VPORTA / PROCESS VALVE SYSTEMS
V-port ball valve vs eccentric plug valve
Both can be useful in difficult process service. Their sealing motion and flow-path shapes differ, so compare validated duty limits.
| Decision point | V-port valve | Eccentric plug valve |
|---|---|---|
| Geometry | V-notched segment or characterized ball | Eccentric plug with design-specific seat engagement |
| Travel | Rotary | Rotary |
| Solids suitability | Depends on segment clearance, seat and trim | Depends on flow passage and seating action |
| Controllability | Use the actual Cv-versus-travel data | Use the actual Cv-versus-travel data |
| Erosion resistance | Material, geometry and velocity dependent | Material, geometry and velocity dependent |
| Replacement check | Dimensions, torque, curve and direction | Dimensions, torque, curve and direction |
What changes the decision?
Avoid treating eccentric plug, eccentric hemispherical and segmented ball as interchangeable names. Request a section drawing and the offered manufacturer’s actual capacity and leakage data.
Compare offers on the same basis
- Use identical medium composition, flow cases, pressures and temperatures.
- State the same leakage test, failure response and accessory scope.
- Compare expected maintenance and spare parts alongside the purchase price.
- Request drawings and technical deviations before accepting an alternative.
Not sure which valve fits?
Tell us what the valve needs to do. Include whether the duty requires modulation or isolation only.