The importance of the right to determine valve size

in general, to determine valve size is the benchmark standard fluid flow thermodynamic law. Application of this law by the Industrial Valves function and type of the severe situation and condition influence. Simple - open Partition valve closed 100% expected by logistics has no obvious pressure drop. Because they are in addition to close the valve does not control traffic. The other - - In terms of throttling operation is expected to open in a - - Location have through put and produce a certain pressure drop. Because of this problem to determine valve size almost always point to the throttle valve.

open - for manual operation Shut off valve, hope that we can often through all logistics. If the valve internal flow channel or closed element size is less than the upstream line, logistics will since then points later by throttling. These lead to the valve pressure drop or by less traffic, lost - open The main purpose of the valve. If the open - Pass partition valve size is greater than the upper line, the installation cost is more expensive ( Because of increasing costs) 。 The larger Industrial Valves itself also increase the cost. The other - For throttling lang, the intention is to produce pressure drop and reduce the traffic, so it can have a straight by the much smaller than the upstream the hatch of the seats. After selected valve determined by the size of the valve flow is science. If the valve size is too small, the largest collapsed across the valve will be limited and I will affect the function of the system. If the throttle valve size is too large, the user must be installed under ream out additional cost of the valve. Other are the main disadvantages of the whole flow control are completed on schedule in the first half, means that the location of the small changes will result in a change to the flow of large. In addition because adjustment occur in the first half of the schedule and when operating close to the seat adjustment components flow control is difficult. When produce the hope, the output of the flow characteristics and maximum flow throttling tube is the ideal state of using the full range of travel.

seldom determined to throttle valve size is too small, because users there are many safety factors in the operating conditions. A lot of the size of the throttle valve is actually too big. These things happen because the user to provide a set of operating conditions is often an operating conditions ( Temperature, pressure, flow rate, etc. ) 。 Then factory formula in determining the size of the inside and their safety factors. Feeding door factory to do this is to avoid too small errors. For it, user's understanding of size is too small is smaller than the size is too large. Although there is no meaning, but a size too large valve can still operate.

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