Grundfos UP Two-Way Zone Valves for hydronic heating applications incorporate a 24-VAC, normally closed, motorized actuator that is removable with the push of a built-in button for easier installation and servicing. With its compact and installer-friendly design, the in-line actuator features a high gear ratio that eliminates gear-tooth stress, water hammer and valve “bouncing” for virtually silent operation.
Available with or without a sealed auxiliary end switch, the actuator has an enlarged, coil-spring gear transmission that can deliver 20 psi (pounds per square inch) of close-off force at a flow rate of 7.5 Cv. The valve body itself is made of durable forged brass, rated at 300 psi, with a two-way flow and a high Cv rating. All components are corrosion-resistant.
November 23, 2010