A44Y-16/25/40C type spring full-open closed safety valve with spanner is suitable for equipment and pipelines of air, steam, petroleum and other media whose working temperature is ≤300℃. Type A44Y-16/25/40P/R with spanner The spring full-open closed safety valve is suitable for equipment with corrosive media at working temperature ≤200℃, as an overpressure protection device.

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