Will the pump steam flushing become "water flushing" have any serious consequences?
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This post was last published by HLBO on 2023-9-2 17:29 There are many twin-screw pumps using PLAN62 seal flushing at the editing site. The temperature of the pump body is about 100 to 130 degrees Celsius during operation. Because it is at the end of the steam pipe network and the steam supply to the main device must be ensured, the steam in the pipe network in this area is often disabled. The operators often forget to drain the condensed water in the steam pipeline before starting the pump. As a result, the steam flushing of the pump often turns into "water flushing". Is there any harm? In addition, will the strength of the pump casing change if the condensed water of about 50 degrees Celsius has been sprinkled on the pump casing at about 100 degrees Celsius?
Changing the pump steam flushing to water flushing may have the following serious consequences:: 1. Thermal stress caused by temperature difference: Due to the large temperature difference between steam and water, when the pump is suddenly impacted by water at high temperature, it will cause instantaneous thermal expansion and contraction of the pump material and produce thermal stress, which will cause damage to the pump. 2. Lubrication problem: Steam has good lubrication properties, but water does not. When the pump is operated under water flushing, problems such as friction, wear and jamming are prone to occur. 3. Sealing problem: Steam flushing usually uses seal cooling, while water flushing may cause overheating or damage to the sealing part, further affecting the normal operation of the pump. As for condensate water spilled on the pump casing, condensate water at 50 degrees Celsius will not directly cause a change in the strength of the casing of the pump casing at about 100 degrees Celsius. However, it should be noted that condensate water acting on the pump casing for a long time may cause corrosion, rust and other problems on the surface of the casing, affecting the appearance and service life of the pump. Therefore, it is recommended to take measures to prevent condensation water from dripping on the pump casing for a long time. .
Received, thank you, it is indeed similar to the situation at the scene:handshake
I would like to ask the teacher, which one will cause greater damage to the seal if steam flushing is changed to water flushing or if the water is stopped directly without flushing?
Disabling flushing will cause serious damage to the seal and affect the service life.