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Dosch - Model BLS 100 R -Restriction Orifice
Restriction orifices are used to generate a defined pressure loss in process piping or blow out lines. In special cases they may be designed to limit the flow to a specific value. Restriction orifices are applicable for all single phase fluids.
Restriction orifices are normally designed as a simple plate with an attached tag handle. Thisplate is mounted between pipe flangesand can be offered for all existing types of flange faces.Restriction orifices may also be designedas a weld-incomponent.
If the plant dictates limits to the noise level or if the pressure loss could lead tocavitation,an option isto use a multihole or multistage restriction orifice. A combination of multihole and multistage design is also possible. For most materials we also offer various hardness coatingsof the orifice bore hole in order to achieve a higher durability and a longerservice lifetime.
The calculation of the orifice bore hole is based on the well-known standard ISO 5167 for differential pressure flow measurement. The calculated pressure loss is only valid for the given operation point. Therefore, a restriction orifice should not be used for process control. We calculate the noise level in dB(A) based on the standards VDMA 24422 and 24423.
according to EN 1092-1:
- flat (form B1 and B2)
- groove (form D) tongue (form C)
- female (form E)
- male (form E)
according to ASME B16.5:
- flat (RF and SF)
- groove (small/large)
- tongue (small/large)
- male/female (small/large)
- RTJ male or female
or according to other flange standards specified by the customer.