Our centrifugal fans span a wide duty range of volume and pressure combinations. This enables RHF to deliver fans that operate at or close to maximum efficiency.
Standard Arrangements
| Format | Configuration |
|---|---|
| No1 Channel Base |  |
| No4 Pedestal |  |
| No4 V |  |
| No7 Pedestal |  |
| No9 Monoblock |  |
| Plugs |  |
Special Arrangements
| Format | Configuration |
|---|---|
| No4 Plug Swingout |  |
| No 4 Plug Special Casing |  |
| No9 Plug Double Discharge |  |
| No2 Lagged Special |  |
Centrifugal impellor range
RHF aim to produce best in class centrifugal fans.
To deliver better centrifugal solutions we have designed our products from first engineering principles, which makes sure that all the fundamentals are taken care of.
We have complemented this with innovative thinking in a number of areas, which gives our products a clear competitive edge and gives our customers superior performance.
Taking care of engineering fundamentals means that RHF:
Engineer all impellors to be capable of withstanding imposed stresses and to be sufficiently stiff to ensure that they run in perfect balance, by using finite element analysis to predict stresses and deflection on blades, shrouds, back plates, hubs and welds.
Precisely engineer impellors, giving mass, centre of gravity and inertia to enable accurate shaft, bearing and drive design.
Check shafts for deflection and combined critical speed, taking account of loads imposed by impellor and drive.
Check bearings for combined load, life calculations and lubrication intervals. Including motor bearing and shaft, not simply fan bearing and shaft.
Deliver all of the above with absolute consistency through the application of bespoke software, providing an optimum engineering solution for each and every fan.
- We offer our fan designs in essentially 2 styles, a universal style and a fixed style.
- The universal casing is usually offered with sizes up to 900mm impellor diameter
- The universal casing has 13 possible variants
- The fixed split casing is usually offered with sizes greater than a 900mm impellor diameter
- The fixed casing has 3 possible variants
- RHF offer 9 standard arrangements with the above mentioned variants
- RHF offer other non standard arrangements/ specials
Test, test and test again
A commitment to proving the effect of our design thinking and production quality means that RHF test all solutions. Our process involves changing inlet and impellor profiles, blade numbers, cut-off geometries and clearance.
This approach has delivered significant improvements in operating efficiency for all our fans. Additionally, whilst measuring flow performance, in duct sound is also established.
RHF now supply full noise spectrum figures over each products entire operating range.