"Product description" 

1. the working parameters (Operationg Conditions), temperature (Temperatrue):-20 ° c to+120 ° c pressure (Pressure): 1.0MPa speed (Speed): = 15m/s 2 material (Materials) Static (Stationary Ring): U2,Q2,V1,Q11 rings (Rotary Ring): B,A,Q1,,Q2