8.A gas pressure regulating box equipped with an overpressure cut-off valve, the cut-off pressure is set at 1.5 times the output pressure. The box body of the gas pressure regulating box can be made into ordinary type or thermal insulation (heating) type according to the temperament. For dry, water-free qualities (such as natural gas, etc.), you can choose a common box. For gas qualities that contain water and are greatly affected by temperature changes (such as artificial coal gas, liquefied petroleum gas, etc.), you must select an insulated box to ensure the normal gas supply of the pressure regulating system.