our Mechanical seal model 58U can Replace  AES SEAL M03S, BURGMANN BT-C5.KU, JOHNCRANE 58U, and MTU DR3-S, which is widely used for industrial pumps.  

58UD- two 58U seal back to back arrangement for Houttuin/Colfax twin screw pumps. 

Type58U is unbalanced mechanical seal and equipped with oring seat; 
Type 58B is balanced mechanical seal and equipped with oring seat too. 

Type 59U is unbalanced mechanical seal and equipped with wedge ring and has PTFE secondary ring. 
Type 59B is balanced mechanical seal and equipped with wedge ring and has PTFE secondary ring too. 

58U pictures: 




58B pictures:


59U pictures: 


59B pictures: