O Ring Single Mechanical Seal (BH7N) for Borgmann

mechancial seals.pump seal,BH7N 
Alternative to:
for BORGMANN H7N
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)
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)
Operating range (see note on page 1)
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 … 22 mm: ±1.0 mm
d1 24 … 58 mm: ±1.5 mm
d1 from 60 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
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

Product variants
H75
Shaft diameter: d1 = 28 … 200 mm (1.10" … 7.87")
As H7N, but with multiple springs in sleeves (Item no. 1.5)
Axial movement: ±2 … 4 mm, dependent on diameter.
H76
Shaft diameter: d1 = 14 … 100 mm (0.55" … 3.94")
Dimensions, items and descriptions as for H7N, but with
special single spring (Item no. 1.5) for compensating large
axial movements (±4 mm).
H7F
Shaft diameter: d1 = max. 100 mm (3.94")
Dimensions, items and descriptions as for H7N, but with
single spring and pumping screw. Dependent on direction
of rotation! (Viscosity ≤ ISO VG10).
H75F
Shaft diameter: d1 = 28 … 200 mm (1.10" … 7.87")
Dimensions, items and descriptions as for H7N, but
with multiple springs and pumping screw. Dependent on
direction of rotation! (Viscosity ≤ ISO VG10).



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