... Hastelloy c,HastelloyB ,17-7PH 20#alloy nonstandar spring mechanical seal Applicable working condition1,The pressure of sealed chamber: 1. ... advantages1,Imported material is widely used in manufacturing mechanical seals2,Direct factory price3,Professional technical services4,Products ... with much patents5,20 years experience of mechanical seal6,ISO90017,We accept O/A and all ...