Product overview

Jacket type ball valve is widely used in oil and gas pipeline, and oil production, oil refining, petrochemical, chemical, chemical fiber, metallurgy, electric power, nuclear power, food and paper and other devices.Remove simple rapid jacket type ball valve in the pipeline and convenient maintenance.When the valve is in the pipeline failure needs to be repaired, don't need to remove the valve from the line, just pull down the flange bolts and nuts, the bonnet and stem assembly together removed from the valve body, and then remove the ball and seat assembly.Online repair ball and seat.This saves time of maintenance, will produce to minimize the loss.

Jacket type ball valve is divided into floating ball valve and the fixed ball ball valve

A floating ball valve nominal size of less than DN200. A compression spring is exerted on the sphere. The compression spring is exerted on the ball to exert a preload, so that the valve seat sealing surface is in close contact with any case, and the sealing performance is good.. Valve contact with the valve body of the wedge angle of 10 degrees, the valve seat can be self - locking, in the direction of the pipe, when the valve seat is more pressure, the valve seat will not produce any displacement. Therefore, this structure of the valve both the characteristics of valve and ball valve. In the maintenance inspection found that the valve body and valve seat leakage easily, if the spring preload, bound to increase the valve closing torque. In order not to increase the valve closing torque, the valve seat sealing surface and a rubber O - ring, to solve the valve seat sealing surface leakage problem.

Jacket type fixed ball valve fault is spring pre-tightening force can't regulate and control, and assembly of large amount of spring compression, assembly difficulty.In order to solve this problem, the spring material selection ANSI 302 instead of 304.ANSI 302 spring stiffness is good, its corrosion resistance close to 304.And adjusting nut, in addition, increased the spring seat on the seat cylindrical and spring seat thread cutting, respectively, with the adjusting nut to spring pressure inside the spring seat, the seat assembly into the body.Because the spring has been compressed before installing a sphere, so very convenient installation sphere.When the ball after the assembly, the adjusting nut to exit the spring seat, spring smaller prestressing force on a sphere at this time.If you want to increase the pre-tightening force, can be used to adjust the adjusting nut.