Description
Features:
■ Utilize API 6A,6D and NACE MR0175 standard design and manufacture;
■ Seating and sealing face of valve plate heap (spray) are a welded hard alloy;
■ Valve seat and valve plate are sealed, stem seal uses a safe and reliable lip type combination wellhead sealing structure;
■ The switch valve has lowtorque;
■ Inverted stem seal design, packing can be replaced under pressure;
■ Gate structure has a rising stem and a non-rising stem, the opening of the valve is clearly marked; ■ Valve plate structure has integral or expandable forms;
■ The seat structure has floating and fixed forms;
■ Drive has manual, hydraulic and gear transmission forms;
■ Connections have flange thread and clamp.
