B5N

Mechanical seals for pumps – Pusher seals

Single seal, For stepped shafts, Balanced, Independent of direction of rotation, Super-Sinus-spring or multiple springs rotating, Integrated pumping device available (H7F, H75F), Variant with seat cooling available (H75G115)

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 up to 22 mm: ± 1.0 mm
d1 24 up to 58 mm: ± 1.5 mm
d1 from 60 mm: ± 2.0 mm

Seal face:

Silicon carbide (Q1, Q2), Carbon graphite antimony impregnated (A), Aluminium oxide (V), CrMo cast 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 made of S

EN 12756

Petrochemical industry, Chemical industry, Power plant technology, Pulp and paper industry, Hot water applications, Light hydrocarbons, Process industry, Oil and gas industry, Refining technology, Food and beverage industry, Boiler feed pumps, Process pumps