The inner liner of the electric ball valve is used to reduce the flushing of the fluid on the inner surface of the pipe and the pressure loss of the fluid, and is mainly used to transport the pipeline of high velocity fluid. When installing the electric ball valve with lining cylinder, the welds welded on the equipment shell or pipeline shall be located upstream of the fluid according to the flow direction of the medium. Do not install it reversely.
The equalizing ring of the electric ball valve is used to strengthen the internal pressure resistance of the wave trough and wave side wall, and to make the "T" section ring with uniform compression displacement of each wave. Another kind of stiffening ring is a circular or toroidal section part used in the U-shaped tube to enhance the pressure resistance at the wave trough.
The ring band of non electric ball valve can be divided into two structural types: integral type and combined type. Integral type: a whole belt material composed of one or more reinforcing layers covered by valves or fluoroplastics. Combined type: It is composed of sealing layer, thermal insulation layer, reinforcing layer and edging. When the system temperature exceeds the heat resistance range of the sealing layer, additional insulation layer shall be added.
The non electric ball valve ring is overlaid with each layer of material, and bonded, stitched or mechanically fastened in the pressing plate area. The non electric ball valve ring belt is not allowed to have braided circumferential joints. The braided longitudinal joints shall be as few as possible. The spacing of longitudinal joints in the same layer shall not be less than 1000mm. The braided longitudinal joints between layers shall be evenly staggered, and the longitudinal joints of the sealing layer shall be welded, buckled or glued with high-temperature glue. The overlapping length of non electric ball valve ring with longitudinal seam shall not be less than 1.3 times of bolt spacing.