API RM Series Reverse Mark Pumping Unit

Description

API RM Reverse Mark Pumping Unit is similar in appearance to conventional pumping unit. It adopts phased crank, and is widely used as energy efficient pumping unit in rod pumping work. Our product accords with API Spec 11E Specifications for Pumping Units and Chinese petroleum industry standard SY/T5044-2003 and other related standards.

Performance and advantage
> Modularization and virtual manufacturing technology have been adopted in the process of designing. It is similar in appearance and motion characteristics as conventional pumping unit;
> The reducer adopts symmetrical involute gear transmission or double circular arc herringbone gear transmission, with good sealing, low noise, smooth running and reliable durability.
> Phase angle on crank reduces maximum torque peak of gear reducer; increase crank angle between two limit positions to improve dynamic performance, reduce motor power; obvious energy-saving effect;
> The structure is optimized; the parts are of high standardization, universalization, and serialization. Operation Simple, Ease of maintenance and long service life.

Parameter

NO.	Model	rated polished rod capacity (lb)	Stroke (in)	Rated torque of reducer (lbf·in)
1	RM-912D-365-192	36,500	192、158、127	912,000
2	RM-640D-305-168	30,500	168、139、111	640,000
3	RM-640D-256-144	25,600	144、119、96	640,000
4	RM-456D-305-120	30,500	120、100、80	456,000
5	RM-456D-256-120	25,600	120、100、80	456,000
6	RM-320D-256-144	25,600	144、119、96	320,000
7	RM-320D-213-120	21,300	120、100、80	320,000
8	RM-228D-256-100	25,600	100、83、67	228,000
9	RM-228D-173-74	17,300	74、62、51	228,000