Safety valve outlet should be no resistance, to avoid the back-pressure phenomenon, if install drainage pipe, its diameter should be larger than the outlet diameter, valve exclude port should be noted antifreezing, to fitting flammable or toxic, poisonous media containers, discharge tubes should be straight-through to a safe place outdoors or proper treatment facilities, discharge tubes are not allowed to install any valves.
Between the Pressure-bearing equipments and safety valves should not install any valves relief valve between the equipment and shall not be fitted with any valve, right Sheng flammable, explosive, toxic or viscous medium container, for ease of replacement, cleaning and closing valves can be installed, its structure and diameter size should not hinder Safety valve for normal operation. Normal operation, the cut-off valves must be fully open and add seals.

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