Accession Number : AD0475769

Title :   TEST AND EVALUATION OF THE MODIFIED OCD BLAST CLOSURE VALVES.

Descriptive Note : Technical note,

Corporate Author : NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA

Personal Author(s) : Andon, Jerar

Report Date : NOV 1965

Pagination or Media Count : 34

Abstract : Eight OCD blast closure valves were tested and evaluated by the U. S. Naval Civil Engineering Laboratory. Three sizes of valves were included -- 600 cfm, 1,200 cfm, and 2,500 cfm. The valves are designed to be closed by blast actuation and/or pneumatically by air cylinders. The tests performed included closure force determinations, pneumatic operation of triggered valves, air flow characteristics, strength of latch mechanism under negative pressure, air blast performance, and reliability tests after exposure to the weather. The valves performed satisfactorily except during the air blast tests. There was a thread failure of the stud holding the valve disk to the valve stem at shock pressures above 4 psi. This failure could be remedied by increasing the shear area of the threads subjected to impact loading. (Author)

Descriptors :   *SAFETY VALVES, VENTILATION DUCTS, CIVIL DEFENSE, BLAST, AIRBURST, PRESSURE, PNEUMATIC EQUIPMENT, PERFORMANCE(ENGINEERING), GAS FLOW, SCREW THREADS, FAILURE(MECHANICS), VENTILATION DUCTS, SAFETY EQUIPMENT.

Subject Categories : Air Condition, Heating, Lighting & Ventilating
      Pumps, Filters, Pipes, Tubing, Fittings & Vlvs

Distribution Statement : APPROVED FOR PUBLIC RELEASE