Grinnell Fire Triple Duty Valve, Flow Control, Series: TD830, 4 in Nominal Size, Grooved, 640/565 psi, 100/300 deg F, Ductile Iron Body, 4-1/2 in O.D x 15-5/8 in H

The Grinnell® Model TD830 Triple Duty Valve is primarily designed for installation in pump discharge piping where it functions as a spring-loaded silent check valve, flow-control valve, and shut-off valve. The Model TD830 Triple-Duty Valve operates automatically and silently. Line pressure of approximately 1/4 psi will open the disc. The spring closes the disc as the line flow approaches zero in order to prevent flow reversal and water hammer. The flow through the valve can be adjusted from bubble-tight shut-off to full-flow by the acme threaded rising stem. The Model TD830 Triple-Duty Valve can be installed quickly into grooved end piping systems with two Grinnell® couplings.