What are the key points for inspecting safety valves, glass plate level gauges, and mechanical vent valves?
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I would like to ask fellow sailors: our workshop requires a special inspection campaign to be carried out in the near future on safety valves, glass plate level gauges, and mechanical vent valves. What aspects should be checked for these safety accessories?
Check the safety valve; basically everything is included there. http://wenku.baidu.com/link?url=VES2s63X8tjAlEYDFkPzeeFbxFxZjPnFhm-up-3Nvi3L74FKDV*GhxL_yymF_UoeVISzombtT5lUeykgPqCEHagKAob_ZoNK4toOYgiojS
This post was last edited by yuchenchf on 2015-7-21 at 15:23. When mechanical breathing valves are in use during winter, when the temperature is below 0°C, they should be inspected at least once a week to prevent the valve disc and seat from sticking together due to freezing and thus losing their functionality. Water droplets that have accumulated on the valve disc and seat should be wiped away; if ice has formed, it must be removed. Regular comprehensive inspections and maintenance of the breathing valves are necessary. For mechanical breathing valves on above-ground tanks and semi-underground tanks, inspections are carried out twice a month in January and April, and twice a month in February and March; for those on oil depots, inspections are conducted once every six months. The main tasks for inspection and maintenance include opening the top cover to check whether the valve disc, valve seat, guide rods, guide holes, springs, etc., inside the breathing valve are rusted or clogged, and to clean them; if necessary, kerosene can be used for cleaning. It is also necessary to check whether the valve disc moves smoothly and without any jamming, as well as to ensure that the sealing surface (the contact surface between the valve disc and the valve seat) is in good condition, repairing it if needed. Since the material of the sealing surface is a colored soft metal, finer grinding agents should be used when grinding it. The sealing mesh on the valve body should also be checked to ensure it is intact and not frozen or blocked; rust and dust on the mesh should be removed to ensure smooth gas flow in and out. Additionally, it is important to check whether the gasket around the bolts is tight, replacing it if necessary, and applying oil to the bolts. Glass level gauge: http://bbs.hcbbs.com/thread-440396-1-1.html
Thank you for your answer! I’ve learned it!