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I'm very confused with what I've read so far about the "bench set" of a valve actuator.
The case I'm trying to analyze is an "air to close" globe valve with the main flow helping to open the valve. The bench set specified in the tag is 5-19psi and a stroke of 60mm, but with 19psi it only moves to 45mm. If I loosen the tension of the spring I can make it reach 60mm with 19psi applied but the valve starts to close with less than 5psi.
The question is, should I care about the bench set if I'll use a smart positioner with the valve? Does the bench set need to be corrected?
Who determines the seating force exerted on the shutter of the valve when a valve positioner is used?
In the tag of a valve I find
Range 7-28 PSI. Is this range the spring range?
Stroke 60mm.
I'm sorry if I'm all messed up, I'm new to the field.
Thanks in advance.
The case I'm trying to analyze is an "air to close" globe valve with the main flow helping to open the valve. The bench set specified in the tag is 5-19psi and a stroke of 60mm, but with 19psi it only moves to 45mm. If I loosen the tension of the spring I can make it reach 60mm with 19psi applied but the valve starts to close with less than 5psi.
The question is, should I care about the bench set if I'll use a smart positioner with the valve? Does the bench set need to be corrected?
Who determines the seating force exerted on the shutter of the valve when a valve positioner is used?
In the tag of a valve I find
Range 7-28 PSI. Is this range the spring range?
Stroke 60mm.
I'm sorry if I'm all messed up, I'm new to the field.
Thanks in advance.