API 682
First Time in India
Manufactured by Leak-Proof Only
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  Quality Assurance
  Boiler Feed Water Seal
Single Acting, Dependent of Direction of Rotation
  Mechanical Seal Series 800HB2/CG
  Standard Style:
  Face Materials:
Carbon / Silicon Carbide

Metal Parts:
SS 316, SS 304

Secondary Seal:

Boiler feed water Pumps
HSD Pumps
Booster Pumps
Drip Pumps
Condensate Pumps
Fuel Oil Pumps
  Seal Characteristics:
Single acting
Inside mounted
Dependent of direction of rotation
  Operating Limits:
  Shaft Diameter d : 65 ... 150 mm
  Pressure p : 50 ... 140 bar (max)
  Temperature t : – 20 ... +250O C (API plan 23)
  Velocity v : < 50 m/sec
  Download brochure >
  This is a unique seal developed to meet stringent technical requirements of Boiler feed water pumps. Rotating
mating ring design makes it suitable for high speed application & avoids critical requirments of stuffing box
face squareness. Both the faces are having strong positive drive & locking arrangment which make seal very strong
and sturdy.
Thermodynamic circulation grooves inscribed on the rotating faces boost the cooling of the sliding faces by
reducing the coefficient of friction and protecting the seal against thermal over loading. Increased collent flow
effected by the pumping screws & the fluid guiding channel combine to force the cold water into the gap between
seal ring and mating ring, blowing out gas bubbles and dirt praticles and picking up frictional heat.
In view of risk of dynamic distortion because of high sliding velocity of over 25 m/sec the springs are located
in the stationary part. For this seal 20,000 hours of continuous running may be viewed as normal. Attainment of
over 79000 hours is possible.
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