1 Safety valves on equipment or pipe should be installed upright, but for safety valves installed on liquid pipes, heat exchangers, containers, etc., where the pressure may be raised due to thermal expansion after the valve is closed, installation. 2 The safety valve should be installed as close as possible to the equipment or piping being protected. If not close to the arrangement, it is required that the pressure drop across the pipe between the outlet of the equipment being protected and the inlet of the safety valve does not exceed 3% of the pressure rating of the valve. 3 Safety valve should not be installed in the dead end of the long horizontal pipe to prevent accumulation of solid or liquid materials at the dead end, so as not to affect the normal operation of the safety valve. 4 safety valve should be installed in easy to repair and adjustment of the place, there must be enough work space around. 5 For large-diameter safety valve, the safety valve should be considered in the layout after the demolition of lifting the possibility, if necessary, set the boom. 6 safety valve inlet pipe should be used long radius elbow. 7 Safety valve outlet pipe should be designed to consider back pressure does not exceed the pressure relief valve certain value, for example: For ordinary spring safety valve, the back pressure does not exceed 10% of the pressure relief valve. 8 The discharge valve of the safety valve into the closed system shall be miter-connected to the top of the pressure relief manifold at a flow rate of 45 degrees to prevent the condensate from flowing back into the branch manifold and reduce the back pressure of the relief valve. 9 Safety valve outlet pipe can not appear "bag", safety valve outlet pipe longer, should set a certain slope (except for dry gas system). 10 Safety valve discharge pipe to the atmosphere, the outlet can not be oriented equipment, platforms, ladders, cables and so on. 11 Wet gas pressure relief system should have a "bag-shaped" effluent inside the discharge pipe. The installation height of the safety valve should be higher than that of the pressure relief system. If the safety valve outlet is lower than the pressure relief manifold or drain pipe to raise the access manifold, the drip pack should be accessible at a low point. 12 When the safety valve outlet pipe with cut-off valve should be used single gate valve, and the lead seal open, the stem should be installed horizontally, so as to prevent the stem of the valve plate connected pin corrosion or loose, the valve plate down. When the safety valve with bypass valve, the valve should be sealed off. Search Keyword: More Valve Technical Articles
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