A few words about valves
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What kind of valve is this? Valve operated by a single-acting cylinder. Closed paddle blind
Single acting cylinder operated valve – Single-acting pneumatic valve； I personally think “cylinder” means “gas cylinder”. Closed paddle blind: eight-character blind pattern.
Valve operated by a single-acting cylinder. It is a pneumatically actuated valve; pneumatic valves generally have two types of actuation mechanisms: double acting and single acting. Single acting means that it can be set to open or closed, and when there is no air supply, it automatically returns to the other state. There is usually a spring inside the cylinder. Double acting means that air is required both for opening and closing, and the valve maintains its current state when there is no air supply
Cylinder refers to a pneumatic cylinder; we often use pneumatic actuators, and the models of these actuators are classified according to the cylinder diameter
Paddle blind refers to a blind plate. Spectacle blind is an 8-character blind plate