Common Failure Modes in Globe Valve Gearboxes and How to Prevent Them

The globe valves are workhorses in industrial pipelines. They handle flow regulation and shut-off duties across industries like power generation, oil and gas, and water treatment.

But even the toughest globe valve is only as reliable as its gearbox. When that gearbox fails, the entire valve becomes useless. It can lead to unplanned downtime, costly repairs, or worse, a safety incident. So, ensure you connect with globe valve gearbox manufacturers to make a wiser investment.

Here's a practical look at what actually goes wrong inside globe valve gearboxes and what you can do to stop it before it stops you.

Moisture and corrosion

High-humidity environments and outdoor installations can be brutal on gearboxes. Water sneaks in through damaged seals or vent plugs, mixes with lubricant, and results in corrosion on internal components. Rust on bearing races and gear surfaces accelerates wear dramatically.

Prevention: 

Specify gearboxes with IP67 or higher ingress protection ratings for exposed locations during teh purchase from a valve gearbox manufacturer. Replace breather plugs with desiccant-type vents and inspect all gaskets and seals during every maintenance cycle.

Damaged or worn worm gears

At the heart of a global valve gearbox is a worm gear. However, repeated cycling under load causes wear and tear in gear teeth when the valve is parted under high torque. The backlash increases, and direct control becomes impossible once the teeth start wearing unevenly.

Prevention: 

Use high-pressure or food-grade grease rated for your operating temperature. Inspect gear teeth during scheduled shutdowns and replace the worm set before wear becomes critical rather than after it causes a failure.

Bearing failure

Bearings handle the radial and axial loads that come with every valve operation. When lubrication degrades, or contamination finds its way into the housing, bearings run hot, develop pitting, and eventually seize. The warning signs are usually audible, like a low grinding when the handwheel turns, which is a clear signal that something is wrong inside.

Prevention: 

Sticking to a fixed re-greasing schedule rather than waiting for visible dryness is what separates plants that catch bearing problems early from those that deal with seized gearboxes.

Conclusion

The failure of a globe valve gearbox doesn't happen suddenly, but there are many factors responsible for the majority of failures in a globe valve gearbox. Industries can source high-quality gearboxes from Viral Industries, a trusted manufacturer of globe valve gearboxes that supplies custom and high-quality products to clients across the USA, Europe, Canada, and the Gulf. Their gearboxes are engineered to handle the demanding conditions where most failures begin.