1127 built-in Kevlar PTFE packing
Each PTFE graphite yarn is covered with aramid fiber in its center

MK4080 is braided with 4080Y. It’s flexible and stable, has low friction coefficient and excellent compression resistance. Applicable for all chemical compounds except alkali metal and gaseous fluorine ,reciprocating pumps, rotary pump, piston, stem, expansion joint at high leaner speed.