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①②③④⑤⑥⑦⑧ --①②③④⑤⑧⑥⑦ ※3 Spring Nut Key (6TWH04) is required when replacing ⑤, ⑥ and ⑦. Spare PartsDynac ValveDynac Valve is a gas valve that also serves as a "fuse plug."In the event of extremely high temperatures, such as a fire, the packing (② and ⑤ in the figure below) melts to release the gas in the accumulator to the atmosphere when a predetermined temperature (160±20ºC) has been reached or exceeded.By using the valve in combination with a relief valve to prevent pressure build-up on the fluid side, the Dynac Valve can serve as a safety device pursuant to the High Pressure Gas Safety Law, Japan, and Article 6, Paragraph 1, No. 19 of the General High Pressure Gas Safety Regulations.Dynac Valve provided works in three ways: charging, retaining, and venting accumulator nitrogen gas.Compared to traditional gas valves, the Dynac Valve offers excellent air tightness, durability, and resistance to high/low temperatures.Hex.4Thread SizeG1/4G3/8-G1/4G3/8G1/4G3/8--107NumberItemValve Cap with Fuse Packing※1O-ring (AS568009) ※2Dynac Valve Body (Assembled with Top Cap)Packing with Valve Stem ※1Spring Spring NutThere are cases in which another item number O-ring is used if the bladder material of the bladder is not Standard Nitrile Rubber.Spring Nut Key ※3Spring Nut Key (6TWH04) cannot be used for the accumulator manufactured before January, 1992. The spring nut before January, 1992 is 10 mm (hexagon outer nut size).645024106A 645051802A 645025702A 645026400A (color: transparence)645071300A (color: bluish semi-transparence)Item Number(Brass)(Stainless Steel)(Brass)607107009645045500645048200 ※1 Packing deteriorates over years, periodically replacing them is recommended. ※2 The material of above O-ring is Standard Nitrile Rubber. 6TWH04Function of Fuse PlugFunction of Gas Valve

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