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高压容器(320～700公斤/厘米~2)顶盖处的双锥密封装置用铝垫(如附图),是保证容器密封性的重要零件,每只铝垫仅能使用一次,在容器的每次检修拆装或水压试验中都需配换新的,耗用量比较大。铝垫直径约600～1000毫米、厚0.8～1.2毫米,成截锥形,材料牌号为 A0、A1或 A2。为了保证锥面的均匀压紧和密封,铝垫的成形必须与双锥密封环的锥面相符,不得有翘曲不正等缺陷;硬度应在 H_B15～30以内,强度不应超出5公斤/毫米~2。在高压容器制造中,它是作为一个紧密零件处理的。
High pressure container (320 ~ 700 kg / cm ~ 2) double cone at the top cover with aluminum gasket (Figure) is to ensure that the sealing of the container is an important part of each aluminum pad can only be used once in the container Each maintenance disassembly or hydrostatic test needs to be replaced with a new, more consumption. Aluminum pad diameter of about 600 ~ 1000 mm, thickness 0.8 ~ 1.2 mm, into a truncated cone, material grade A0, A1 or A2. In order to assure uniform pressing and sealing of the conical surface, the forming of the aluminum mat must conform to the conical surface of the double-cone sealing ring without any defect such as warping; the hardness should be within H_B15 ~ 30 and the strength should not exceed 5 kg / mm ~ 2. It is handled as a tight part in the manufacture of high pressure vessels.