1. The nominal pressure standard of domestic valves is mainly Mpa is the valve pressure unit, general general valve is divided into 1.0Mpa/1.6Mpa/2.5Mpa/4.0Mpa/6.4Mpa/10.0Mpa/16.0Mpa/32.0Mpa. pressure
2. American standard valve nominal pressure standard to pound Class: General normal specification use the following grade 150BL/300BL/400BL/600BL/900BL/1500BL/2500BL etc.
3. Other valve standards: marine valves, Japanese standard valves, German standard valves, etc.
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