A11 type internal thread spring micro-open closed safety valve is suitable for equipment and pipelines with air, nitrogen, ammonia and other media whose working temperature is below 200 degrees, as an overpressure protection device.

A11Y-160/320/420, A11Y-160/A11Y-320/A11Y-420, standard specification DN15, this model is a threaded micro-open spring safety valve, which is mostly used on multi-stage air compressors. It is a high-pressure valve. Thread, internal thread for export.

Common models are A11Y-160 safety valve, A11W-16P spring micro-opening stainless steel safety valve, A11Y series internal thread spring micro-opening closed safety valve (safety valve for ammonia), A11Y-160 safety valve for ammonia, A11Y-160C Threaded spring micro-open closed safety valve, A11Y-160P spring micro-open closed safety valve, A11Y-320 ammonia safety valve, A11Y-320C internal thread spring micro-open closed safety valve, A11Y-320P spring micro-open closed safety valve Valves, A11Y-420 ammonia safety valve, A11Y-420C internal threaded spring micro-opening closed safety valve, A11Y-420P stainless steel spring micro-opening closed safety valve.