The so-called high temperature ball valve, that is, in the role of preload and fluid pressure, the valve seat and ball pressure, so that the valve seat sealing surface deformation and reach the seal. The sealing effect of the valve seat depends on the action of the fluid pressure and the preload, and can compensate the degree of roundness and roughness of the sphere. Therefore, the valve seat and the ball must have a large enough seal pressure.
High temperature ball valve in the high temperature ball valve is a common kind of ball valve, sub floating high temperature hard seal ball valve and fixed high temperature hard seal ball valve.
A floating high temperature hard seal ball valve referred to as types of Q341H hard seal ball valve, the highest temperature capability to 450 DEG, its hardness coefficient is 55-60. The structure design of Q341H seal valve for single seat sealing seal valve. Body material for cast steel (WCB), the ball is 304 (spray welding), the sealing material for the hard alloy. The factory uses one side sealing structure: one side with graphite seal, the other side of the valve seat and the ball to the other side of the top, so that the valve opening and closing force is light, but also very good sealing performance. So the benefits of the product are: wear resistant, high temperature resistance, light switch, long life.
Second, fixed temperature hard seal ball valve referred to as types of Q347H hard seal ball valve, the highest temperature capability to 450 DEG, hardness can reach 65-70. On both sides of the ball valve seat with elastic spring to hold the center on both sides of the valve seat has the sealing function. The structure design of the fixed hard sealing ball valve is one side seal, the sealing material is made of hard alloy, and the ball is spray welding. Such a relatively high coefficient of hardness. Between the valve seat and valve with graphite seal, so the temperature to 450 degrees. Q347Y hard sealing fixed ball valve benefits are: good sealing performance, high temperature resistance, wear resistance, easy to open and close, long life.
