Pressure-vacuum valves.

  1. Law
  2. CFR 46
  3. Shipping
  4. Coast Guard, Department of Homeland Security
  5. Certain Bulk Dangerous Cargoes
  6. Ships Carrying Bulk Liquid, Liquefied Gas, or Compressed Gas Hazardous Materials
  7. Design and Equipment
  8. Cargo Venting Systems
  9. Pressure-vacuum valves.

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§ 153.368 Pressure-vacuum valves.

(a) The pressure side of a required pressure-vacuum relief valve must begin to open only at a pressure exceeding 3.5 kPa gauge (approx. 0.5 psig).

(b) A pressure-vacuum relief valve must meet the requirements of Subpart 162.017 of this chapter.


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