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A Vented Ball Valve is the smart choice when your system handles trapped media, gaseous fluids, or hazardous chemicals. At Perfect Engineers, we design and manufacture precision-engineered vented ball valves that enhance system safety by preventing pressure buildup between the ball and downstream cavity during shut-off.
Ideal for compressed air, gas, chemical, and hydraulic systems, our vented valves ensure that residual pressure is safely released, preventing accidents, leaks, or valve failure.
A Vented Ball Valve looks similar to a standard ball valve but features a small vent hole drilled into the ball or stem side. When the valve is in the closed position, the vent connects the ball cavity to atmosphere or a safe vent line—relieving pressure trapped inside the valve body.
This makes it especially useful in systems handling:
| Parameter | Specification |
|---|---|
| Size Range | ¼” to 4” |
| Pressure Rating | PN16 to PN100 / Class 150 to 600 |
| Body Materials | SS304, SS316, WCB, Brass, PVC |
| Seat Options | PTFE, RPTFE, Graphite, Metal Seated |
| Vent Position | Body cavity to outlet / atmosphere / drain port |
| End Connections | Threaded, Flanged, Welded, Clamp |
| Operation | Manual / Pneumatic / Electric |
| Mounting Standard | ISO 5211 for actuator compatibility |
| Fire-Safe Certification | Available as per API 607 / ISO 10497 |
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| Feature | Inline Vented | External Vented |
|---|---|---|
| Vent Direction | Vents into downstream line | Vents to atmosphere or drain |
| Common Use | Process-safe gases or clean fluids | Toxic, hazardous, or flammable media |
| Installation Type | Standard in-line | Requires vent connection or exhaust line |
| Safety Level | ⚠ Moderate | ✅ High protection |
No. It is essential when handling compressed gas, flammable fluid, or media prone to thermal expansion.
Yes. We offer externally vented ball valves with a designated vent port.
Yes. We offer fire-tested designs as per API 607 / ISO 10497 on request.
Yes. All models are ISO 5211 actuator-ready for electric or pneumatic actuation.
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