Regulators are designed for applications requiring high flow capacity, low droop, high accuracy, and fine adjustment sensitivity. Rolling diaphragm provides greater sensitivity and improved accuracy from a constant effective area. Regulators feature precision-cast aluminum housing; vinyl paint finish resists scratching, weathering, and other physical abuse. Rubberized, soft-seat valve stem provides stability and "forgives" dirt and other foreign matter. An aspirator maintains downstream pressure and compensates for droop when high flow occurs. The gauge port is convenient for installation and can also be used as an additional full-flow outlet.