Puyang Zhongshi Group manfacture elevators.
DDZ series elevators are a center latch elevator with 18 degree taper shoulder, applied in handling the drilling pipe and drilling tools, etc.
The load ranges of this kind of elevators from 100 tons to 750 tons.
Their size is from 2.3/8" to 6.5/8".
Technical specifications of DDZ elevators:
| Model | Size(in) | Rated Capacity (short tons) | Remark |
| DDZ -100 | 2.3/8-5 | 100 | MG |
| DDZ -150 | 2.3/8-5.1/2 | 150 | RG |
| DDZ -250 | 2.3/8-5.1/2 | 250 | MGG |
| DDZ -350 | 3.1/2-5.7/8 | 350 | GG |
| DDZ -350TD | 3.1/2-5.7/8 | 350 | For Top Drive |
| DDZ -500 | 3.1/2-6.5/8 | 500 | HGG |
| DDZ -500TD | 3.1/2-6.5/8 | 500 | For Top Drive |
| DDZ -750 | 4-6.5/8 | 750 | For Top Drive |
