The trapped air in the diaphragm will force the diaphragm between the inside of the sleeve and the outside of the piston.
罩在隔膜内的空气将施加力量在隔膜上，使其进入套筒内部和活塞外部之间。
2
The pure gum rubber sleeve of the Type A Valve offers excellent abrasion resistance, and since the Type A uses only air pressure to operate, there are no moving parts to break or wear out.