(1) It should have sufficient strength and good sealing performance.
(2) Require reliable operation and long service life. The valve, plunger, pump barrel, etc. shall be strictly required from the aspects of structure, material, processing quality and heat treatment process to improve the wear resistance and corrosion resistance, so as to reduce the non production time of Pumpjack and reduce the production cost.
(3) To have high productivity and pump efficiency.
(4) Easy installation, repair, and use are required.