Product features：

· Product design and manufacture implement API SPEC 11E specification and China petroleum industry standard CB/T29021, through API and industry certification.

· Based on four-bar linkage beam pumping unit structure, to design the beam bend down, equalizer and tail bearing on the top of the beam, to install the barbell balance device under the tail beam pump.

· Crank balance and beam balance make up compound balance, the counterbalance effect is much better, make the torque of the reducer run smoothly, the total electricity saving rate is 30%.  

· Using the special calculation software to optimize the design of dimension parameter, the motion performance is excellent and the working is stable and reliable. 

· Simple structure, sturdy and durable, convenient maintenance.

· Using the design concept of modularization, high universalizable.

· Suitable the stroke of pumping unit over 3m.