Unox Double-Acting Pneumatic Actuator–Operated U-PVC Butterfly Valve for Acid Applications
What is a Pneumatic Actuated U-PVC Butterfly Valve?
A U-PVC butterfly valve is a type of valve made from unplasticized polyvinyl chloride (U-PVC). Butterfly valves are used to start, stop, or regulate the flow of fluids in a pipeline system. They are commonly installed in water systems and industrial piping networks.
U-PVC butterfly valves are widely preferred because they are lightweight, easy to install, and highly resistant to corrosion. These properties ensure a long service life even in demanding environments.
How Does a Butterfly Valve Work?
A butterfly valve operates using a disc-shaped closure element inside the pipe. This disc rotates to control flow:
- When open, the disc aligns with the flow direction, allowing fluid to pass with minimal resistance.
- When closed, the disc turns perpendicular to the flow, completely blocking it.
This simple quarter-turn mechanism makes butterfly valves fast and efficient in operation.
Where Are U-PVC Butterfly Valves Used?
- Water treatment plants (filtration and disinfection processes)
- Chemical processing industries (due to chemical resistance)
- Food and beverage industry (liquid and gas control)
- HVAC systems (airflow regulation in ducts)
- Agricultural irrigation systems
- Plumbing and water distribution systems
- Industrial applications such as oil & gas, pharmaceuticals, and power plants
General Properties of Polyethylene Materials
- High mechanical strength
- Resistant to acids, bases, and solvents
- Excellent dielectric (electrical insulation) properties
- Resistant to environmental conditions
Depending on application requirements, actuators with torque values ranging from 9 Nm to 400 Nm are used. Optional accessories such as switch boxes and directional valves can also be integrated.
Pneumatic Actuator Models and Torque Values
- UDA 040 = 9 Nm
- UDA 052 = 25 Nm
- UDA 063 = 50 Nm
- UDA 083 = 94 Nm
- UDA 092 = 135 Nm
- UDA 105 = 270 Nm
- UDA 125 = 400 Nm
Control Types
- On/Off control
- Proportional control
Construction Features
- Aluminum extruded body with high corrosion resistance and low friction for long service life
- Symmetrical design for easy installation and reversible operation
- Compact pistons made of special aluminum alloy for fast response
- High-quality steel pinion enabling 45°–90° mounting flexibility
- Industrial-grade plastic bearings reducing wear and friction
- Precision-machined modular gears for smooth and quiet operation
- Stainless steel fastening elements for long-term durability