Flow Problem
FRI S.r.l. provided in 2018 a reverse engineering on Valves from Brand not anymore on the Market.
- Reverse Engineering on Spare Parts
- Valve Disassembly
- Reverse Engineering
- Examinations on sealing areas and all components
- Flange actuator adjustment & assembly
- Functional Test
- Reassembly & final visual test
- Project nameFlow Problem on a Non-F.R.I. Valve
- Project DateMarch 2018
- ClientAnsaldo Nucleare
- LocationBrasil
The Client was facing a turbulent and discontinuous flow that can cause the CHATTERING and DISC SLAM phenomenon on 2 check swing valves. Both of these phenomena accentuate the instability of the flow and involve strong noise, incorrect valve functionality, reduced valve life and possible problems with the equipment located downstream. The solution proposed by FRI was to install a flow rectifier (HoneyComb Flow Straightening). Flow rectifiers of this type are usually used in wind tunnels to reduce the effects of discontinuities and allow much shorter paths.
The rectifier must be positioned at a distance of approximately one diameter from the intersection “a tee” to avoid the addition of localized pressure losses and develop as close as possible to the valve inlet in order to maximize its effects. The cell size must not be too small to contain the induced load losses; the best compromise between efficiency and energy loss occurs with cells measuring approximately 60mmx60mm. The benefits are reduced noise, an increased life expectancy of the valves and a reduction of turbulence-induced
problems in systems downstream of the installation.
Without the addition of a flow rectifier
With the addition of a flow rectifier
