Seal series 800HB2 is a unique seal developed to meet stringent requirements of Boiler Feed Water Pumps. Rotating mating ring design makes it suitable for high-speed applications & avoid critical requirements for stuffing box face squareness. Both the faces are having strong positive drive & locking arrangement which makes a design very sturdy.

Thermodynamic circulating grooves inscribed on the rotating face boost the cooling of the sliding faces by reducing the coefficient of friction and protecting the seal against thermal over loading. Increased coolant flow affected 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 particles and picking up frictional heat.

In view of risk of dynamic distortion because of high sliding velocity of over 25m/s the springs are located in the stationary part. For this seal 20,000 hours of continuous running may be viewed as normal. Attainment of 79,000 hours is possible.