What should be considered when installing valves on acid-resistant pumps?

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As is well known, in practical applications involving chemical pumps resistant to acids and alkalis, different valves must be installed depending on the operating conditions, in order to control flow rates and the operation of the pumps. When using acid-resistant pumps, it is common to install stop valves, gate valves, and check valves. So, do you know what considerations should be taken into account when installing valves on commonly used acid-resistant pumps? First, before installing the valve, the inside of the pipeline should be cleaned thoroughly to prevent iron oxide flakes, weld slag, hard particles, or other foreign objects from scratching the valve’s sealing surface. At the same time, carefully check and verify the model specifications of the valves, as well as ensure that they are closed tightly. For valves with a directional orientation, pay attention to the installation direction; installing them in the wrong way will not work ； Due to the asymmetry of the valve chamber of the stop valve, after installation, the fluid flows from below upward through the valve opening. Similarly, gate valves should not be installed in the reverse direction, as this will cause the medium to remain in the valve chamber for an extended period, leading to corrosion of the valve stem. Gate valves with visible stems should not be installed underground to prevent rusting of the stem. Check valves come in two types: lift-type and swing-type. Lift check valves can only be installed horizontally, and for swing check valves, it is necessary to ensure that their pivot pins are installed horizontally. Swing check valves can be used in horizontal and vertical pipes. It should generally be installed in a closed position. When installing or replacing heavy valves, the lifting latch should not be tied to the handwheel or valve stem, but rather to the valve body or flange, in order to avoid damaging components such as the handwheel or valve stem. When installing a pressure reducing valve, shut-off valves and pressure gauges should be installed before and after it, with a safety valve placed behind the valve. Similarly, when installing a stop valve on an acid-resistant pump, since the inlet and outlet are not symmetrical, the fluid should flow through the valve from bottom to top during installation; that is, with the inlet at the lower level and the outlet at the higher level. This makes it easier to open the valve and reduces the risk of leakage from the packing. It truly serves to cut off the flow, regulate pressure, and control the flow rate.