Bubble-tight damper designed for isolation applications. Bubble-tight means the damper has the lowest possible leakage rating: zero. The silicone blade seal and double-gland axle seals provide bubble-tight performance. There are many options when considering electric or pneumatic actuators. Some include solenoid valves and switches. Contact factory for assistance.1. Create a barrier between hazardous contaminants and filter change out components typical to a containment system2. Isolate contaminated filters and protect service personnel3. Typical applications: Isolate filters and contaminated components in bag-in/bag-out systems