A pneumatically actuated U-PVC ball valve – single-acting is used to control and direct liquid flow in automated control systems. Thanks to its single-acting design, it operates by applying air pressure in only one direction. The return movement is performed automatically by a spring mechanism. This feature ensures that the valve returns to the closed position in the event of system failures.

Inside the valve, there is a ball made of U-PVC material that directs the flow. This ball is rotated 90 degrees by the actuator to move between the open and closed positions. U-PVC material is preferred due to its chemical resistance and lightweight structure. As a result, high performance is achieved at a low cost.

The actuator system is supported by a low-friction piston and pinion mechanism. This allows the valve opening and closing operations to be completed with minimal energy. It operates solely with compressed air, without the need for any electrical connection. Therefore, it offers safe operation in environments with a risk of explosion.

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Where Is a Pneumatically Actuated U-PVC Ball Valve Used?

These types of valves are widely used in water treatment plants for automatic flow control. They are also preferred in chemical production facilities, agricultural irrigation systems, and HVAC projects. In food and beverage production lines, hygienic liquid flow is kept under control.

Long-term performance is also ensured in applications requiring chemical resistance. The corrosion-resistant valve body reduces operating and maintenance costs. In addition, thanks to its single-acting design preferred for process safety, the valve automatically closes in the event of power or air supply failures.

Pneumatic Actuated U-PVC Ball Valve – Single Acting

Technical Specifications and Actuator Information

The connection diameters can be matched with actuators of different force ratings according to system requirements. Below is a list of the pneumatic actuator models used and their 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 Type:

An on-off control system is applied.
Proportional control can be selected as an optional feature.

Construction Features

The aluminum extrusion cylinder surface provides long service life and low friction.
Thanks to its symmetrical design, reverse mounting is possible.
Stainless steel pinion gears provide stable operation over a long service life.
Wear on friction surfaces is minimized.
All components are manufactured in accordance with DIN 3337 and ISO 5211 standards.

Advantages of U-PVC Ball Valves

Thanks to its lightweight design, easy installation is ensured.
Resistance to chemicals and UV radiation is provided.
It offers a compact solution that can be operated with low torque.
Automatic closing is ensured during power or air supply interruptions thanks to the single-acting system.
It offers a long service life while remaining cost-effective.

More information can be found on the Unox Actuated Valves page.