Backup systems are only as reliable as the components behind them, which is why knowing how to store and maintain backup gate valves correctly matters more than many people realise. These valves often sit unused for long periods, yet they’re expected to work instantly in critical situations. Without proper storage and routine care, hidden issues like corrosion, seized stems or degraded seals can quietly develop, increasing the risk of failure when the valve is finally called into service. This guide explains the practical steps that help protect valve condition, extend service life and ensure dependable performance when it matters most.
Why Proper Storage Is Critical for Backup Valves
Proper storage is essential for valve reliability, especially in emergency systems where backup valves must work instantly. These valves often sit idle for long periods, and poor storage can lead to hidden problems that only appear when the valve is finally needed.
Moisture, humidity and temperature changes can cause corrosion on stems and internal surfaces, while elastomer seals may harden or crack over time. Together, these issues increase friction, reduce sealing performance and raise the risk of emergency backup valve failure. The problem is that this damage isn’t always visible from the outside, so a valve may look fine but fail under pressure.
Storing valves in a clean, dry and stable environment helps prevent these issues. Using protective covers and carrying out basic periodic checks keeps components in good condition and ensures the valve remains ready for service. Done properly, good storage protects system reliability and avoids avoidable failures when it matters most.
Ideal Storage Environment & Preparation
Creating the right storage conditions for valves isn’t just about keeping them out of the way. Good preparation and environment control directly support valve reliability and reduce the risk of emergency backup valve failure when you least expect it. Let’s break down the key elements that make storage effective.
Temperature & Humidity
Valves, and particularly the elastomer seals inside them, are sensitive to temperature and humidity. If conditions swing too far from ideal, seals can age prematurely, harden, crack or lose elasticity, undermining performance when they’re needed most. Seal manufacturers recommend keeping elastomer components in a stable environment where relative humidity stays below around 60–65% and temperatures don’t fluctuate wildly. This helps slow down ageing and preserves seal flexibility over time.
Aim for a controlled range close to 5°C–40°C with humidity kept under 60%. Within this band, elastomer materials age more slowly and aren’t exposed to condensation or drying conditions that could lead to failure. Too much moisture encourages corrosion; too dry and seals can become brittle. Both are risks for backup valves that need to operate instantly in an emergency.
Port Protection
Keeping internal surfaces clean is just as important as controlling the air around the valve. Dust, grit and moisture entering through open connections can damage seating surfaces or create abrasive paths for moving parts. That’s why port protection is essential: always fit tight flange covers (caps) immediately after inspection or maintenance. Secure covers help prevent contaminants from settling inside the valve body and protect precision seating areas from nicks and scratches.
Even during short periods of inactivity, valve ports should remain sealed and clean to reduce the risk of hidden failures caused by surface contamination that only becomes apparent under load.
Material Separation to Prevent Galvanic Corrosion
When storing valves of different materials, take care to prevent unintended chemical interactions. For example, stainless steel and carbon steel stored in direct contact can develop galvanic corrosion if moisture acts as an electrolyte between them. This electrochemical process can accelerate corrosion of the less noble metal, damaging components over time.
To avoid this, always separate dissimilar materials or use non-conductive barriers such as plastic sheets or padded shelving between stainless steel and carbon steel valves. This simple manufacturer insight helps protect both materials and extends storage life without complex treatments.
Correct Valve Positioning
Ensuring the correct positioning of gate valves in storage plays a big role in maintaining valve reliability and reducing the chance of emergency backup valve failure when they’re eventually needed. A couple of simple positioning guidelines can make a big difference to how well a valve holds up over time.
Store Valves Upright
First and foremost, gate valves should always be stored upright with the stem vertical. This mirrors how the valve sits in service and prevents unnecessary mechanical stress on internal components. When stored on their side, the wedge, seats and seals can become distorted under their own weight, which may lead to deformation or sticking. Storing valves vertically helps avoid this stress and keeps sealing surfaces aligned as designed. Industry guidance specifically recommends upright storage to maintain the shape of the seats and seals and protect internal components from warping.
Keeping the stem vertical also makes handling easier and safer, especially for larger valves. It ensures that the heaviest parts of the valve remain supported by a stable base, reducing the risk of accidental knocks or drops during warehouse movement.
Keep the Gate Slightly Open
Next, consider the position of the gate itself. Many manufacturers and storage best practices suggest storing gate valves with the gate slightly open rather than fully closed. Leaving the wedge just off its seat relieves constant compression on the seats and helps prevent the seal rings from sticking to one another over long periods of inactivity. This simple adjustment reduces long-term stress on critical sealing surfaces and makes future operation smoother.
A slightly open position also helps prevent hidden issues that only become evident when a valve is first operated after storage. If a gate remains tightly closed for months or even years, the seating surfaces can set in place and become difficult to move, increasing the risk of failure at a critical moment.
Routine Maintenance Schedule
Keeping backup valves in top condition isn’t just about storage and handling. A well-structured routine maintenance schedule helps maintain valve reliability and reduces the risk of emergency backup valve failure by ensuring components stay mobile and corrosion-free over time. Regular checks catch emerging problems early and keep valves ready to function when needed.
Quarterly: Cycle and Lubricate
Every three months, manually cycle the valve through a full open and close sequence. This simple action prevents the stem from seizing and helps distribute lubricant across moving parts. Without regular cycling, valves can stiffen during long periods of inactivity, making them harder to operate precisely when an emergency occurs. While the exact frequency can vary depending on usage and environment, quarterly cycling is a widely recommended baseline for stored or infrequently operated valves.
As part of this quarterly routine, check for smooth stem movement and apply suitable lubricant where necessary. Proper lubrication reduces friction and helps guard against rust or wear — especially on threads and contact surfaces.
Semi-Annually: Check for Corrosion
At least twice a year, inspect all exposed metal surfaces for signs of rust or corrosion. Even valves kept in controlled environments can be vulnerable to moisture or airborne contaminants, which can compromise metal integrity over time. If you spot surface rust or corrosion, clean it off gently and re-apply an anti-corrosion coating in line with manufacturer recommendations. This proactive step extends component life and avoids degradation that could contribute to unexpected failure.
Regular anti-corrosion care also supports smoother valve operation and reduces the likelihood of components sticking together under load.
Annually: Inspect Rubber Seals
Once a year, perform a visual inspection of rubber and elastomer seals. Over months of storage or low use, seals can harden, crack or lose elasticity due to factors like UV exposure or age. Hardened seals may no longer provide effective sealing, increasing the risk of leaks and reducing the overall effectiveness of the valve in an emergency.
Look for signs of surface cracking, discolouration or loss of flexibility. If seals show significant deterioration, replace them according to the manufacturer’s guidance. Early detection of seal degradation not only helps prevent leaks but also supports confidence in the valve’s ability to operate reliably when it matters most.
3 Common Storage Mistakes That Ruin Valves
Even well-designed valves can fail early if they’re mishandled during storage. Many of the most damaging issues don’t come from obvious neglect, but from everyday practices that seem harmless at the time. Understanding these common mistakes helps protect valve reliability and reduces the risk of emergency backup valve failure later on.
Mistake 1: Lifting by the Handwheel
One of the most frequent handling errors is lifting a valve by its handwheel. While it may look sturdy, the handwheel is not designed to bear the full weight of the valve. Lifting this way can bend the stem, misalign internal components and create hidden mechanical stress that only shows up during operation.
Best practice is to use designated lifting lugs, eyebolts or slings positioned around the valve body. This distributes the load correctly and keeps the stem straight, ensuring the valve will operate smoothly when installed.
Mistake 2: Over-Greasing Internal Cavities
Grease is important for protecting moving parts, but more is not always better. Over-greasing internal cavities can actually do more harm than good. Excess grease can trap moisture, dust and grit inside the valve body, creating a contaminated environment that accelerates wear and corrosion.
Instead, lubrication should be applied sparingly and only to the areas specified by the manufacturer, such as stems or bearings. This keeps parts protected without sealing contaminants inside the valve, which could compromise performance over time.
Mistake 3: Ignoring FIFO Stock Rotation
Valves in storage don’t last forever, especially when elastomer seals are involved. Ignoring a First-In, First-Out (FIFO) rotation system means older valves can sit untouched for years while newer stock is used first. Over time, seals can harden, crack or lose elasticity, even in good storage conditions.
Without FIFO control, it’s easy to install a valve with expired or degraded seals, increasing the risk of leaks or failure under pressure. Clearly labelling storage dates and rotating stock properly helps ensure valves are installed within their recommended shelf life.
Pre-Installation Checklist: Verify Before You Install
This is the step many articles overlook, yet it’s one of the most important for long-term valve reliability. Even a valve that’s been stored correctly can develop issues over time. Before installation, a short but thorough verification helps prevent emergency backup valve failure caused by problems that only appear once the system is live.
Hydrostatic Re-Test for Stored Valves
If a valve has been in storage for more than 12 months, a hydrostatic pressure test should be carried out before installation. Extended storage increases the risk of seal relaxation, internal corrosion or minor damage that isn’t visible from the outside. Re-testing confirms the valve can still hold pressure without leakage.
The test should be performed in line with ISO 5208 requirements to verify seat tightness and pressure integrity. This step provides documented assurance that the valve meets performance expectations and hasn’t degraded while idle. Skipping this check may save time upfront but can lead to costly leaks or shutdowns later.
Visual and Functional Checks
Alongside pressure testing, a careful visual and functional inspection is essential. Start by operating the valve manually to confirm the stem moves smoothly through its full range without binding, stiffness or unusual resistance. Any hesitation can indicate internal corrosion, dried lubricant or early stem damage.
Next, inspect the flange faces closely. They should be clean, flat and free from scratches, dents or corrosion marks that could compromise gasket sealing. Even small imperfections can lead to leaks once the valve is bolted into the line.
Conclusion
In the end, taking the time to store and maintain backup gate valves properly is a practical step that pays off when it matters most. Correct storage, careful handling and routine checks help prevent hidden damage, extend valve service life and reduce the risk of unexpected failure. Backup valves are often overlooked because they’re rarely used, but that’s exactly why proper care is essential. When storage and maintenance are done right, these valves remain reliable, responsive and ready to perform when the system depends on them.