Overview:
Single end surface
Fixed spin direction
Non-balanced 
Single spring structure    
The 120 series is from the M37 series Evolved to conform to DIN 24960 Allow it to be simple in structure and easy to install, but use should pay attention to the rotating side. It is suitable for chemical pumps, sewage pumps and submersible pumps.general corrosive medium.       
Operating parameters: 
Pressure :≤1 MPa    
Temperature :-20-150 degrees Celsius    
Line speed:    <=15M/S    
Sealed face: graphite, silicon carbide, tungsten carbide        
Auxiliary Sealing: Acrylonitrile Binder, Fluorogel, Tetrafluoride        
Metal components: stainless steel