|
|
|
|
|
|
|
FEATURES
Marine grade centrifugal fans manufactured under license from Witt & Sohn are available for standard and high pressure applications in various drive configurations.
Witt & Sohn well proven expertise has established this product as one of the leaders in Marine fan technology and associated noise and vibration control.
With a standard fan design as the starting point for a given application, using the latest CAD technology the Witt design team can rapidly incorporate any requisite design modifications from standard component elements to accommodate even the most exacting fan specification.
This means that such specification criteria (eg. severity of duty; space limitations; special materials and surface treatments) - can be incorporated efficiently and at considerably less cost and lead time than a conventional one off design approach.
CONSTRUCTION
AXIAL - FLOW FANS
- Inlet Sizes - 63 to 2500 mm.
- Casing Thickness - 1,5 to 20 mm.
- Casing Pressure Types - RNN & LRZ (Low Pressure) PRZ & MRZ (Medium Pressure) HRZ (High Pressure)
- Impeller Types - Min. 6 types per casing
- Motor Frame Sizes - NEMA or IEC Standard
- Drive Types - Direct, V-belt or coupling
- Materials - Steel, Aluminum, Stainless Steel, Titanium, Special Alloys
- Surface Treatment - As axial flow fan
- Outlet Positions -See Attached
- Special Designs -Flame-proof; shock-proof; extreme temperature; gas-tight; rubberized; decontaminable; corrosion resistant, as required
|
|
CAL
For use in aggressive environments, this robust fan type delivers medium pressures. Air quantities can reach 20.8 m3/s, and pressures up to 8,500 Pa. Impeller diameters range from 630 to 1250 mm for directly coupled versions and from 315 to 1250 mm for belt-driven versions. Impeller blades are curved backwards.
|
|
CENTRIFUGAL FANS
nlet sizes 63 to 2500 mm.
Casing thickness 1,5 to 20 mm.
Casing pressure types RNN & LRZ (Low pressure). PRZ & MRZ (Medium pressure). HRZ (High pressure). SRZ (Ultra-high pressure).
Impeller types Min. 6 types per casing incl. dust impellers.
Motor frame sizes 63 to 450.
Drive types Direct, V-belt or coupling.
Materials Steel; aluminium; stainless steel; titanium; spec. alloys.
Surface treatment As axial flow fan.
Outlet positions To Eurovent.
Special designs Flame-proof; shock-proof; extreme temperature; gas-tight; rubberised; decontaminable; earth-quake proof; corrosion resistant, as required.
CCESSORIES
shaped inlets
fire dampers
protection grills
mushroom cowls
vibration attenuators
jet cowls
flexible connections
counter flanges
silencers
variable inlet vanes
inlet/outlet dampers
acoustic enclosures
insulations
monitoring instrumentation
|
|
Centrifugal fan for large air volumes and low to medium pressures.
Centrifugal fan VRQ-5E, direct drive (optional pulley belt drive)
Surface: hot-dip galvanized or powder coated
Options: pully belt drive, ATEX, various accessories
Sizes:
VRQ-5E 355 - 1.000 (Ømm)
Application:
HVAC and refrigeration systems for machinery and accomodation rooms, short and long casings, thick metal casings up to 10mm, max. 80°C
Technical Data:
V = 1.000 - 60.000 m³/h
P = 300 - 3.700 Pa
L = 0,55 - 45 kW
|
|
Centrifugal fan for large air volumes and low to medium pressures.
Centrifugal fan VRQ-12E, pulley belt drive
Surface: hot-dip galvanized or powder coated
Options: pully belt drive, ATEX, various accessories
Sizes:
VRQ-12E 250 - 1.000 (Ømm)
Application:
HVAC and refrigeration systems for machinery and accomodation rooms, short and long casings, thick metal casings up to 10mm, max. 80°C
Technical Data:
V = 1.000 - 70.000 m³/h
P = 100 - 3.700 Pa
L = 0,18 - 55 kW
|
|
The standard COMBIMAC delivery program provides the following types of fans:
- cast iron fans
- steel welded fans
- steel welded high pressure fans
- material transportation fans
- indirect driven fans
- steel welded high pressure fans
- material handling fans
These different types of fans cover a wide range of different flow and pressure areas. Documentation on our standard fans can be found under the button Download.
To select a suitable fan meeting your requirements, our Fan Selection System for Windows (WinFSS) program could be of assistance to you. This program enables you to select a centrifugal fan from our standard range of fans under specific conditions.
If no suitable fan can be found by WinFSS, please contact us. We will then try to find an alternative solution in our extensive range of special fans.
|
|
Type TTF, turbo fan is available diameter from 280 mm to 1400 mm.
Backward curved blades are coupled directly or by v-belt.
|
|
|
Centrifugal fans types CNA and CNB are light-weight, compact, low pressure fans with high efficiency designed for universal installation. They are therefore well suited for marine or industrial ventilation and air conditioning system where economic operation and a low sound are important factors. The impeller is made of broad, backward curved blades.
|
|
| ... products without information |
| |
|
|
