HM58U/HM59U mechanical seal, for industrial pump, replace the mechanical of Burgmann and John Crane.Hightech mechanical seal factoryis the advanced designer & manufacturer of mechanical seal, the range involves in: industrial pump mechanical seal, mixer and agitator seal, cartridge seal, metal bellows seal, auto cooling pump seal and auto air-condition compressor lip seal. Hightech products can replace the mechanical seals produced by John Crane and Burgmann and be widely used in petroleum, chemistry, refinery, paper making, pharmacy, power and auto industry.