4221 PTFE GRAPHITE WITH ARAMID ZEBRA PACKING
MK4221 is blended and braided with 1126Y and 3000Y by special process...
January 01, 1970
The base material and process are the same as MK8000, supplemented by a silicone rubber material as an elastomer at the center. The product has better compression compensation performance. It is suitable for pumps, valves and kettles with higher linear speed and higher pressure.