Soler & Palau TD-4000/355 TRIF Three-Phase Steel Duct Fan

A steel-cased, three-phase in-line fan for 355 mm ducts

The Soler & Palau TD-4000/355 TRIF is the three-phase version of the metal-cased TD-4000: 355 mm connection, 3160 m3/h at 1150 rpm and only 309 W absorbed. According to the datasheet, models 4000 and 6000 are built with a steel casing finished in epoxy-polyester paint instead of the plastic used for smaller sizes, and carry a class F motor with IP54 protection.

This is the code to ask for when a mechanical contractor needs an in-line booster on a 400 V three-phase board, wants to drive it from a frequency inverter, or needs a wider ambient window than the plastic models. The printed temperature range for the TRIF is -40 to +70 degC, the widest in the TD-MIXVENT table.

Datasheet features for the 4000 and 6000 construction

• Steel casing finished in a tough epoxy-polyester paint coating; protection class I (the plastic models are class II).
• Motor class F with ball bearings and safety thermal overload protection, IP54; ball bearings greased for life.
• Three-phase 400 V, 50/60 Hz for model 4000 (the 6000 is 400 V, 50 Hz); three-phase models can be adjusted by inverter control.
• Voltage speed control is listed as suitable for the series 4000 and 6000 motors.
• Same bracket principle as the rest of the series: the motor and impeller assembly can be fitted or removed without dismantling the ducting.

Technical specification

Single-phase or TRIF?

The catalogue lists the same body as TD-4000/355 on single phase, at 1360 rpm, 407 W, 1.69 A, 3750 m3/h and -40 to +40 degC. The TRIF delivers about 16 percent less air (3160 against 3750 m3/h, derived) but absorbs about 24 percent less power and tolerates 30 degC more ambient. Choose on the supply you have and the temperature at the fan, then confirm the duty point against the performance curve.

The VFTM TRI 0,37 inverter named for this model is a catalogue pairing. Check inverter output and cable length with your electrical consultant, because the datasheet does not give motor insulation or cable limits.

Installation and handling

Verify the data plate against the 400 V supply before power-up, as the catalogue instructs. Protection class I (printed for the steel models) means the casing relies on a protective earth connection, so earth the fan as your wiring rules require. The catalogue gives sound pressure at 3 m in free air with rigid ducts at inlet and outlet, and performance in accordance with ISO 5801 and AMCA 210-99 with dry air at 20 degC and 760 mmHg, and the TRIF has its own performance curve page. The dimensional sketch shows the mounting feet, and dimension K is printed as an 8.5 mm hole diameter. The unit weighs 19 kg, so plan the support for that mass.

Where it fits

Use it for duct boosting in commercial kitchens, parking-level ventilation branches, workshops and process-support rooms where a plastic casing is not preferred and three-phase power is on hand. It carries no ATEX or fire-rated marking in the catalogue pages we fetched, so it is not a smoke-extract or hazardous-area fan. See more HVAC and combustion equipment.

Installation and selection notes

The TRIF model is three-phase and suits supply from a 400 V board; if it will be driven by a frequency inverter, check the inverter and motor compatibility with the supplier. Plan access to the terminal box, support the steel casing on the building structure and add a flexible joint on at least one side. Because the casing is class I, the earth connection must be made correctly according to the electrical rules.

Information needed for a quotation

Send the full model code, the quantity, the supply voltage and phase, the delivery location in Oman or the GCC and any accessories such as controllers, silencers, dampers or flexible connectors, so that the complete package can be quoted together.

Documents and supply information

The manufacturer data sheet is attached to this page and should be read together with the project specification before a purchase is confirmed. Airflow, pressure, sound and motor values are quoted as printed on that sheet. Lead time, stock position and certificates available with the shipment are confirmed in the quotation, and we supply to Oman and the wider GCC region for industrial, utility and building services projects.

Related codes

Related in the same catalogue: TD-6000/400 TRIF (400 mm, 5330 m3/h, 691 W) for more airflow, the single-phase TD-4000/355 for the same body on a 230 V supply, and the plastic TD-500 to TD-2000 sizes for smaller ducts. Confirm connector, flange and controller needs against the catalogue drawing before you order. When you send the enquiry, quote the full code TD-4000/355 TRIF, the 400 V supply, whether an inverter (VFTM TRI 0,37) or the RMT-1,5 controller is wanted, and the ambient temperature at the fan, because the -40 to +70 degC window is one of the reasons to pick the TRIF version.

Frequently asked questions

What supply does the TD-4000/355 TRIF need? Three phase 400 V, 50/60 Hz, per the datasheet supply note for model 4000.

What airflow and power are printed? 3160 m3/h at 1150 rpm, 309 W and 0.66 A.

What temperature range is printed? -40 to +70 degC for the TRIF version.

Is the casing plastic? No. Models 4000 and 6000 use a steel casing with epoxy-polyester paint.

Is Seven Star LLC the manufacturer? No. Seven Star LLC is an independent supplier in Muscat; confirm the exact model, voltage and options before ordering.