1.The design and manufacture of crown block of series is in accordance with API Spec 4F and 8A Standards; having the right to use API monogram.
2. Be in accordance with the requirement of SY/T5527 in the “Main Hoisting Equipment of Oil Drilling Rig” Standard.
3. The sheave rope groove is through quenched processing, with the features of wear-resistance and long-life.
4. Equip with rope blocking bar or rope jamming groove, preventing the steel rope from groove-hopping or dropping.
5. Equip with bump-proof cushion devices.
6. Equip with crane boom used for maintaining the sheave block.
7. Equip with bailing sheave and auxiliary sheave block.
8. The sheaves of crown block and the ones of its assorted traveling block can be replaceable.