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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a41h type are used for the equipment and pipeline of the petroleum gas, air, water etc medium what the working temperature are less th an300℃.a41y-p/r type are used forthe equipment and pipeline of the quality with corrode medium what the working the working temperature are less than 200℃.take for extra pressure device.
flange con nesting dime nsions of comply with standard series one of jb/t……94。
main parts and materials
main external dimensions