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Why do you need to know the spring number(s) for the reverse acting Dia-Flo actuators?

April 26, 2017acting Actuators dia-flo reverse spring

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Why do you need to know the spring number(s) for the reverse acting Dia-Flo actuators?

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All 3200 series (reverse acting) air motors are air to open, spring to close. A spring or set of springs are required to close the valve. In order to provide the correct air motor, spring number(s) must be supplied.