API standard conventional beam pumping unit reducer use chevron double circular arc gear-rack, having strong carrying capacity and long serve life. Using box-type or I beam structure, the products have characteristics of high strength, good rigidity and stability. The horsehead can be turned upwards, racking and side-tracking. Using external-hold type or internal-swelling type structure and insurance device, the break can be flexibly operated, and reliable on safety. The pumping unit takes tie-down block type. This kind of fixing method is safe and convenient, giving the machine reasonable structure, stable working status, and low noise. With this structure, the machine is easy to be operated and maintained.
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