往复泵盘根密封盒设计已发展为用于加强与现代化学品有关的保护要求。原来用大麻纤维和牛脂盘根环的调整式单根密封盒已换成自动式三盘根密封盒。该盘根密封盒具有液体或气体喷射循环装置,对盘根进行润滑。 Reciprocating pump packing boxes have been developed to enhance the protection requirements associated with modern chemicals. The original single sealed box with hemp fiber and beef grease packing ring has been replaced with an automatic three-pack sealed box. The packing seal box has a liquid or gas jet circulator to lubricate the packing.