【Q&A Question 246】2017.09.04
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【Q&A Question 246】September 4, 2017: How to switch the filters at the new hydrogen engine oil station, and what are the consequences of doing it incorrectly? (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) The answers to the daily questions change, and today’s answers are shown in subsequent questions. For management purposes, if you need to view content from a few days ago, please go through the summary post below. 2017 Q&A Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html (Source: Haichuan Chemical Industry Forum)
Gas stations have two filters in two different locations; just turn them to the designated positions
First, exhaust the air, then make the switch, and finally clean the original filter element. A poor switch can easily lead to the oil pump being partially emptied or to inadequate lubrication
Open the connecting valve between the filters, fill the spare filter with oil, and vent the air from the top until no oil more comes out. Turn the three-way valve between the two filters to switch the filter to spare mode, then close the connecting valve. During this switching process, the connecting valve should remain open to prevent the three-way valve from getting stuck and causing a stop in the supply of lubricating oil. An improper switch operation can cause a temporary interruption in the lubricant flow, and may even lead to a shutdown.
Slightly open the inlet and outlet valves of the backup filter to allow air to escape; once all the air has been removed, fully open these valves. Then close the valves of the filter that is currently in use – failing to do so properly can trigger a two-out-of-three interlock for the lubricating oil system
Slightly open the inlet and outlet valves of the backup filter to allow air to escape; once all the air has been removed, fully open these valves. Then close the valves of the filter that is currently in use – failing to do so properly can trigger a two-out-of-three interlock for the lubricating oil system
Slightly open the inlet and outlet valves of the backup filter to allow air to escape; once all the air has been removed, fully open these valves. Then close the valves of the filter that is currently in use – failing to do so properly can trigger a two-out-of-three interlock for the lubricating oil system
1) Inspect the spare filter before cutting over. 2) Close the drain valve and open the vent valve. 3) Slowly open the oil filling connection valve and fill the spare filter with oil at a low flow rate, paying attention to the sight glass of the vent valve. 4) When oil can be seen flowing through the sight glass, close the vent valve and the oil filling connection valve. 5) Slowly turn the switching handle to the spare filter, paying attention to changes in oil pressure and ensuring that the valve is in place. 6) Slowly drain the oil from the filter that is no longer in use and monitor the oil pressure before proceeding with maintenance. Pay special attention to changes in oil pressure during switching; the switch valve must be moved into position.
Switching steps: 1) Inspect the backup filter before switching； 2) Close the drain valve and open the vent valve ； 3) Slowly open the oil filling connection valve to fill the spare filter with oil at a low flow rate, and pay attention to observing the sight glass of the exhaust valve ； 4) When oil is flowing through the sight glass, close the vent valve and the oil filling connection valve ； 5) Slowly turn the switch handle to the backup filter, paying attention to changes in oil pressure and the proper positioning of the valve ； 6) Slowly drain the oil from the shut-down filter and observe the oil pressure before handing it over for maintenance. Pay special attention to changes in oil pressure during switching; the switch valve must be moved into position.
First, check the spare filter, close the drain valve, open the vent valve, and slowly open the oil filling connection valve to fill the spare filter with oil, paying attention to the sight glass of the drain valve. When there is flow through the sight glass, close the vent valve and the oil filling connection valve, and slowly turn the switch handle to the spare filter. If there is gas inside during the switching process, it will cause the oil pressure to drop, leading to the automatic switching of the oil pump
Open the connecting valve between the filters, fill the spare filter with oil, and vent the air from the top until no oil more comes out. Turn the three-way valve between the two filters to switch the filter to spare mode, then close the connecting valve. During this switching process, the connecting valve should remain open to prevent the three-way valve from getting stuck and causing a stop in the supply of lubricating oil. An improper switch operation can cause a temporary interruption in the lubricant flow, and may even lead to a shutdown.