Can Office Chairs Be Regassed?
Yes, office chairs can be regassed, but that should only be attempted by professionals.
It is quite dangerous to do so.
A better option is to replace the hydraulic cylinder altogether. Rather than trying to figure out how to refill gas, you should replace it.
When to Replace an Office Chair Hydraulic Cylinder
1. When the Gas Cylinder is Empty:
- When the gas cylinder is empty: You’ll know it’s time to replace your office chair hydraulic cylinder when it starts to feel like you’re sitting lower to the ground. This happens because the gas inside the cylinder starts to leak out over time. To check if your cylinder is empty, unscrew the cap at the top and see if there’s any gas left inside. If not, then it’s time for a new one.
- When the Chair feels Unstable: Another tell-tale sign that it’s time to replace your office chair hydraulic cylinder is if the chair feels unstable. This is usually caused by a worn-out or damaged piston inside the cylinder. If you notice that your chair wobbles or tilts to one side when you sit in it, then it’s definitely time for a new piston.
- When The Chair Doesn’t Recline Properly: Finally, if your office chair doesn’t recline properly anymore, then it’s probably also time to replace its hydraulic cylinder. Over time, the piston inside the cylinder can become stuck in place, preventing the chair from reclining as far as it used to. If you find that your chair doesn’t recline as far back as it used to, then it’s time for a new one.
When the Gas Cylinder is Rusty:
If your office chair gas lift is rusty, it’s time for a replacement. A gas lift is what allows you to adjust the height of your chair. When the gas cylinder is rusty, it can cause the chair to sink suddenly, which can be dangerous. A new gas cylinder will ensure that your chair is safe to use and will last for many years.
When You Notice a Leak:
When you notice a leak, it’s time to replace your office chair’s hydraulic cylinder. A small amount of leakage is normal, but if the number of leakage increases, it can cause the chair to become unstable or even collapse.
If you have an office chair with a gas lift, the most common cause of a leak is a faulty seal. Over time, the seals can degrade and allow gas to escape. This will cause the chair to slowly sink over time.
Another common cause of a leak is a damaged or bent piston rod. This can happen if the chair is dropped or knocked over. If you notice that the rod is bent, it’s important to replace it as soon as possible as it can cause further damage to the chair.
If you’re not sure what’s causing the leak, it’s best to consult with an expert before attempting to repair it yourself.
Replacing an Office Chair Hydraulic Cylinder
Identifying an Office Chair Gas Cylinder Type:
There are a few things you need to know in order to identify an office chair gas cylinder type. The first is the diameter of the gas cylinder. The second is the length of the stroke, which is the distance that the piston can travel up and down inside the cylinder. The third is whether the gas cylinder is self-contained or not.
The diameter of a gas cylinder is measured in millimetres (mm) and is usually between 40 and 70 mm. The length of the stroke is also measured in millimetres (mm) and varies depending on the type of chair.
For example, chairs with shorter strokes typically have a lower seat height, while chairs with longer strokes have a higher seat height.
Self-contained gas cylinders are sealed at both ends and do not require an external air supply. Non-self-contained gas cylinders, on the other hand, do require an external air supply in order to function properly.
Removing the Old Gas Cylinder:
- Remove the gas lift from the chair by unscrewing the retaining ring with a flathead screwdriver.
- With the gas lift removed, unscrew the hydraulic cylinder from the base of the chair.
- Use a plunger to push down on the piston inside the hydraulic cylinder and release any remaining pressure.
- Pull out the old piston and replace it with a new one.
- Screw the hydraulic cylinder back into place and reattach the gas lift.
Installing a new Gas Cylinder:
To install a new gas cylinder, first remove the old one by unscrewing it from the base of the chair. Next, insert the new cylinder into the hole at the base of the chair, and screw it in until it is tight. Finally, replace the plastic cap on top of the cylinder.
So if you see your chair height adjustment not working. If you suspect that the hydraulic cylinder is the culprit, then you should change it.
Replacing the gas in the cylinder is dangerous, and you should never try it.
Chairs with various usages