The Airtac M5 valve series is a functional replacement for the SMC VZM400 series.1. Exhaust outlet locates over the body, which is convenient to install muffler to decrease noise and pollution.2. The external force required by direction-change of series of M5B, M5R and M5L is provided by external mechanism, which can be position test or [stroke switch] limit switch3. M5C, M5D, M5Y, M5PF, M5PM, M5PP, M5PL and M5HS are operated manually, owning control joints with several structure forms and suitable for application under different conditions.4. It is in sliding column structure that control force is not influenced by working pressure (that is, there is no back pressure effect); internal circle is sealed with good tightness and the direction-change is sensitive.5. Lubricant is not necessary.6. Multi-mounting makes it convenient to install and apply.7. The control joints of series of M5C, M5D, M5Y, M5R and M5L are made of metal which has longer service life and more reliable and steady performance.