One, American standard lug type hard seal butterfly valve working principle:
D373H lug type hard seal butterfly valve is a disc disc, revolving around the valve shaft to open and close a valve, mainly used for cutting and throttling in the pipeline. The opening and closing member is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening and closing or adjusting. Butterfly valve fully open to fully closed is usually less than 90°.
Two, American standard lug type hard seal butterfly valve product features:
1, reasonable design, compact structure, easy assembly and disassembly, easy maintenance.
2, eccentric structure, reduce the friction of the seal ring, prolong the service life of the valve.
3, completely sealed, zero leakage, can be used for ultra-high vacuum conditions.
4, replace the valve plate seal ring, butterfly plate, rotating shaft and other materials, can be applicable to a variety of media and different temperatures.
Three, the United States standard lug type hard seal butterfly valve standards:
1. Design standard: API609-83
2. Flange connection size: ANSI B16.5
3. Structure length: ANSI B16.10-1992
4, pressure test: API598-82
