VPORTA / PROCESS VALVE SYSTEMS
V-port vs full-port ball valve
A full-port ball valve and a V-port control valve solve different flow-path problems. Match the geometry to the required task.
| Decision point | V-port valve | Full-port ball valve |
|---|---|---|
| Opening | Characterized V-notch or V-shaped port | Usually a circular bore |
| Main selection priority | Controllable capacity over a range | Low-loss isolation when fully open |
| Modulation | Designed and sized for suitable control duty | Possible only when the specific design is suitable |
| Piggability | Generally not assumed | Possible in suitably designed full-bore systems |
| Seat wear at low opening | Must be assessed for the fluid and trim | Sustained throttling may expose seats unfavorably |
| Ordering language | Specify segment or full-ball construction | Specify actual bore and isolation features |
What changes the decision?
Do not assume that machining a notch into a general isolation valve creates a qualified control valve. The seat support, shaft stiffness, actuation and characterized capacity also matter.
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.