Flanges may be made by sections; joints shall be beveled and field welded; bolt holes of two connecting flanges must be drilled together.
法兰允许按箱体分段制作固焊；接头处打坡口，工地拼接；法兰板连接孔须两两配钻制孔。
This check valve is used in systems that utilize glass pipe and installs between connecting flanges where a gasket would normally be located.
这种止回阀应用于玻璃管线系统中，安装在两个装有垫片的连接法兰中间。
When installation, note flow direction of media of valve body. When connecting two flanges, add sealing mat. Then lock the bolt evenly.
安装时请注意阀体上标注介质流向，两法兰连接时必需加密封垫片，然后均匀锁紧螺栓。
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