BALL FOR A THERMAL SPRAY COATED BALL VALVE CAPABLE OF MAINTAINING SEALING IN A MUTUAL CONTACT PART BETWEEN A BALL AND A VALVE SEAT

摘要

PURPOSE: A ball for a thermal spray coated ball valve is provided to extend service life by obtaining surface hardness and durability as forming a thermal spray coating layer on the ball surface of a ball valve.;CONSTITUTION: A ball for a thermal spray coated ball valve comprises a valve body, a ball(4), and a pair of valve seats. A passage in which fluid flows is formed inside the valve body. The ball is rotatably coupled in the valve body and controls fluid flow by rotating depending on operation of a handle. A thermal coating layer(9) by plasma spray is formed on a ball surface to increase surface hardness and durability. The valve seats are embedded in the valve body and rotatably support the ball.;COPYRIGHT KIPO 2012