Gearbox

Corrosion
Resistant

Leak Tight
Sealing

Automated
Operation

Low Maintenance
Long Life

ALIS Valves is an Industrial Valve Gearbox Manufacturer & Supplier in India, offering mechanical gear operators designed to facilitate the manual opening and closing of valves requiring higher operating torque. Equipped with a handwheel and reduction gear mechanism, an industrial valve gearbox enables smooth and controlled valve operation with reduced manual effort. It is commonly used with butterfly valves and other compatible quarter-turn valves in industrial applications.

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Product Specifications and Overview

A valve gearbox is a mechanical operating device that transmits handwheel rotation to the valve stem through a gear reduction mechanism. It increases the available output torque and provides controlled operation, particularly for larger valves or applications where direct manual operation is difficult.

Worm gear operators are commonly used with butterfly valves and compatible quarter-turn ball valves. The gearbox is selected according to the valve’s required operating torque, mounting interface, rotation direction and operating conditions.

Operating Mechanism

Gear Reduction

Gear Type

Worm Gear, depending on model

Output

Rotary

Mounting Standard

EN ISO 5211, if applicable

Housing Material

Cast Iron / Ductile Iron, as per model

Protection Rating

IP rating to be confirmed from datasheet

Gear Material

Steel / Alloy Steel, as per design

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Industries Served

Cement

Engineered valve solutions tailored for critical Cement operating processes.

Chemical

Engineered valve solutions tailored for critical Chemical operating processes.

Data centres

Engineered valve solutions tailored for critical Data centres operating processes.

Fertilizer

Engineered valve solutions tailored for critical Fertilizer operating processes.

Applications

Ammonia

Industrial Valves for Ammonia Applications Industrial valves used in ammonia systems are selected according…

CO₂

High-performance flow automation engineered for CO₂ operations.

Compressed Air

High-performance flow automation engineered for Compressed Air operations.

Cryogenic

High-performance flow automation engineered for Cryogenic operations.

Frequently Ask Questions

How is the correct gearbox size selected for a valve?

Select the gearbox based on the valve's required operating torque, including applicable safety margin, differential pressure and service conditions. Verify the gearbox's rated output torque against the valve manufacturer's requirements.

What is the difference between a gearbox and a direct lever?

A direct lever applies force directly to the valve shaft, while a gearbox uses mechanical reduction to increase output torque and provide controlled rotation.

What causes a gearbox to become difficult to operate?

Possible causes include insufficient lubrication, worn gears, corrosion, excessive valve torque or shaft misalignment. Inspect the gearbox and valve according to the manufacturer's maintenance instructions.

What maintenance is required for a valve gearbox?

Inspect the housing, handwheel, mounting bolts, seals and operating movement. Check lubrication and gear wear according to the manufacturer's recommended maintenance schedule.

What is the purpose of the gear reduction mechanism?

It reduces the input speed and increases the available output torque, allowing the operator to turn the valve with less manual effort.

Can one gearbox be used for different valve sizes?

Only when its torque capacity, mounting arrangement and output interface are suitable for each valve. A common gearbox should not be assumed compatible with every size.

Does a worm gearbox automatically prevent back-driving?

Not always. Self-locking behaviour depends on the worm geometry, gear ratio, friction, lubrication and loading conditions. Confirm the manufacturer's specifications rather than assuming the gearbox is self-locking.