Mechanical Seal With Bearing 1.Item no:HFJ318H(special for heat pump) 2 ... 200 3.min qty:1set 4.payment:T/T Mechanical Seal With Bearing:1.Item no: HFJ318H(special for heat pump)2 ... rotary ring of this type cartridge mechanical seals are designed with a pump ring,this design can improve the speed of ... high-temperature medium,overheated oil pump,heating circulation pump Mechanical Seal With Bearing HFJ318H