The gasket cavity should face out to the adjoining flange.
垫圈的空穴应该面向临近法兰的外面。
The urethane liner extends over the flange face to serve as the valve's flange gasket.
这种氨基甲酸乙酯延展覆盖到法兰表面，起到阀门法兰衬垫的作用。
CAUTION: Do not use any sharp tools such as a crowbar or screwdriver on the rubber during installation. Sharp instruments can damage the flange face and cause possible leakage.
警告：在安装期间，不要采用任何尖锐的工具，如：撬棍或螺丝刀等。尖锐的工具可能会损伤法兰面，从而可能导致泄露。
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