A42Y-C type spring-loaded closed safety relief valve is suitable for working temperature ≤ 300 ℃ air, liquefied petroleum gas, liquids and other media equipment and pipeline.

A42Y-R type and A42Y-P type spring-loaded closed safety relief valve is suitable for working temperature ≤ 200 ℃ corrosive media equipment and pipeline, as overpressure protection device.