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FEATURES
Marine grade axial fans manufactured under license from Witt & Sohn are available for standard and high pressure applications.
Witt & Sohns well proven expertise has established this product as one of the leaders in Marine fan technology and associated noise and vibration control.
With a standar 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 - 250 to 2800 mm.
- Casing Thickness - 1,5 to 16 mm.
- Impeller Types - N, M, X, Y, H (adj. Pitch)
- Motor Frame Sizes - NEMA or IEC
- Drive Types - Direct, V-belt or coupling
- From Positions - See attached to Positions as requested
- Casing Designs - Short/long casing, swing out, w/wo shaped inlet
- Surface Treatment - Primer; finish; hot-dip galvanized, as required
- Materials - Corrosion resistant cast Impellers Aluminum
- Materials - Steel, aluminum, special Casings Alloys
- Special Designs - Flame-proof; shock-proof; high temperature, as required
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ACN
The Novax ACN axial flow fans have pre-settable blades and are for duct installation and suitable for both conventional installations for marine and for industrial ventilating applications.
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AXIAL-FLOW FANS
nlet sizes 250 to 2800 mm.
Casing thickness 1,5 to 16mm.
Impeller types N, M, X, Y (adj.pitch).
Motor frame sizes 63 to 400.
Drive types Direct, V-belt or coupling.
Positions A,AU,AD,B,BD,BU (Eurovent).
Casing designs Short/long casing, swing out, w/wo shaped inlet.
Surface treatment Primer; finish; hot-dip galvanised, as required.
Materials - Impellers Corrosion resistant cast aluminium.
Materials - Casings Steel, aluminium, special alloys.
Special designs Flame-proof; shock-proof; earth-quake proof; high temperature, as required.
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Axial fan for low pressures, with direct drive
Surface: hot-dip galvanized or powder coated
Options: pully belt drive, ATEX, various accessories
Sizes:
VM 250 - VM 1600 (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 - 200.000 m³/h
P = 100 - 1.400 Pa
L = 0.25 - 75 kW
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Axial fan, high efficiency (-83%), blades adjustable when stationary, direct drive, medium pressure fan
Surface: hot-dip galvanized or powder coated
Options: pully belt drive, ATEX, various accessories
Sizes:
VML 500 - VML 2.000 (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 - 450.000 m³/h
P = 100 - 2.800 Pa
L = 0,25 - 250 kW
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Axial fan for high pressure with direct drive
Surface: hot-dip galvanized or powder coated
Options: pully belt drive, ATEX, various accessories
Sizes:
VH 310 - VH 1.250 (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 - 150.000 m³/h
P = 300 - 2.500 Pa
L = 1 - 90 kW
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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
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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.
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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
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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
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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
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GT Centrimaster belt driven
These single inlet, centrifugal fan series consists of centrifugal fans, belt driven, available with two types of impeller:
-Impeller with forward curved blades made of galvanized sheet steel.
- Impeller with backward-curved blades, made of sheet steel and welded, coated with epoxy powder. The fans are also available in a spark-proof version with the inlet cone made of brass.
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This is a single duct air supply unit designed for ceiling mounting above the false ceiling. Intended for climate control in spaces on board ships, such as cabins, offices, messes, utility spaces etc.
- Provides good thermal comfort.
- Offers individual temperature control of both supply air temperature and air flow.
- Available for manual or automatic control by means of a pneumatic or electrical actuator.
- Offers quick and simple installation and commissioning.
- The internal insulation satisfies the criteria of IMO Resolution for classification as non-combustible.
- Conforms to the provisions of IMO Resolution for false ceilings with fire resistance rating B15.
- Satisfies the vibration and temperature requirements specified by Det Norske Veritas.
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In addition to their standard range of fans, COMBIMAC are well-equiped to manufacture custom-built fans and fan systems to suit individual customer's applications and requirements.
In order to meet these requirements COMBIMAC can offer fans manufactured from the following materials:
- cast iron
- cast aluminium
- aluminium
- stainless steel
- sheet steel
- non-ferro materials
- exotic materials
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For direct supply or exhaust at duct end, for instance, in engine rooms requiring a high rate of air changes.
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For direct installation in duct systems. Supplied with an impeller with adjustable pitch marine grade aluminum alloy blades, direct coupled to a motor. The fan housing and flanges are in heavy plate in accordance with the requirement of international classification society.
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For direct installation in duct systems. Supplied with an impeler with adjustable pitch marine grade aluminum alloy blades direct coupled to a motor, and easy access for motor servicing. The fan housing & flanges in heavy plate.
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A full series is available, including axial flow internal types, axial flow external types, turbo types, and multi-blade types for marine use, offering a choice to meet diverse requirements. Impellers of axial flow fan type are aluminum cast, and all due consideration has been given to their use as fans for marine use in terms both of their casing thickness and the paint skin thickness. A rich array of models including the FA, LR, FAX, FD, TB, MF, and TF are available, depending on the method of installation, purpose of use, etc.
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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.
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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.
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Type TTF, turbo fan is available diameter from 280 mm to 1400 mm.
Backward curved blades are coupled directly or by v-belt.
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FEATURES
Marine grade intake and discharge terminals are weatherproof. Manufactured from heavy gauge steel, vents are closable, equipped with a hand wheel.
- Accepted by Lloyd Register of Shipping
- Heavy gauge steel construction
- Flange mounted or welded installation
- Wire mesh opening protection
- Weather resistant closing mechanism
- Built to meet requirements of Regulatory Bodies
- Available for any required capacity
- Primed and/or painted finish
- Easy cleaning access
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FEATURES
Horizontal Type, ceiling mounted 530N Fan Coil Units provide high capacity local cooling/heating.
- Shock tested to MIL-S-901D
- High performance
- Compact Unit
- Completely prepackaged
- Units are completely tested on performance according to ARI 440-98and ASHRAE 79-91
- Factory tested
- Low weight
- Left /Right hand connections
- Electric /Hot Water Heating
- Low structure borne noise levels allow the unit to be hard mounted to the ships structure
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- Portable or wall mounted low-noise fan heater
- Designed to meet applicable marine requirements
- Type approved
Specifications:
- Wall mounted or portable fan heater for marine and offshore applications.
- Corrosion resistant housing of hot zinc-plated and powder coated steel panels.
- Re-setable overheat protection.
- Low noice fan.
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VMA-VMB
These air heaters are integrated units with axial flow fans and heating coils. Two versions are available, depending on the heat media being either boiler water or district heating water.
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Fan coil units can be applied when cooling or heating is required. This unit can be easily installed in the compartment without being entirely visible. It is possible to install several in the same compartment. This way the capacity is increased or can be dispersed without any problem. Included with this system are all standard items that are required for mounting and installing the unit. Fan coil units can be perfectly combined with all our existing systems.
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Approved by GL, BV, DNV, LRS, ABS, RS, energy-efficient and environment-friendly, designed to DIN EN 60034 (IEC 72), mounting dimensions and assignment of output ratings to DIN 42673, 42677 or progressive, robust low-vibration grey cast iron design, degree of protection IP 55, higher degrees up to IP 65 on request, class F insulation with thermal reserve, class H available as an option, terminal box optionally top-mounted, RHS or LHS, various modifications possible
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