Accession Number:

ADA250035

Title:

Performance Tests of a Fast-Acting Valve for the Driver Tubes of a Large Blast/Thermal Simulator

Descriptive Note:

final rept. Jan 1991-Jan 1992,

Corporate Author:

EG AND G IDAHO INC IDAHO FALLS

Personal Author(s):

Report Date:

1992-05-01

Pagination or Media Count:

69.0

Abstract:

This document describes the testing of a fast-acting throat valve element designed by Eaton Consolidated Controls for use in driver tubes, blast generators of a Large BlastThermal Simulator LBTS. An LBTS is used to simulate decaying blast waves such as are generated by nuclear explosions. The Eaton Throat Valve Element ETVE was tested at the Idaho National Engineering Laboratory INEL to evaluate its performance against the design criteria. The ETVE was mounted at the end of a driver tube and actuated 16 times at 6 different driver pressures ranging from 396 kPa to 12.4 MPa 57.5 psi to 1,800 psi. The valve seals survived successfully all 16 tests with the driver gas at room temperature and maintained an acceptable leak rate throughout the test program. The average valve lag time was determined to vary from 36 to 120 ms however, the valve was found to chatter, going through several up to 20 openingclosing cycles after actuation before settling in the open position. An increase in the pneumatic supply pressure driving the valve showed a minor decrease in the number of chattering cycles. When the valve was actuated with no pressure in the driver tube, no chattering was observed. At the conclusion of the test sequence, the valve seals were inspected and were in good condition. The shock waves appeared to agree with code predictions when the chattering effects were disregarded.

Subject Categories:

  • Machinery and Tools

Distribution Statement:

APPROVED FOR PUBLIC RELEASE