ABB Torbar averaging pitot tube FPD350

Overview

The ABB FPD350 Torbar is a standalone averaging pitot tube – the sensing bar itself, supplied as a primary element to be paired with a differential pressure transmitter of the customer’s choice. This distinguishes it from the PitotMaster FPD550, which packages the same averaging pitot principle together with an integral valve manifold and transmitter as one pre-assembled insertion unit. The Torbar accommodates circular, square, or rectangular section pipes and ducts ranging from just 10mm to 8000mm (0.4 to 315 inches) in diameter, one of the widest size ranges of any flow primary element ABB offers.

With engineering support in Muscat, Seven Star LLC supplies the FPD350 across Oman and the GCC for customers who already operate a fleet of a particular transmitter brand and want a compatible primary element rather than a fully bundled assembly, and provides the manufacturer documentation on request.

Operating Principle

The Torbar probe carries multiple pressure-sensing ports along a bar that spans the pipe or duct diameter, averaging the velocity profile across several points rather than relying on a single centerline reading. The high-pressure side samples the impact pressure from the upstream-facing ports while the low-pressure side reads the downstream wake, and this differential pressure is fed to an external transmitter that converts it to a flow rate. When installed strictly per ABB’s published installation guidance, the calculated differential pressure falls within an uncertainty band of ±1% at 95% confidence; installations that deviate from standard guidance may need on-site calibration to confirm accuracy.

Because the probe occupies only a narrow bar across the bore instead of restricting the full cross-section, the permanent pressure loss it introduces is very low compared with an orifice plate – the same low-pressure-loss advantage the PitotMaster assembly offers, delivered here as a bare primary element.

Engineering Design of the FPD350

Installation uses a single hole drilled or hot-tapped into the pipe or duct wall, with mounting adapters available for both threaded and flanged connections, avoiding the need to cut the pipe or weld in new flanges for a measurement retrofit. Pressure and temperature ratings depend on the specific model and valve configuration selected: threaded T1, T3, T4, and L7 models are rated to 50 bar at temperatures up to 400-450°C, the H7 high-pressure retractable flanged version reaches 100 bar at 400°C with an integral gate valve for hot-tap insertion and removal under process pressure, and flanged T5 models are available to ANSI Class 2500.

The bar is available in a range of lengths and materials to match the pipe or duct diameter and process conditions, including 316, 304L, 321, 304H, and 310 stainless steel, corrosion-resistant alloys such as Alloy 400, C276, and 625, and duplex or super duplex grades for aggressive media. Unlike the PitotMaster’s integral manifold-and-transmitter format, the FPD350 leaves the transmitter selection entirely to the customer – ABB’s own 266-series or any third-party DP transmitter can be connected via standard impulse piping.

Key Features

• Standalone averaging pitot primary element, sold without an integral transmitter.
• Multi-port sensing bar averages the velocity profile across the pipe diameter.
• Accuracy of ±1% at 95% confidence per ABB’s published installation guidance.
• Exceptionally wide size range: 10mm to 8000mm (0.4 to 315 inches) diameter.
• Very low permanent pressure loss compared to an orifice plate.
• Pressure ratings up to 100 bar (H7 retractable) or ANSI Class 2500 (T5 flanged).
• Temperature ratings up to 450°C depending on model.
• Compatible with any third-party or ABB differential pressure transmitter.

Industrial Applications

The FPD350 is used across water, gas, and process utility lines in Muscat, Sohar, Salalah, and the wider GCC where a plant wants the averaging pitot measurement principle but needs to pair it with an already-standardized transmitter fleet rather than accepting a bundled transmitter. Its exceptionally wide size range also makes it a practical choice for large-diameter duct and pipe applications, such as HVAC air handling ducts or large raw water mains, that many other primary element technologies cannot economically cover.

Seven Star LLC, as a trusted ABB supplier, supplies the FPD350 as the primary-element-only option and the PitotMaster FPD550 (see related product) as the complete pre-assembled alternative, helping customers across Oman’s industrial and utility sectors choose based on their existing instrumentation standards and installation requirements.

Technical Specifications

The table below summarizes the FPD350’s core specifications as supplied by Seven Star LLC.

Request a Quote for ABB Torbar averaging pitot tube FPD350

Contact Seven Star LLC to submit a formal RFQ for the ABB FPD350 Torbar averaging pitot tube, request the full technical datasheet, or check current availability and lead time for Oman and the GCC. Backed by manufacturer datasheet documentation, Seven Star LLC’s instrumentation division can help specify the correct bar length, material, and pressure rating for pairing with your existing transmitter fleet.

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• ABB-Sensyflow FMT400-VTS/-VTCS
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Where the ABB FPD350 Torbar is used

• Circular pipes
• Square and rectangular ducts
• Large air and gas ducts
• Fleets using one transmitter brand
• Lines needing low pressure loss

Selection checklist for the ABB FPD350 Torbar

• Pipe or duct shape
• Pipe or duct size
• Fluid type
• Transmitter to pair
• Mounting style
• Straight run available
• Process conditions
• Part number match

Installation, commissioning and maintenance notes for the ABB FPD350 Torbar

Fit the bar across the pipe or duct following the installation guidance of the maker. Connect the high and low pressure lines to the transmitter. Check the sensing ports and the lines at regular intervals.

Requesting a quotation for the ABB FPD350 Torbar

Please send the pipe or duct size, the fluid and the transmitter brand. Seven Star LLC serves industrial customers in Oman and the GCC and replies with a quotation based on the information provided.

FPD350 Torbar device type

It is a standalone averaging pitot tube.

FPD350 Torbar maker

It is made by ABB.

FPD350 Torbar role

It is the sensing bar itself, supplied as a primary element.

FPD350 Torbar pairing

It is paired with a differential pressure transmitter of the customer’s choice.

FPD350 Torbar PitotMaster

The PitotMaster FPD550 packs the same principle with a valve manifold and a transmitter as one unit.

FPD350 Torbar shapes

It fits circular, square or rectangular pipes and ducts.

FPD350 Torbar size range

It covers one of the widest size ranges of the flow primary elements of ABB.

FPD350 Torbar ports

The probe carries several pressure-sensing ports along a bar.

FPD350 Torbar span

The bar spans the pipe or duct diameter.

FPD350 Torbar averaging

It averages the velocity profile across several points rather than one centerline reading.

FPD350 Torbar high side

The high-pressure side samples the impact pressure from the upstream-facing ports.

FPD350 Torbar low side

The low-pressure side reads the downstream wake.

FPD350 Torbar transmitter

The differential pressure goes to an external transmitter that converts it to a flow rate.

FPD350 Torbar pressure loss

The narrow bar adds very little permanent pressure loss compared with an orifice plate.

FPD350 Torbar installation guidance

Installation should follow the published guidance of ABB.

FPD350 Torbar calibration

An installation that departs from the guidance may need on-site calibration.

FPD350 Torbar existing fleets

It helps customers who already run one transmitter brand and want a compatible primary element.

FPD350 Torbar documentation

Manufacturer documentation is supplied on request.

FPD350 Torbar support

Seven Star LLC gives engineering support from Muscat.

Flow records for the ABB FPD350 Torbar

Record the pipe data, the transmitter used and the date of each check.

Choosing the right ABB FPD350 Torbar bar size

Choose the bar from the pipe or duct size, its shape and the process data.