HB Series Worm Gear Actuators: Precise & Durable Solutions for 90° Rotary Valves

The HB Series is a premium line of worm gear actuators by Nippon Gear, specifically engineered for 90° rotary valves such as butterfly, ball, and plug valves. With its ability to handle extreme torque and maintain low backlash, the HB Series ensures flow control with optimum precision.

Key Highlights of the HB Series

1. Versatile Operation: Manual & Automated

The HB Series allows for effortless manual operation via a handwheel. Furthermore, the units are designed to be readily coupled with electric or pneumatic actuators, making it simple to upgrade to a remote control system without replacing the gearbox.

2. Intelligent Drive & Maximum Force Reduction

• Auxiliary Gearing: Equipped with additional spur gears to significantly reduce the required manual input force. Optional bevel gears allow the input shaft direction to be rotated by 90°, providing flexibility for handwheel installation in confined spaces.

• Premium Materials: Alloy steel worm shafts combined with high-strength bronze worm wheels result in a structure that is compact yet incredibly robust.

3. High Precision – Minimized Vibration

Thanks to high-precision machining, the HB Series effectively eliminates backlash between the worm gear and worm shaft. This prevents valve disc vibration caused by flow turbulence, thereby protecting the valve seals and extending the system’s lifespan.

4. Installation & Maintenance Friendly Design

• Double Bushing Mechanism: Enables technicians to flexibly adjust the keyway position to match the valve shaft perfectly without complex machining.

• ±5° Adjustable Mechanical Stoppers: Allows for on-site fine-tuning of the open/closed limits to ensure a 100% tight seal at both ends of the stroke.

Practical Applications

The HB Series is a trusted choice for high-torque requirements in:

• Water & Wastewater Systems: Operating large-diameter butterfly valves at pumping stations.

• Oil, Gas & Chemicals: Controlling high-pressure ball valves.

• Fire Protection & HVAC: Ensuring reliable operation for central valve manifolds.

HB Series Technical Specifications

With 11 unit sizes, the HB Series covers a massive torque range up to 260,000 N·m:

Why Choose the HB Series?

• Extensive Capacity Range: Suitable for all valve sizes, from small to ultra-large.

• Industrial Durability: Designed for stable operation through thousands of open/close cycles.

• Flexibility: Easy conversion of input shaft orientation and seamless integration with automated control devices.