Equal Percent characteristics.
The change of flow resulting from a fixed increment of valve travel is directly proportional to the flow immediately before the change took place.
The change in flow resulting from a fixed increment of valve travel is constant throughout the whole stroke.
- Use Equal Percent if in doubt.
- Use Linear for level control.
- Use Equal Percent for pressure control.
- Use Linear when the pressure drop across the valve is a large proportion of the total pressure drop.