Product Introduction：
Usage
Pneumatic interlockvalve is installed on the bottom unloading couplers, API valves and vaporrecovery valves to prevent it from leaving the loading rack while connected tothe loading arm.
product details：
Feature
1. Mainshaft seal prevents the dust into sealed district.
2. It isused for vapor recovery valve installation position.
3. Firminstallation and support improve service life.
4. Can beinstalled with all TTMA flanges.
5. Controllingopening and closing by pneumatic controller.
6. 1/4NPT air lineholes.
