VPORTA / PROCESS VALVE SYSTEMS
Flanged vs wafer V-port valve
Connection style affects installation and interchangeability. It does not by itself determine seat leakage, controllability or lifetime.
| Decision point | Flanged VQ47 | Wafer VQ77 |
|---|---|---|
| Connection | Integral valve flanges | Body installed between pipe flanges |
| Installation dimensions | Check stated face-to-face standard and drawing | Often manufacturer-specific |
| Bolting | Flange-to-flange connection details | Long bolts and clearances need review |
| Catalogue size range | VQ47: DN15–DN500 | VQ77: DN25–DN250 |
| Catalogue pressure range | VQ47: PN10–40; Class 150/300 | VQ77: PN10–20; Class 150 |
| Catalogue seat scope | Metal and soft-seat configurations | Metal only in the supplied 2023 flyer |
What changes the decision?
Published ranges are taken from the supplied 2023 flyer. Confirm the current drawing, series and pressure-temperature rating before treating a replacement as dimensionally interchangeable.
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.