Safety valve should note the following:

(1) there is gas in the container when liquid two-phase material safety valve should be installed in the gas phase portion.
(2) Aluminum safety gas valve for venting flammable liquid outlet valve of the tank should be connected to the accident. When the discharge of the material is a high temperature fuel, its receiving container should have the appropriate protective equipment.
(3) general safety valve may be vented, the vent should be above the fire site operator 1 meter (m) or more and not toward 15 meters (m) or less, emitting sparks and high temperature equipment location. Indoor equipment, safety containers should lead roof vent and the roof above two meters (m) or more.
(4) When the inlet oven non safety valves has cut off valve, cut off valve should be in a normally open state, and to be seals, to avoid mistakes.