The pulley of the crown block is forged welding pulley and conforms to API Spec 8C PSL1; the pulley rope groove is subjected to quenching treatment, with the advantages of abrasion resistance and long service life.
Ambient temperature: 0 ℃ ~ + 55 ℃; -20 ℃ ~ + 55 ℃; ~ 45 ℃ ~ + 55 ℃.
1. Outer diameter of pulley (mm): Φ875; 2. Diameter of suitable wire rope (mm): Φ26;
3. Weight (kg): 159.5.
API Spec 8C-2012
18 months after delivery or one year after use.