China Pneumatic Floating Ball Valve With Floating Ball Structure Tight Sealing
china pneumatic floating ball valve with floating-ball structure, tight sealing for chemical, water-treatment and process pipeline.
Description
1. Product Overview
The china pneumatic floating ball valve features a floating‑ball design in which the ball is not rigidly supported but can shift slightly along the axis. Under medium pressure, the ball is pressed against the downstream seat, creating a self‑energising seal. A pneumatic actuator rotates the ball 90° for full open/close control. The actuator is available in double‑acting and single‑acting spring‑return versions; the latter automatically closes on loss of air supply.
Optional accessories such as solenoid valves and limit switches enable integration into industrial pneumatic control systems. The valve is primarily flanged, with threaded options on certain sizes. The floating‑ball construction adapts well to pressure fluctuations, making it widely used in chemical processing, water treatment, and oil‑gas auxiliary lines, while effectively reducing internal leakage.
2. Materials & Technical Specifications
| Parameter | Detail |
|---|---|
| Nominal sizes | DN15–DN200 (1/2″ – 8″) |
| Drive type | Pneumatic actuator |
| Ball structure | Floating ball |
| Actuator type | Double‑acting / Single‑acting spring return |
| Connection | Flanged; optional BSP/NPT threads on selected sizes |
| Body material | WCB carbon steel / SS304 / SS316 stainless steel |
| Air supply pressure | 0.4–0.7 MPa |
| Key characteristics | Floating‑ball design, self‑energising seal, pressure‑adaptive, low internal leakage |
| Optional accessories | Limit switches, solenoid valves, air preparation units (FRL) |
| Working pressure | 1.6–6.4 MPa |
| Medium temperature | –29°C ~ 180°C |
| Applicable media | Chemical raw materials, process water, oil & gas, wastewater, mildly corrosive fluids |
3. Application Scenarios
Typical deployments include chemical process lines, oil‑and‑gas auxiliary piping, municipal and industrial water treatment, food and pharmaceutical production lines, city gas transmission, packaged wastewater treatment equipment, and metallurgical fluid control systems.
4. Real‑World Project
At the Chem‑Flow Lyon chemical intermediate plant in Lyon, France, the china pneumatic floating ball valve has been installed in bulk on process transfer lines. Thanks to the floating‑ball design, higher medium pressure increases the sealing force against the seat, enhancing shut‑off performance and effectively suppressing internal leakage under high‑pressure conditions. For routine continuous process lines, the double‑acting china pneumatic floating ball valve is chosen for stable on‑off control.
5. Selection Guide & Distinctive Strengths
The key advantage is the floating‑ball structure – the ball floats slightly and leverages medium pressure for self‑energised sealing. Sealing effectiveness improves with rising pressure, compensating for seat wear and maintaining long‑term leak‑tight performance – ideal for lines with fluctuating pressures.
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For high‑risk applications requiring fail‑safe closure on air loss → choose the spring return china pneumatic floating ball valve.
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For highly corrosive chemical media → prefer the stainless steel china pneumatic floating ball valve.
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For central control rooms needing valve‑status feedback → configure with the limit switch china pneumatic floating ball valve.
Note: The floating‑ball design is better suited for small‑to‑medium bore sizes; for high‑pressure, large‑diameter applications, evaluate the ball thrust to avoid excessive operating torque. The product complies with ISO and CE international standards. We provide application selection manuals, dimensional drawings, and installation/maintenance guides to facilitate project integration and acceptance for overseas engineering contractors. Bulk orders are welcome, and separate replacement parts – including pneumatic actuators and seat seals – are available to reduce future maintenance costs.
