Brand: Spirax Sarco

Spirax Sarco TFA Steam Target Flowmeter

Name: Spirax Sarco TFA Steam Flowmeter – Datasheet & Price Quote
Brand: Spirax Sarco

Description

Overview

Spirax Sarco TFA is a target-principle steam flowmeter purpose-built to solve one of the most persistent metering challenges on industrial sites: economically and accurately monitoring steam flow in small line sizes. Many flow technologies lose accuracy or become cost-prohibitive at DN25 to DN50, yet these lines often feed critical process equipment where energy accounting matters just as much as it does on a large distribution header. The Spirax Sarco TFA flowmeter closes that gap, giving plant engineers a robust, single-loop-powered instrument that measures saturated steam flow directly at the point of use, supporting energy audits, sub-metering programs, and departmental cost allocation.

With fast quotation turnaround and technical support, Seven Star LLC proudly supplies the Spirax Sarco TFA flowmeter to process plants, hospitals, hotels, and manufacturing facilities across Oman and the wider GCC. Seven Star LLC supplies the Spirax Sarco TFA on request with application support and the Spirax Sarco technical documentation, for buyers in Muscat and beyond.

Measurement Principle

The Spirax Sarco TFA operates on the target flow principle. A precision target, mounted centrally in the steam line, is struck by the moving fluid, and the resulting drag force deflects the target proportionally to the mass flowrate. This deflection is sensed electronically and converted into a density-compensated mass flow signal, so the instrument continues to report true mass flow even as steam density shifts with pressure. The signal is transmitted as a single loop-powered 4-20mA output alongside a pulsed output, and the unit incorporates an internal totaliser for cumulative flow tracking without an external data logger.

Because the target and stem are the only moving parts within the flow path, the Spirax Sarco TFA avoids the wear mechanisms that plague orifice plates and mechanical turbine meters in steam service. There is no rotating rotor to seize from scale or wet steam carryover, and the compact target profile introduces minimal permanent pressure loss compared with differential-pressure primary elements. Practically, this means lower long-term maintenance, more stable calibration over the service interval, and dependable readings even in plants where feedwater treatment is imperfect and steam quality varies across shifts.

Engineering Design of the Spirax Sarco TFA

The Spirax Sarco TFA flowmeter body is manufactured from 300 series stainless steel with internals in stainless steel 431 S29 or 300 series, giving the instrument the corrosion resistance and mechanical strength needed for continuous saturated steam duty. It is available in DN25, DN32, DN40 and DN50 sizes with a matching range of pipe connections including EN 1092-1 PN16, PN25 and PN40 flanges, ASME B16.5 Class 150 and Class 300 flanges, and Japanese JIS 20 and Korean KS 20 standards, allowing a single product family to serve projects specified to European, American, or Asian piping codes without substitution.

The electronics housing is cast in aluminium LM25 and carries an IP65 rating when fitted with the correct cable glands, protecting the transmitter electronics from washdown, humidity, and dust in plant rooms and outdoor steam distribution areas. Communication is via Modbus over EIA 232C (RS232) as standard, with an optional EIA 485C (RS485) interface for 24VDC-powered multidrop networks, letting the Spirax Sarco TFA integrate directly into a building management system or steam metering SCADA platform without an intermediate signal converter.

Key Features

The Spirax Sarco TFA combines rugged construction with straightforward integration, and the features below explain why it remains a preferred choice for small-bore steam metering.

Target-principle sensing delivers density-compensated mass flow with no moving parts exposed to erosive wear beyond the target and stem itself.
Available in DN25, DN32, DN40 and DN50 sizes to match compact steam branch lines feeding calorifiers, sterilizers, and process heat exchangers.
Flanged in EN 1092-1, ASME B16.5, JIS and KS standards, simplifying specification on multi-standard EPC and retrofit projects.
Single loop-powered 4-20mA output plus pulsed output provides flexible integration with existing control and metering infrastructure.
Built-in totaliser accumulates steam consumption without requiring a separate data acquisition unit.
Modbus EIA 232C as standard, with optional EIA 485C for integration into networked energy management systems.
Stainless steel body and internals with an IP65-rated aluminium LM25 electronics housing suit demanding plant room and outdoor environments.
Compact target geometry keeps permanent pressure loss low compared with orifice-plate alternatives of equivalent accuracy.

Industrial Applications

The Spirax Sarco TFA is widely specified wherever steam is used in smaller quantities but still needs to be accounted for accurately, including hospital sterilization plant, hotel and hospitality laundry and kitchen steam lines, food and beverage cooking and pasteurizing loops, and individual process branches within larger district energy schemes. In Oman, facilities across Muscat’s hospitality and healthcare sectors, along with process industries in the Sohar and Salalah economic zones, rely on this class of instrument to sub-meter steam consumption by building, department, or production line, supporting energy cost allocation and ISO 50001 energy management programs.

With engineering support in Muscat, Seven Star LLC supplies the Spirax Sarco TFA flowmeter with technical support to EPC contractors, MEP consultants, and plant engineering teams throughout Oman and the GCC. Whether the requirement is a single replacement meter for an aging calorifier branch or a multi-point sub-metering rollout across a manufacturing campus, Seven Star LLC supplies on request with application engineering support, with lead time confirmed at quotation.

Technical Specifications

The table below summarizes the core specifications of the Spirax Sarco TFA steam flowmeter; consult the Spirax Sarco technical datasheet TI-P193-01 for full sizing and installation data.

Parameter	Specification
Model	Spirax Sarco TFA
Measuring Principle	Target flow (drag-force) measurement
Service	Saturated steam
Sizes	DN25, DN32, DN40, DN50 (1″, 1¼″, 1½″, 2″)
Pipe Connections	EN 1092-1 PN16/PN25/PN40; ASME B16.5 Class 150/300; JIS 20; KS 20
Flowmeter Body Material	Stainless steel 300 series
Internals Material	Stainless steel 431 S29 / 300 series
Flowmeter Stem	Stainless steel 300 series
Electronics Housing	Aluminium LM25
Ingress Protection	IP65 (with correct cable glands)
Power Supply	Loop powered; 24VDC with optional RS485
Output Signal	4-20mA proportional to mass flow/power (not available with RS485)
Pulsed Output	Vmax 28Vdc, Rmin 10kΩ
Communication	Modbus EIA 232C (RS232); optional EIA 485C (RS485)

Request a Quote for Spirax Sarco TFA Steam Target Flowmeter

Seven Star LLC invites facility engineers, EPC contractors, and procurement teams across Oman and the GCC to request a formal RFQ for the Spirax Sarco TFA steam flowmeter. Seven Star LLC supplies on request with lead time confirmed at quotation, provides the full Spirax Sarco technical datasheet on request, and connects buyers directly with our instrumentation division for sizing and installation guidance. Contact Seven Star LLC today to confirm lead times and pricing for your saturated steam metering project.

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About brand

Spirax Sarco is the British steam engineering company known for steam traps, pressure reducing valves, stop valves, separators and steam flowmeters. Its roots go back to 1888, when Herman Sanders founded a London business importing thermostatic steam traps under the Sarco name. The Spirax brand followed in 1932, the company moved to Cheltenham in 1937, and it was listed in 1959. The group now trades as Spirax Group and is still headquartered in Cheltenham.

Seven Star LLC is an independent supplier in Muscat. We list Spirax Sarco steam traps, valves, clean steam equipment and flowmeters, and supply them to boiler houses, hospitals, food plants and process plants in Oman and the GCC.

Spirax Sarco at a glance

Origins	1888, London: Sanders, Rehders & Co. ("Sarco") imports thermostatic steam traps
Milestones	Spirax brand in 1932; move to Cheltenham in 1937; listed as Spirax-Sarco Engineering in 1959; now Spirax Group plc
Headquarters	Cheltenham, United Kingdom
Product families	Steam traps, pressure reducing and control valves, stop and check valves, separators and filters, steam flowmeters, clean steam generators and sanitary valves

Spirax Sarco products we list

Family	Models	Typical use
Steam traps	TD42, TD120M, FTS14 ball float, BT6-B, BPC32YF, BPS32, BTM7, PC4000 connector, STS17.2 station, AVM7 air vent	Draining condensate and venting air from mains, tracing and process equipment
Pressure reducing and surplussing valves	DP27, BRV71/73, SRV2S, SRV66, SDP143	Reducing boiler pressure to the pressure the user needs, and protecting the boiler from overload
Stop, check and ball valves	BSA/BSAT, BSA3HP, BSA3BD, A3S, DBB3, DCV1, M10S	Leak-free isolation on steam with bellows-sealed stems, and backflow prevention
Clean steam and sanitary	CSG-HS generator, CS10 separator, CSF16 filter, STERI-TROL, SVL488 safety valve, M70i	Hospitals, sterilisers, pharmaceutical and food production
Steam flowmeters	ILVA, TVA, TFA	Measuring steam use per boiler, building or process

Good steam systems remove condensate and air as soon as they form, because water in a steam line causes water hammer and wet steam carries less usable heat. Thermodynamic traps like the TD42 suit steam mains and tracing. Ball float traps like the FTS14 discharge continuously and suit heat exchangers. Balanced pressure traps vent air quickly at start-up. A trapping station such as the STS17.2 puts the isolation valves, strainer and trap on one connector, so the trap can be changed in minutes.

Where Spirax Sarco products are used

In Oman and the GCC, Spirax Sarco equipment is used in boiler houses of refineries and petrochemical plants, power and desalination stations, hospitals, hotels and laundries, and food, beverage, dairy and pharmaceutical plants.

Ordering Spirax Sarco products: what we need

Send the model, size (DN), end connection, body material and pressure rating. For steam traps, add the operating pressure and condensate load. For pressure reducing valves, add the inlet and outlet pressure and the steam flow in kg/h.

Facts checked against Spirax Group company history, October 2026.

Browse Spirax Sarco products by category: Clean Steam, Globe Valve, Flowmeters.

FAQ

Questions about the Spirax Sarco TFA Steam Target Flowmeter

Answers from our engineering team on installation, compatibility and integration.

01What does the Spirax Sarco TFA flowmeter measure?

The Spirax Sarco TFA measures saturated steam mass flow using the target principle, where fluid force on an internal target is converted into a density-compensated 4-20mA and pulsed output signal, ideal for small line sizes from DN25 to DN50.

02Does the TFA flowmeter reduce installation cost and downtime?

Yes. The TFA is a single in-line flanged unit with no external primary element or straight-run tapping required beyond standard installation guidance, so it installs faster than orifice-plate metering runs and requires minimal process downtime during fitting.

03What sizes and materials are available for the Spirax Sarco TFA?

The TFA is available in DN25, DN32, DN40 and DN50 with EN 1092-1, ASME B16.5, JIS and KS flange standards. The flowmeter body and internals are manufactured in 300 series and 431 S29 stainless steel for steam service durability.

04Can the TFA integrate with existing building management or SCADA systems?

Yes. The TFA outputs 4-20mA and pulsed signals as standard and supports Modbus over EIA 232C or optional EIA 485C, allowing direct integration into legacy BMS, energy management, or SCADA platforms without additional signal conversion hardware.

05Is Seven Star LLC an experienced supply partner for Spirax Sarco products?

Yes. Seven Star LLC supplies Spirax Sarco products to customers in Oman and the GCC and can provide the manufacturer documentation and technical support on request.