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1. API Spec 11E pumping unit 2.Conventional beam pumping unit 3. simple, stable, convenient, long service life pumping unit
Characteristics:
1. "H" section steel structure, high strength and nice load bearing capacity.
2 .Middle width roller center bearing, strong endurance. Self-aligning bearings are adopted in equalizer beam bearing and crank pin bearing, reducing installationerrors and the vibration when pumping unit is operating.
3. Hanging structure of the horsehead is “self-abdicating” mechanism , facilitating wellhead operations.
Gear reducer adopts herringbone involute or double circular toothed gear, high precision, nice load bearing capacity, and long service life.
4. Brake adopts internal expanding or external structure . The brake has safety devices, which can brake quickly, safe and reliable.
5. Lubrication grease is supplied by central lubrication system, reducing manual maintenance.
6. The unit has comprehensive safety protection, the ladder and all moving parts are equipped with safety guard and safety fences.
| Model | Rated polished rod load | Stroke | Rated torque of reducer |
| (lbs) | (in) | (in.lbs) | |
| C-912D-470-240 | 47,000 | 240, 211, 181 | 912,000 |
| C-912D-427-216 | 42,700 | 216, 185, 155 | 912,000 |
| C-912D-427-192 | 42,700 | 192, 165, 138 | 912,000 |
| C-912D-305-192 | 30,500 | 192, 165, 138 | 912,000 |
| C-912D-365-168 | 36,500 | 168, 144, 121 | 912,000 |
| C-912D-305-168 | 30,500 | 168, 144, 121 | 912,000 |
| C-912D-427-144 | 42,700 | 144, 123, 102 | 912,000 |
| C-640D-305-192 | 30,500 | 192, 165, 138 | 640,000 |
| C-640D-305-168 | 30,500 | 168, 144, 121 | 640,000 |
| C-640D-365-144 | 36,500 | 144, 123, 102 | 640,000 |
| C-640D-305-144 | 30,500 | 144, 123, 102 | 640,000 |
| C-640D-256-144 | 25,600 | 144, 123, 102 | 640,000 |
| C-640D-305-120 | 30,500 | 120, 102, 84 | 640,000 |
| C-456D-305-168 | 30,500 | 168, 144, 121 | 456,000 |
| C-456D-305-144 | 30,500 | 144, 123, 102 | 456,000 |
| C-456D-256-144 | 25,600 | 144, 123, 102 | 456,000 |
| C-456D-365-120 | 36,500 | 120, 102, 84 | 456,000 |
| C-456D-305-120 | 30,500 | 120, 102, 84 | 456,000 |
| C-456D-256-120 | 25,600 | 120, 102, 84 | 456,000 |
| C-320D-256-144 | 25,600 | 144, 123, 102 | 320,000 |
| C-320D-256-120 | 25,600 | 120, 102, 84 | 320,000 |
| C-320D-213-120 | 21,300 | 120, 102, 84 | 320,000 |
| C-320D-305-100 | 30,500 | 100, 85, 70 | 320,000 |
| C-320D-256-100 | 25,600 | 100, 85, 70 | 320,000 |
| C-320D-213-86 | 21,300 | 86, 71, 56 | 320,000 |
| C-228D-213-120 | 21,300 | 120, 102, 84 | 228,000 |
| C-228D-173-100 | 17,300 | 100, 86, 72 | 228,000 |
| C-228D-246-86 | 24,600 | 86, 71, 56 | 228,000 |
| C-228D-213-86 | 21,300 | 86, 71, 56 | 228,000 |
| C-228D-200-74 | 20,000 | 74, 64, 54 | 228,000 |
| C-228D-173-74 | 17,300 | 74, 64, 54 | 228,000 |
| C-160D-173-86 | 17,300 | 86, 74, 62 | 160,000 |
| C-160D-200-74 | 20,000 | 74, 64, 54 | 160,000 |
| C-160D-173-74 | 17,300 | 74, 64, 54 | 160,000 |
| C-160D-143-74 | 14,300 | 74, 64, 54 | 160,000 |
| C-160D-173-64 | 17,300 | 64, 54, 44 | 160,000 |
| C-114D-119-86 | 11,900 | 86, 72, 59 | 114,000 |
| C-114D-143-74 | 14,300 | 74, 62, 51 | 114,000 |
| C-114D-173-64 | 17,300 | 64, 54, 44 | 114,000 |
| C-l 14D-143-64 | 14,300 | 64, 52, 40 | 114,000 |
| C-114D-133-54 | 13,300 | 54, 45, 36 | 114,000 |
| C-80D-119-64 | 11,900 | 64, 53, 42 | 80,000 |
| C-80D-133-54 | 13,300 | 54, 45, 36 | 80,000 |
| C-80D-119-54 | 11,900 | 54, 45, 36 | 80,000 |
| C-80D-133-48 | 13,300 | 48, 40, 32 | 80,000 |
| C-80D-109-48 | 10,900 | 48, 37, 25 | 80,000 |
| C-57D-76-54 | 7,600 | 54, 41, 28 | 57,000 |
| C-57D-109-48 | 10,900 | 48, 37, 25 | 57,000 |
| C-57D-95-48 | 9,500 | 48, 37, 25 | 57,000 |
| C-57D-89-42 | 8,900 | 42, 33, 23 | 57,000 |
| C-57D-76-42 | 7,600 | 42, 33, 23 | 57,000 |
API Conventional Beam Pumping Unit