The shortcoming of top valve housing for standard type oil well pumpplunger is wear and rupture of oil flow pore wall.
标准型抽油泵柱塞上阀罩的工作缺陷是出油孔壁磨损断裂。
2
The travelling valve of the pump is designed to be closed and opened forcibly, and the pumpplunger adopts equal-diameter bare pipe with a floating structure to prevent gas lock and sand sticking.