N-99 which is NPC’s pure alumina is taken for parts of pump which is a washer and shaft. It has the purity of 99.5%. This products were adopted by many pump maker for long time.
- Chemical resistance—Few impurities, Strong for acid and alkali
- Dimensional accuracy—Grinding an entire surface for the finishing touches
- surface roughness—Shaft（Basically,It’s able to be Ra 0.2-0.3）
—Washer（It’s able to be Ra 0.1-0.2）
- Business results—We are supplying these products for many pump maker over 20 years.