When the external pipe rises upward, the air enters the air cylinder from the small hole in the middle sleeve at the bottom of the external pipe of the air cylinder, and the handle is pressed down. The gas enters the internal pipe of the air cylinder through the one-way valve set at the top of the internal pipe, and enters the valve of the tire along the leather pipe. When the handle is lifted up for the second time, the check valve is closed. Press it again, and the air will push the check valve into the tire.

New type of air cylinder with slipping outer tube: when the outer tube is upward, air enters the air cylinder from the small hole in the middle sleeve at the bottom of the outer tube of the air cylinder, press the handle downward, and the gas enters the inner tube of the air cylinder through the one-way valve set at the top of the inner tube, and along the leather tube enters the valve of the tire. When the handle is lifted up for the second time, the check valve is closed. Press it again, and the air will push the check valve into the tire.

The principle of the two-way inflator: there is a gap between the piston of the empty two-way inflator and the barrel wall, and there is a downward concave rubber bowl on the piston. Pull the piston upward, the volume of air under the piston will increase, the pressure will decrease, and the air on the piston will squeeze downward from around the rubber bowl. When the piston is pressed down, the volume of air under the piston decreases, the pressure increases, and the rubber bowl is close to the inner wall. To prevent air leakage to the piston, the piston continues to press down. When the air pressure can fill the valve core of the tire, the compressed air enters the tire. At the same time, the air outside the barrel enters the piston from the gap at the top of the barrel.

At present, the common pump is made of stainless steel, which is mainly because of its strong oxidation resistance, long service life, no rust, corrosion, deformation, lead-free safety, hardness, wear resistance and other advantages, durability, and is widely used in various spheres, bicycles, motorcycles and other fields.

How to install and connect the two-way inflator?

1 After receiving the two-way inflator, if it is found that it is not assembled or the air nozzle on the two-way inflator needs to be replaced, take out the air nozzle, air cylinder rod and handle first.

2 Then, loosen the nut on the new air nozzle, and turn the tail of the nut backward through the air duct.

3 If there is a multi pipe ring, put the multi pipe ring into the gas pipe, insert the end of the supplementary pipe, insert the gas pipe, tighten the nut and the air port, and now the gas vent pipe is connected to the gas pipe.

4 Then take out the air cylinder handle, align it with the screw hole on the main rod of the air cylinder, and slowly screw it in.

In this way, the air two-way inflator is completely assembled, and the metal needle shaped air nozzle can generally be used to inflate the basketball.

6 When the two-way inflator is required, select the air nozzle matching the air nozzle of the tire from the two-way inflator and clip the air nozzle of the tire (for example, when inflating the basketball, first insert the needle shaped air nozzle into the red air nozzle). You can then use an air inhaler to draw in air.