Development of Variable Operation, Pressure-type Quench Relief Valve for Superconducting Magnet Systems

A variable operation, pressure-type quench relief valve (VQRV) has been developed by the High Energy Accelerator Research Organization (KEK) for superconducting magnet systems. It is based on the Kautzky valve, featuring a long extension structure, a high radiation-proof gas seal with Poly-Ether-Eth...

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Bibliographic Details
Published inTeion kōgaku Vol. 45; no. 4; p. 199
Main Authors KIMURA, Nobuhiro, OHHATA, Hirokatsu, OKAMURA, Takahiro, MAKIDA, Yasuhiro, YOSHIDA, Hideaki
Format Journal Article
LanguageEnglish
Published Tokyo Japan Science and Technology Agency 01.04.2010
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Summary:A variable operation, pressure-type quench relief valve (VQRV) has been developed by the High Energy Accelerator Research Organization (KEK) for superconducting magnet systems. It is based on the Kautzky valve, featuring a long extension structure, a high radiation-proof gas seal with Poly-Ether-Ether-Ketone (PEEK) and an actuator driven by differential pressure between a process value and a set value. The VQRV was tested under a high radiation environment up to 2.5 MGy. The gas leak rate and heat load were measured at 4.2 K. A measured heat loss of less than 1.5 W and a seat leakage rate of 4.5 × 10-7 kg/sec are low enough for cryogenic system operation in the J-PARC neutrino beam line.The design and test results of the VQRV are described in this technical report.
ISSN:0389-2441
1880-0408