• Environmental Science
  • Published 1986

Quality criteria for water: 1986

@inproceedings{Epa1986QualityCF,
  title={Quality criteria for water: 1986},
  author={U. Epa},
  year={1986}
}
A safety control valve to be disposed on a tank for loading and unloading liquefied gas therefrom. The safety control valve includes a valve body having a valve seat at an end thereof within the tank and a main valve plug cooperating therewith. A pilot valve plug slidably carries the main valve plug. An operator actuates the pilot valve plug to bleed pressure from the tank and permit opening of the main valve plug. The main valve plug will close if there is excess flow above a predetermined… CONTINUE READING

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