A tube fitted in the B-and π-type metal valve includes the following sections: the base of the tube with a valve; bridge-shaped gasket or round gaskets, nuts will use this tube wall washer, valve pad and the base valve compression (squeezing directly nuts could undermine the partial pressure of rubber and rubber); bridge pad nut; compression nut, ie when installing tires, valve inserted into the rim of the hole after the nuts set in the valve stem (π-type valve without this nut); valve core; cap.

　　Should be consistent with the thread manufacturing valve so that any replacement nuts, cap and valve core.

　　According to the following method to install and fixed inner tube valve: A valve cylinder valve through the perforated inner tube wall mat, all valve tube section shall be exposed, and then the bridge-shaped pad or gasket in the valve stem cap and Shang Hao compression nut.

　　Since the valve and valve base pad valve tube and the tube wall pressed each other, thus making the valve should have a fixed place airtight.