2 The pneumatic jalousie is always open if there is airless. But if in emergency, you can operate the electromagnetic valve to make the pipeline supplying air. Locking the cylinder piston rod into cylinder and making it out of the handle, the jalousie will automatically shut off by its weight and spring-loaded.
3 You can operate the handle manually to make the blade open through the rope. When the cylinder piston rod is just aligning the handle and pop-up and positioning ,the blade will be in a permanent open state.
