Generally, the medium and low pressure shut-off valves are low-in and high-out. When the cut-off, the filler is not subjected to force, reducing the probability of leakage and prolonging the service life.
Generally, the shut-off valve of DNA100 can adopt high-input and low-out; it is difficult to close the valve with low-input and high-pressure under large-caliber and high-pressure conditions. Second, because the valve stem is long-term if it is low-in and high-out under high-pressure and large-diameter conditions. The water pressure is easy to deform and bend, which affects the safety and sealing of the valve. Thirdly, if the height is low, the diameter of the valve stem can be small, which will save the cost for the manufacturer and the user.