Brass ball valves cock evolved from its opening and closing parts as a sphere, the use of the sphere around the stem axis 90o to achieve the purpose of opening and closing.
Ball valve has the advantages of simple structure, convenient repair, seals are generally activities, the removal of the replacement is more convenient.
The fluid resistance of brass ball valve is small, full diameter ball valve basically no flow resistance.
Brass ball valve has the advantages of simple structure, small volume, light weight.
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