I worked at a shop and when we would put on tires and new valve stem we would first cut the inside off or at least sever it and then you screw on the puller to the valve and use the rim as a fulcrum and pull out the old valve stem. Then you should lube up the new valve stem stick it through the hole and attach the remover and pull it through till it snaps in place.
You may be referring to the valve stem on each wheel.
Fit a new valve stem.
Unless one is a skilled mechanic, one should not use a tyre machine. One should have safety glasses, mounted tire and rim valve stem remover, valve core remover,a tire tool bar and tire lubricant before attempting to use a tyre machine.
Bellow is similar to a hollow flexible hose. It functions like a vertical diaphragm (parallel instead of perpendicular to valve stem). It seals with the valve stem at one end, and seals with the valve body at the other end. Therefore, it allows a small relative move between valve stem and body, but prevents fluid from leaking across bellow surface. The move pushes seat or stem tip for valve to close or open. --SteveX
Valve stem OD refers to the outer diameter of a valve stem. This measurement is important for determining the size compatibility between the valve stem and other components in a system, such as seals or guides. Choosing the correct valve stem OD ensures proper fit and functionality.
Attached to the valve stem inside the tire/wheel.Attached to the valve stem inside the tire/wheel.
In the tire. It is the valve stem.
Through the spark plug hole, soak the valve with penetrating oil. After sitting a while, tap lightly on the valve stem with a hammer. If after several tries this does not work then the head will need to be removed to see why the valve is stuck.
The valve guide is a precise hole in the head that the valve stem slides in. The valve is retained by the retainer and two valve locks.
If the refrigerant has escaped, get a a/c valve stem kit from a autoparts store. They cost a few dollars and come with a stem tool and a few valve stem core that resemble tire valve stem cores. If you still have pressure, you will need a special tool that costs about 40 bucks.
The spline that lifts and lowers the part to shut the valve be globe or gate valve
Rising stem gate Valve- Stem threads are out side of valve body and in no contact with fluid medium. Stem rises while opening the valve (by hand wheel). Since the stem threads are located outside obviously it needs some more vertical clearance space while opening the valve.Non Rising Stem gate Valve - Stem threads are inside the the valve body and it is in contact with fluid medium. Hence, lot of chances for fouling the threads and these types of valves only can be used in clean liquids and gases. Less vertical clearance space required while opening the valve.