Pressure regulator with piston technology. Complies with the international standard ISO 2503. Supplied with additional devices that increase its durability, safety and ease of use and improve its identification. Metal piston to prolong the life of the regulator. Built-in safety valve with indirect relief to limit the danger caused by high pressure in case of valve malfunction. Full ABS gauge protection with UL 94-HB fire-resistant rating, with distinctive gas colors for better protection and easy identification. The regulator valve body is made entirely of brass for increased resistance to high pressures and high temperatures. 100% of the regulator tested.