In the process of gas line installation, pressure reducer is to be used in the instrument, its role is to adjust, the inlet pressure will be reduced to a certain need for the export pressure, and rely on the medium’s own energy, so that the export pressure is automatically maintained at a stable valve. Its differential pressure is a certain limit, then the pressure difference of the pressure reducer is too large should be how to solve it, the following Wofei gas line installation manufacturers will be introduced to you.
Pressure reducers are rated for leakage at different pressures. General leakage will not exceed 3%, if the pressure difference between the pressure reducer is too large this will result in the pilot valve is automatically top open state, can not ensure that the back end of the pressure stability and accurate control. When this situation occurs, the back-end pressure will lead to the pilot valve diaphragm and the corresponding action of the adjusting spring to frequent automatic corrections, resulting in the pilot valve must be adjusted too often, so the pilot valve is particularly easy to be worn out.
Then how to solve it such as working conditions in the normal flow rate of 3000kg / h, the inlet pressure of 15BarG, set the pressure of 3BarG, then solve the problem with the following scheme: differential pressure with two pressure reducing valves in series with the pressure reducing station. The first pressure reducing valve will be DN40, set pressure is set to 8bar, from 15 to 8bar, the flow rate is 3300kg/h, the second pressure reducing valve will be DN50, set to 3bar, the pressure will be reduced from 8 to 3bar, the flow rate is 3030kg/h.
Each pressure reducer from the back end of the feedback conduit, copper pipe, the distance to 15 times the diameter of the pipe or 1 metre is appropriate, the pressure gauge is installed in the conduit at the back end of the spacing between the two pressure reducers at least 30 times the diameter of the pipe or more. If the installation location is not enough to require the distance between the two pressure reducing valves, each pressure reducing valve upstream and downstream are required to install a separate shut-off valve. If the above two situations occur at the same time, both large flow changes, and large differential pressure, then the series-parallel combination of pressure reducing station.
Post time: Apr-28-2024