Multi-hole restriction orifice
Suitable for reducing noise when passing the orifice
GENERAL DATA
- Standards: Element based on ISO 5167, ASME MFC-3M or R.W. MILLER.
- Mounting between flanges: ISO PN 2,5 to PN 420, ASME 150 # to 2500 #, others on consultation.
- Material: Standard: 304L / 316L stainless steel, others according to your application.
- Fluid: liquid, gas, steam.
- Diameter of pipes: all sizes.
- Orifices: dimensioned according to the fluid, the pressure drop or the flow to be achieved going through the restriction.
- Plate thickness: calculated taking into account the pressure drop generated by the plate and the diameter of the pipework in order to avoid a deformation of the plate. For more details, see our Frequently Asked Questions.
- Noise: the number of orifices is determined according to the level of noise not to be exceeded.
The maximum noise level depends on the operating conditions: limited to 85 dB(A) by the regulatory body for an average daily exposure in continuous operation. Intermittent or emergency operation - acceptable upper values (see corresponding regulations).
If the noise level is still too high, it is possible to switch to a multi-stage restriction orifice. - Cavitation: the cavitation level is checked for each plate and the orifices are calculated to avoid cavitation. For more information on cavitation, see our Frequently Asked Questions.
- Critical flow or choked flow: the orifices are calculated at the critical flow limit for a maximum pressure drop. For more information on critical flow, see our Frequently Asked Questions.
You can find below our most frequently asked questions / answers.
If you do not find the answer you are looking for, please contact us either by phone at +33 (0)5.59.30.85.20 or via the contact form. We will respond as soon as possible.
