Home > Product > Ball Valve > Based on Bore Type > Reduced Bore (Reduced Port) Ball Valve
Looking for a compact, economical, and reliable shut-off valve? The Reduced Bore Ball Valve (also known as a Reduced Port Ball Valve) is your ideal choice for non-critical flow control applications. At Perfect Engineers, we manufacture and supply reduced bore valves in SS304, SS316, WCB, Brass, and PVC, perfect for water, air, steam, oil, and general industrial pipelines.
If your application doesn’t require full bore flow, a reduced bore valve helps you save space and cost—without compromising performance.
A Reduced Bore Ball Valve has an internal ball opening (bore) smaller than the diameter of the pipeline. This creates a slight restriction in flow, which is acceptable in many utility, HVAC, or chemical systems.
These valves are more compact, lighter, and affordable than full bore valves and are suitable for on/off control where flow turbulence is not a major concern.
| Parameter | Specification |
|---|---|
| Size Range | ¼” to 6” |
| Body Material Options | SS304, SS316, Brass, WCB, PVC |
| Seat Material Options | PTFE, RPTFE, Graphite, Delrin |
| Pressure Rating | PN10–PN100 / Class 150–300 |
| Temperature Range | -20°C to 200°C (Graphite Seated) |
| End Connections | Threaded (BSP/NPT), Flanged, SW, BW |
| Design Standard | ASME B16.34, ISO 5211, API 598 |
| Operation | Manual / Pneumatic / Electric |
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| Feature | Full Bore Valve | Reduced Bore Valve |
|---|---|---|
| Flow Area | Equal to pipe size | Smaller than pipe size |
| Pressure Drop | Minimal | Moderate |
| Best For | Slurries, pigging | Water, air, oil lines |
| Size & Weight | Bulkier | More compact |
| Cost | (Budget-friendly) | |
| Cleanability | Better | Standard |
Yes, flow rate is reduced by about 10–15%, but pressure loss is usually acceptable in general applications.
No. Use full bore or cavity-free designs for thick or abrasive media.
Yes. We offer all models with ISO 5211 pads for actuator mounting.
Up to 1000 PSI depending on valve size and body material.
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