The production of SB stuffing boxes ordered by our customer has been completed. The stuffing boxes are regular type and are suitable for 1-1/4 and 1-1/8 polished rods with 2 "LP male bottom thread. At present, the batch of SB type stuffing boxes have completed the inspection, packaging and other rel

1. The stuffing box is installed on the wellhead to seal polished rod to prevent crude oil spill well. 2.1. Chemical CompositionThe chemical composition of stuffing boxes shall be any composition of AISI recommended series materials listed below which meet the mechanical property requirements. The c