400Nm Ball Valve DC24V 9.5kgCompact Actuator

Features

• Quarter turn operation with mechanical limits
• Rugged IP67 watertight, robust die cast aluminum enclosure/100% test under water
• Two auxiliary limit switches to confirm valve position
• Visual valve position indicator/flat or convex
• Manual override/handwheel optional
• PTC electronic heating component optional for anti-condensation
• Thermal overload protection heavy duty motor with PTC overheating protector
• Self-locking worm gear makes actuator stays in its last position when power lose
• Over torque protector is optional for actuators torque larger than 100Nm
• Local emergency power off button optional
• CSA certified per UL standard/CE marked

Description

DCL’s common-series electric actuators are typically used to operate quarter-turn devices such as butterfly valves, ball valves, dampers, or swinging arms. When a continuous power signal is applied, the motor drives a fully metal gearbox whose final stage is a worm-gear set; the output shaft turns 90°, and internal cams actuate limit switches to stop the motor automatically at the end of travel. When a reversing continuous signal is applied, the motor rotates in the opposite direction to return the output to its original position.

All DCL actuators employ a specially formulated copper-alloy (bronze) worm wheel — cast as a monolithic unit, not merely surface-plated. This significantly enhances the gear’s strength, wear resistance, and overall durability.

In typical electric actuators, the most vulnerable component is the final-stage worm gear or spur gear, because it sits closest to the output and therefore endures the greatest torque and friction. In other words, the design and material of the worm gear critically determine the actuator’s service life.

DCL improves longevity in two ways:

• Large-radius (long-arm) worm wheel design — by increasing the effective radius, for a given torque the radial force on the gear teeth is reduced, thereby lowering stress per tooth and reducing wear and fatigue.

• Use of a full bronze (copper-alloy) worm wheel, not merely a plated one — this eliminates the risk of plating wear or flaking. The bronze alloy offers excellent wear resistance, good conformability under sliding contact, and stable frictional behavior over a long service life.

As a result, DCL’s combination of a large-diameter, full-bronze worm wheel — mated to a properly hardened and precision-treated worm shaft — delivers reliable, durable, low-noise transmission with significantly extended lifespan compared to actuators using plated or undersized gears.

Specification