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What are the English equivalents of BTO, RTO, ETO, BTC, RTC, and etc. for valves?

2022-10-14View Original

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I often see abbreviations and don’t know what they stand for. Does anyone know?
Reply #22022-10-14
I found it online by myself. BTO = Break to open (air stroke) RTO = Running to open (air stroke) ETO = End to open (air stroke) BTC = Break to close (spring stroke) RTC = Running to close (spring stroke) ETC = End to close (spring stroke) MAST = Max stem torque

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