note: types and specifications of safety devices need to be calculated and selected according to the specific working conditions of the protected equipments and systems before quotations.
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a48ytype are used for the equipment and pipeline of the with steam and air etc medium what the working temperature are less than 350℃.a44y type are used for the equipment and pipeline of the with air and petroleum gas medium what the working temperature ate less than 300℃,take for extra pressure protection devices.
flange connecting dimensionsof comply with standard series first of jb/t-94 when the pressure less than 6.4mpa,comply with standard series two of jb/t-94 when more than 6.4mpa.
main parts and materials
main external dimensions