Fixed and floating ball valve is the biggest difference is that the ball in the middle of the fixation, fixation of seal damage, stationary to enhance the service life of the ball valve, fixed ball valve is higher than the service life of floating ball valve, because the floating ball valve floating ball is inside the cavity of the rotation, will cause the sealing floating sinking, ball valve at turning points, there is no strong point, will have damage on both sides of the seal.
After the ball as long as you use, can create 38 tube fitting some different degree of loss of pressure, when the ball has a strong point, will not cause the loss of pressure or the face of the pressure loss of the received will be very small, so the life of the fixed ball valve is higher than the floating type, some relatively high switch frequency occasions use fixed ball valve will be better.
Ball valve sealing
Ball valve has a health level of ball valve, ball valve, eccentric half v-shaped ball valve, PVC ball valve and so on
These are the rules according to different occasions of different valves
Health level of ball valve manufacturing process is usually welding, no casting, because the domestic health level of ball valve pressure ball valve pressure is commonly in 6 kg, is relatively thin, it is welded tubes, confined to reach (all the valve pressure means the thickness of the wall thickness to achieve a certain), only the body is thick, it is under pressure to reach to the standard
Half of an eccentric valve and V type ball valve is similar to that of valve core is only half, is also fixed ball valve, is mainly applied to solid particles, all solid ball valve with eccentric ball valve, many cement plants and use this.
V-shaped ball valve and ball valve is a one-way brass tube fitting eccentric, only in the direction of a flow, not a two-way flow, because it is by the single seal ball, be opposite stamping seal will not tight, only flow in one direction with pressure sealing under the condition of strictly.
PVC valve seal only EPDM (EPDM), FPM (fluorine rubber)
Chosen in air tightness higher pipeline ball valve or vacuum ball valve vacuum butterfly valve is a special fund is special, if choose the vacuum butterfly valve is a one-way seal of large diameter, the choice of small vacuum ball valve, is more than 50 large caliber, 50 below is small, specific also see their own system and budget cost, high budget cost as far as possible choose ball valve.
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