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.

• 型夹管阀采用的纯树脂橡胶具有优异的抗磨损能力，因为A型夹管阀只是采用气压进行操作，因此没有活动部件会断裂或磨损。