If no such packing is available, slightly thicker packing will do, but thinner packing is not suggested under any circumstances. In general, the packing should be as thick as half the difference between the valve stem diameter and the interior diameter of the packing chamber or stuffing box. Selection of a proper tool to take out the packing so as not to damage like scratches on the valve stem and valve packing chamber or stuffing box.Ĭlean the valve stem and valve packing chamber properly and carefully from the formation of scratches. It is required to reduce valve operating torque and to prevent stem wear.įirst of all, the correct selection of packing materials is confirmed, so that stem packing is suitable for the maximum working pressure and temperature of the process and the kind of fluid being handled. The stem packing should be replaced preferably every 2 to 3 years even though valves have no failure such as leakage.
Replacement Procedure for Valve Stem Packing There are few main criteria for the selection of valve packing. Tire pressure plays a big role in overall ride quality, compliance and traction. Here are a few resources to help you if you are unsure what tire pressure you should be running.Stem packing is a type of seal, damps leakage between moving part and housing, is essential for the control valve. With a now clean valve core, which allows uninterrupted airflow, you can easily inflate the tire to get an accurate reading of tire pressure. You can run lower tire pressure with tubeless but make sure to inflate to the proper pressure for your weight and ride application. You don't want it to loosen while riding or to unthread trailside when using a packable pump with a threaded pump head. When installing the new or cleaned valve core, make sure it's fully tightened. If you can't, and the valve is too clogged or damaged, replace it. Sometimes you can remove the dried sealant from this area but other times you can't. We've also illustrated where sealant build up happens and causes problems with air flow. Below is a example of a new valve core next to an old one so you can see the difference. Now this valve isn't too bad, but you can see there is some sealant built up around the valve core's seal. While the valve core is removed, check it. Different tire sizes and applications will require differing amounts. Note: Refer to the sealant manufacturer's guidelines in regards to the amount of sealant to install. You'll find that simply pouring sealant into the valve stem isn't going to work. Most sealant manufacturers offer a syringe or some type of sealant injector. Simply remove your valve core by unthreading it from the valve stem with a Lifeboat Tire Lever or valve core remover, and inject with sealant.
#VALVE STEM REPLACEMENT INSTALL#
This is by far the cleanest and easiest way to install sealant. Here we have a few tips to help you as you install and use sealant in your tubeless tires. It also dries up, needs replacing, and can clog and potentially seal things you don't want sealed, like your valve core.īut don't worry.
First off it's messy, and can get on everything if not dealt with properly. It can be a life saver when small punctures happen but it can also be a bit of a nuisance to install.
Chances are, that if you run tubeless, you've probably formulated a love hate relationship with sealant. It reduces weight, prevents flats, accommodates lower tire pressures for better traction and compliance, but it also comes with a few additional service requirements in order for it to function properly.įor flat prevention, sealant needs to be installed in your tubeless tires. Running tubeless tires has many benefits.
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