DeCluchable Type Worm Gearbox
Welcome to Viral Industries, one of the best De-clutchable type worm gearbox manufacturer & supplier in USA, Europe, Canada and Gulf. Our manual override gearbox is designed to provide maximum efficiency and durability for a wide range of industrial applications. Our de-clutchable type worm gearboxes are available in a variety of sizes and ratios to suit your specific application. They are also designed to handle high torque loads and are suitable for use in harsh environments.
Furthermore, our De-clutchable type worm gearbox (manual override gearbox) can deliver torque ranging between 600 Nm – 1,00,000 Nm (516 lbf-ft – 73,756 lbf-ft).
At Viral Industries, we are committed to providing our customers with the highest quality products and services. Contact us today to learn more about our gearbox and how we can help you with your industrial application.
Note: Our manufacturing unit is only in India, but we export De-clutchable type worm gearbox to the USA, Europe, Canada, and Gulf.
Models of DeCluchable Type Worm Gearbox
Our De-Clutchable Type Worm Gearbox models, VWM manual, and VWM with spur gearbox deliver torque from 600 Nm to 100,000 Nm with instant manual override, IP65–IP68 protection, and ISO 5211 compliance for fail-safe control in oil, gas, water, and power applications.
De-Cluchable Type Worm Gearbox (VWM Models without Spur Gearbox from VWM-06 to VWM-40)
Engineered for fail-safe operation, our VWM series enables instant switch from actuator to hand-wheel during power failure, delivering 600-4,000 Nm torque with low effort. Ideal for critical water, power & process systems requiring uninterrupted valve control.
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| Viral Ind. Model No. | Output torque Capacity | Ratio | M A ( ±10 % ) | Hand-wheel Diameter | Hand-wheel Effort | |||
|---|---|---|---|---|---|---|---|---|
| Nm. | lbf-ft | mm | Inch | lbs | Kilogram | |||
| VWM-05 | 600 | 516 | 40 | 14 | 250 | 10 | 90.0 | 40.8 |
| VWM-15 | 1,500 | 1106 | 42 | 16 | 400 | 16 | 105.4 | 47.8 |
| VWM-25 | 2,500 | 1844 | 52 | 20 | 500 | 20 | 112.5 | 51.0 |
| VWM-40 | 4,000 | 2950 | 55 | 21 | 600 | 24 | 142.8 | 64.8 |
De-Cluchable Type Worm Gearbox (VWM Models with Spur Gearbox from VWM-60 to VWM-1000)
Engineered for high-torque control in modulating valve applications, our VWM spur gearbox series delivers 6,000–100,000 Nm torque with ultra-low hand-wheel effort, ideal for water, power & process industries needing precise manual modulation.
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| Viral Ind. Model No. | Output torque Capacity | Ratio | M A ( ±10 % ) | Hand-wheel Diameter | Hand-wheel Effort | |||
|---|---|---|---|---|---|---|---|---|
| Nm. | lbf-ft | mm | Inch | lbs | Kilogram | |||
| VWM-60 | 6,000 | 4425 | 194 | 62 | 600 | 24 | 72.6 | 32.9 |
| VWM-80 | 8,000 | 5900 | 220 | 70 | 600 | 24 | 85.7 | 38.9 |
| VWM-100 | 10,000 | 7376 | 300 | 95 | 600 | 24 | 78.9 | 35.8 |
| VWM-150 | 15,000 | 11063 | 449 | 143 | 700 | 28 | 67.4 | 30.6 |
| VWM-250 | 25,000 | 18439 | 605 | 190 | 700 | 28 | 84.6 | 38.4 |
| VWM-350 | 35,000 | 25815 | 992 | 320 | 700 | 28 | 70.3 | 31.9 |
| VWM-600 | 60,000 | 44254 | 1200 | 380 | 750 | 30 | 94.7 | 43.0 |
| VWM-1000 | 1,00,000 | 73756 | 1768 | 569 | 1000 | 40 | 79.1 | 35.9 |
De-Cluchable Type Worm Gearbox (Manual Override Gearbox) For Both Side Flange or Top Mounted Actuator
Engineered for fail-safe operation, our declutchable gearbox allows instant switch from actuator to hand-wheel during power failure, ensuring uninterrupted valve control in critical water, power & process systems with flexible mounting options.
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Valve Mounting Detail
Ensure seamless integration, our control valve gearboxes support ISO 5211 flanges (F07 to F60) and spindle diameters from 35mm to 185mm, designed for a perfect fit with globe, gate & check valves across global industrial applications.
| Viral Ind. Model No. | Both Side Mounting Flange(ISO 5211) | Max. Spindle Diameter (mm) |
|---|---|---|
| VWM-05 | F10, F07 | 35 |
| VWM-15 | F14, F12 | 50 |
| VWM-25 | F16, F14 | 55 |
| VWM-40 | F25, F16 | 70 |
| VWM-60 | F25, F16 | 80 |
| VWM-80 | F25, F16 | 80 |
| VWM-100 | F30, F25 | 85 |
| VWM-150 | F35, F30 | 100 |
| VWM-250 | F35, F30 | 110 |
| VWM-350 | F48, F40, F35 | 120 |
| VWM-600 | F48, F40 | 155 |
| VWM-1000 | F60, F48 | 185 |
Features:
- Clockwise rotation of input will give clockwise rotation of output.
- Self-Locking gearbox.
- Bearings supported assembly.
- Suitable for Actuator operation.
- Grease Lubricant Gearbox.
- Higher ratio options to reduce effort.
- Locking Arrangement.
- Available for marine application.
- Available for horizontal hand-wheel orientation.
Bore Options for Worm-Wheel Quadrant:
- Round Shape with multiple key-way
- Square Shape
- Hexagon Shape
Temperature Limit:
- Normal application -20˚C To 120˚C
- High temperature application up to 150˚C
- Low temperature application up to -50˚C
Material Options for Worm-Wheel:
- Phosphorus Bronze (PB-2)
Enclosure:
- IP-65 ,IP-67, IP-68
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Why Choose Us?
At Viral Industries, we are driven by innovation, integrity, and engineering excellence. Our expertise in valve gearbox manufacturing allows us to deliver reliable solutions that adapt to your industry’s toughest challenges - ensuring performance, precision, and long-term trust.
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Flexibility
We understand that every industry has unique requirements. That’s why our manufacturing process is designed for customization and adaptability - ensuring that every gearbox we produce meets your exact operational needs.
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Quality
Quality is at the core of everything we do. From raw material selection to final inspection, we follow stringent quality standards to deliver gearboxes that perform flawlessly, even under the most demanding conditions.
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Sustainability
We are committed to sustainable manufacturing practices that minimize waste and energy consumption. Our goal is to build products that not only perform efficiently but also contribute to a greener industrial future.
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Transparency
Honesty and clarity define our partnerships. We maintain open communication throughout every project - from design to delivery - ensuring you always know what to expect, with no hidden surprises.
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Custom Gearbox Solutions. Trusted Worldwide
As a leading valve gearbox manufacturer, we deliver high-performance, custom gearbox solutions for global industrial applications. We design and build durable valve gearboxes that ensure smooth, reliable operation in challenging industrial environments across the globe.
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100+
Satisficed Clients
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21000sq. ft.
area of manufacturing unit
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300Nm to 250000Nm
We manufacture sizes of gearbox
We export in20+Countries
Our Clients
Get the Answers You Need to Move Forward.
Get clear, concise answers to the most common questions about valve gearboxes. Make informed decisions with expert insights and practical guidance.
A de-clutchable manual override gearbox allows instant switching from automated actuator control to manual hand-wheel operation during power failure, maintenance, or emergencies. This fail-safe feature ensures uninterrupted valve control in critical applications like water treatment, oil & gas, and power plants, where downtime is not an option.
Our VWM series delivers 600 Nm to 100,000 Nm (516–73,756 lbf-ft) of output torque. Models VWM-05 to VWM-40 are optimized for standard manual override, while VWM-60 to VWM-1000 include spur gear reduction for ultra-high torque and minimal hand-wheel effort in large valves.
Yes. Our design supports dual mounting configurations, either side flange (ISO 5211) or top-mounted actuators, ensuring flexible integration into existing automated systems without redesign. This makes retrofitting or new installations seamless across global industrial setups.
Absolutely. All models come with IP65, IP67, or IP68-rated enclosures, offering full protection against dust, water immersion, and corrosion. They operate reliably from –50°C to +150°C, making them ideal for marine, desert, chemical, and buried applications.
The de-clutching system uses a simple, robust lever or knob to disengage the actuator input and engage the hand-wheel, no tools required. Built with self-locking worm gears, phosphorus bronze worm wheels, and grease-lubricated bearings, it ensures smooth, reliable operation even after long periods of inactivity.