320 AxFlo Anti-Cavitation trim is a heavy duty dirty service trim option designed for entrained particulate and high pressure drop applications. AxFlo trim offers multi-stage protection against cavitation and erosion.
You can expect enhanced trim life when using AxFlo trim because pressure gets distributed over the length of the valve plug across multiple STAGES. Each STAGE is not exposed to the full pressure differential, and on properly sized 320 valves, the amount of pressure drop per STAGE is controlled to prevent cavitation.
Principles of Operation
Dyna-Flo 320 AxFlo trim is a high resistance, multi-stage, axial flow path trim, which means process fluid will flow through AxFlo valves parallel to the axis of the plug and cage.
This design is well suited to reduce clogged flow passages in applications involving fluids with entrained particles.
You can expect enhanced trim life when using AxFlo trim because pressure gets distributed over the length of the valve plug across multiple Stages, this means each
Stage is not exposed to the full pressure differential. On properly sized 320 valves, the amount of pressure drop per Stage is controlled to prevent cavitation
problems and to minimize erosion issues.
| AVAILABLE CONFIGURATIONS | ||||||
| BODY | ASME CLASS & TRIM TYPE | SIZE | END CONNECTION | |||
| RF AND RTJ (FLANGE CONNECTION) | BWE | SWE | NPT | |||
| GLOBE | ASME CLASS 300 & 600 AXFLO 3-STAGE | 2" NPS (50mm DN) | ü | ü | ü | ü |
| 3, 4, 6 & 8" NPS (80, 100, 150 & 200mm DN) | ü | ü | ü | û | ||
| ASME CLASS 900 & 1500 AXFLO 4-STAGE | 2" NPS (50mm DN) | ü | ü | û | û | |
| 3, 4, 6 & 8" NPS (80, 100 & 150mm DN) | ü | ü | û | û | ||
| AVAILABLE SHUTOFF CLASSIFICATION | ||
| VALVE SIZE | VALVE TRIM TYPE | SHUTOFF CLASS |
| ALL | ALL | CLASS V |
| CHARACTERISTIC | PREFERRED FLOW DIRECTION |
| LINEAR - ANTI-CAVITATION | FLOW UP |
AxFlo trim is designed to have no significant flow for the first 15% of travel, this design feature is in place to maximize the life of the seat ring.
The multi-stage clearance flow design helps prevent high pressure drops in the seating area during throttling at low capacity. By preventing these high pressure drops, we can significantly extend the shutoff capability while simultaneously enhancing the throttling control at low travels.
