Manual double plate BOP mainly for the middle test drilling, production, test and new oil well perforating the underground operations, to prevent well kick or blowout, to ensure safe operation, with reasonable design, compact, light weight, small size, easy operation and maintenance. The main technical parameters: Model: 2SFZ18-35 maximum working pressure: 35MPa flange outer diameter: φ480mm pad ring number: R45 Dimensions: 1240 × 380 × 710mm Quality: 650Kg