... is coated with chorme 3, Sucker rod pump & tubing pump Description and Work Principle:Sucker rod pump is ... through the stationary valve and flow into the tubing.In the down stroke,the traveling valve open ... hole of the extractor, then go into the tubing,Testing:1, Conform to API Spec 11AX2, All ... ground3, The sucker rod pump is consist of tubing and movable plungerTechnical Data: pump bore(mm)barrel ...