3, 3a, 3b O-Ring

4 Spring

5 Collar

6 Driver

6a Set screw



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