In pneumatics, stop valves allow the controlled opening and closing of piping and thus of the compressed air supply. In addition to check valves and quick exhaust valves, Festo also offers shut-off valves, ball valves and logic valves for pneumatic applications.
Check valves and quick exhaust valves combine the function of flow control and stop valves in one component. The compressed air can flow freely in one direction, while in the opposite direction the flow rate can be changed by an adjusting element. Check valves and quick exhaust valves are often used with pneumatic cylinders to regulate speed. A stop valve that has been very successful in pneumatics and is therefore part of our Core Range is the HGL with a piloted non-return function. The HGL has an external thread so it can be screwed in, it is pneumatically piloted and is compatible with M5, G1/8...G1/2 connections as well as fittings QS-4...QS-12. The stop valves H, HA and HB with non-return function can be used for a wide range of applications thanks to the connecting threads and plug-in connection on both sides. The piloted check valve VBNF has a low overall height, can be rotated 360° horizontally when mounted and allows a high flow rate. The valves SE, SEU and VBQF are suitable for quick exhausting. The latter stands out thanks to its low installation height, high flow rate and reduced noise emission.
借助截止阀和球阀，手动关闭功能可以完全阻断压缩空气的双向流动。在气动系统中，截止阀和球阀经常用于压缩空气供应的分布式关断功能。
Festo 截止阀 HE 以及QH球阀 、QH-QS、QHS-QS 均为手动截止阀。关断阀 HE 可通过螺纹或插头进行连接，固定方式多样。球阀 QH 采用双侧内螺纹设计，直接安装在管路上。QH-QS 和 QHS-QS 既可直接安装在管路上，也可通过隔板式螺纹接头进行安装。如需在维护设备组合上游、气枪处等位置以及出于气缸排气等目的对压缩空气设备进行进气和排气处理，欢迎选择我们的 手拉阀 VBOH。VBOH 是无重叠的关断阀，切换时无压力损失风险。