I've entered a minor loss coefficient for an isolation valve but the calculated minor loss in the associated pipe is zero.
As of version 10.00.00.50, headloss resulting from a minor loss coefficient on an isolation valve is included in the "Headloss (Friction)" result field in the associated pipe. This is noted in the Description field seen at the bottom of the Property Grid when selecting the "Headloss (Minor)" or "Headloss (Friction)" property of a pipe.
How does the diameter of an isolation valve effect the calculated results?
Change the diameter of all isolation valve to match the diameter of its referenced pipe