Labels:book | dialog box | hakham | mountain | poster | sky | web site | window OCR: Two Types of Flush alves cont. 2.Piston types: 15-125 psi range of operation Discharge varies 60% over pressure range Piston travel is controlled by a fixed diameter hole Piston type valves depend on fixed diameter hole drilled through the piston through which water flows to time progress as descends to the closed position in the valve cylinder Because such pilot holes not Fex contract or expand the discharge of piston type valves more predictable and consistent. Piston valves are growing in popularity because their discharge curves can be easily modified within the tolerances of the requirements to help match the needs of certain bowls Prev Next flex
