Conform to API Spec. 11E
Conventional beam pumping unit has advantages of simple structure,reliable performance,easy to install and maintain.

Characteristics of this kind of pumping unit
1. The structure is simple and reasonable,it works smoothly with lower noise,easy to install and maintain.
2.Walking beam is a box or welded H steel beam with high strength,good eigidity and heavy capacity.
3.Gear reducer uses herringbone involutes or double circular-arc gears with high bearing capacity and long working life.
4.Horse head with swinging device move side or upwards is flesible and convenient for well workover.
5.Central bearing and equalizer bearing feature heavy duty and reliable seal by adopting medium and wide series roller bearing.
6.Self-aligning bearing is used on equalizer to reduce mounting error and operating vibration.
7. Internal expansion or external contracting brake with safety device is easy,quick and effective for operating

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