Brand: Spirax Sarco

Spirax Sarco TVA Steam Target Flowmeter

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

Description

Overview

Spirax Sarco TVA is a target-principle steam flowmeter engineered to capture the entire steam flow range on a single line, from the lowest night-time base loads to full production-peak demand. Where many primary flow elements are sized around a narrow operating band and lose accuracy outside it, the Spirax Sarco TVA delivers a wide 50:1 turndown at best-practice steam velocities, so plant teams get one continuous, trustworthy dataset for energy accounting instead of stitching together readings from multiple meters or accepting blind spots at low load.

Working closely with plant engineers in the region, Seven Star LLC proudly supplies the Spirax Sarco TVA flowmeter to power stations, process plants, and district steam networks across Oman and the wider GCC. Seven Star LLC supplies the Spirax Sarco TVA on request with application engineering support and manufacturer documentation for buyers in Muscat and across the Sultanate.

Operating Principle

The Spirax Sarco TVA operates on the target principle, but unlike a fixed target it uses a moving cone that responds dynamically across the flow range. Steam flow exerts a force on the cone that is proportional to mass flowrate; this force is measured and converted into a density-compensated mass flow signal, transmitted as a single loop-powered 4-20mA output together with a pulsed output for totalisation. Because the sensing element automatically compensates for changing steam density, the Spirax Sarco TVA holds accuracy across both saturated steam duty and, when fitted with the dedicated pressure sensor kit, superheated steam service.

The moving-cone design is what enables the flowmeter’s signature 50:1 turndown, meaning a single instrument accurately captures both minimum overnight steam demand and maximum production-peak flow without re-ranging or swapping primary elements. With no rotating rotor or bearing assembly exposed to wet steam erosion, the Spirax Sarco TVA sustains long-term calibration stability and avoids the maintenance burden associated with mechanical turbine meters, while its wafer-style body keeps permanent pressure loss low across the operating range.

Engineering Design of the Spirax Sarco TVA

The Spirax Sarco TVA is built in a wafer design for fitting directly between line flanges, available in DN50, DN80 and DN100 sizes to suit EN 1092 PN16/PN25/PN40, BS 10 Table H, ASME B16.5 Class 150/300, Japanese JIS 20, and Korean KS 20 flange standards. The flowmeter body is manufactured in stainless steel S.316 1.4408 CF8M, with internals in a combination of 431 S29, S303, S304 and S316 stainless steels and an Inconel X750 spring, giving the assembly the corrosion resistance and mechanical fatigue life demanded by continuous high-pressure steam service.

For superheated applications, the Spirax Sarco TVA pairs with a dedicated pressure sensing kit comprising an AISI 304 stainless steel sensor housing, an AISI 630 stainless steel sensor, and a carbon steel high-pressure syphon tube assembly with a PEEK/Polymain valve seat, isolating and protecting the sensor from direct process temperature. The electronics housing is cast in aluminium LM25 with an IP65 rating when correctly glanded, and communications run over Modbus EIA 232C as standard with an optional EIA 485C interface, matching the TVA to the same BMS and SCADA integration pathways used elsewhere in a Spirax Sarco steam metering installation.

Key Features

The Spirax Sarco TVA is specified where a single meter needs to represent an entire steam system’s flow profile reliably, and the following features explain its performance across that range.

Moving-cone target sensing captures the complete steam flow range with a 50:1 turndown at best-practice velocities.
Suitable for both saturated and superheated steam service when fitted with the dedicated pressure sensor kit.
Wafer-style body in DN50, DN80 and DN100 fits directly between EN 1092, BS 10, ASME, JIS and KS flanges.
Stainless steel S.316 body with Inconel X750 spring and multi-grade stainless internals for long operating life.
Density-compensated mass flow output via single loop-powered 4-20mA and pulsed signal, with built-in totaliser.
Modbus EIA 232C as standard, with optional EIA 485C for networked energy management integration.
Low cost of ownership through quick wafer installation and a well-proven, highly reliable design.
IP65-rated aluminium LM25 electronics housing withstands demanding plant room and outdoor conditions.

Industrial Applications

The Spirax Sarco TVA is the preferred choice wherever a facility needs full-range steam accountability on a single meter, including power generation auxiliary steam, refinery and petrochemical process headers, district cooling plant boiler feeds, and pharmaceutical and food processing utilities where steam demand swings sharply between shifts. In Oman, industrial users across the Sohar and Salalah economic zones, along with district cooling and process facilities serving Muscat’s commercial and hospitality sectors, depend on this class of wide-turndown flowmeter to capture accurate energy data across highly variable production schedules.

With fast quotation turnaround and technical support, Seven Star LLC distributes the Spirax Sarco TVA flowmeter with complete technical backing to EPC contractors, energy managers, and plant engineering teams throughout Oman and the GCC. From single-point retrofits on an existing steam header to full instrumentation packages for new-build process plant, 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 TVA steam flowmeter; consult the Spirax Sarco technical datasheet TI-P192-01 for full sizing and installation data.

Parameter	Specification
Model	Spirax Sarco TVA
Measuring Principle	Target flow (moving-cone drag-force) measurement
Service	Saturated and superheated steam (superheated with pressure sensor kit)
Turndown	50:1 at best-practice steam velocities
Sizes	DN50, DN80, DN100 (wafer design)
Pipe Connections	EN 1092 PN16/PN25/PN40; BS 10 Table H; ASME B16.5 Class 150/300; JIS 20; KS 20
Flowmeter Body Material	Stainless steel S.316 1.4408 CF8M
Internals Material	431 S29 / S303 / S304 / S316 stainless steel
Spring	Inconel X750 or equivalent
Electronics Housing	Aluminium LM25
Ingress Protection	IP65 (with correct cable glands)
Power Supply	Loop powered; 24VDC with optional RS485
Output Signal	4-20mA (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 TVA Steam Target Flowmeter

Seven Star LLC invites energy managers, EPC contractors, and procurement teams across Oman and the GCC to request a formal RFQ for the Spirax Sarco TVA steam flowmeter. With engineering support in Muscat, Seven Star LLC supplies on request, provides the full Spirax Sarco technical datasheet on request, and connects buyers directly with our instrumentation division for sizing and installation guidance across saturated and superheated steam applications. Contact Seven Star LLC today to confirm lead times and pricing for your 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 TVA Steam Target Flowmeter

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

01What is the flow turndown of the Spirax Sarco TVA flowmeter?

The Spirax Sarco TVA delivers a 50:1 turndown at best-practice steam velocities, meaning a single meter accurately captures the complete steam flow range from minimum base load to peak process demand.

02Does the TVA wafer design reduce installation cost and downtime?

Yes. The wafer-style body fits directly between existing line flanges without requiring a dedicated spool piece, so installation is faster and process downtime is minimized compared with bulkier flanged primary elements.

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

The TVA is available in DN50, DN80 and DN100 wafer sizes compatible with EN 1092, BS 10, ASME, JIS and KS flanges. The body is stainless steel S.316 1.4408 CF8M with an Inconel X750 spring and multi-grade stainless steel internals.

04Can the TVA measure superheated steam as well as saturated steam?

Yes. The TVA measures saturated steam as standard and extends to superheated steam service when fitted with the dedicated pressure sensor kit, which isolates the sensor from direct process conditions via a high-pressure syphon assembly.

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.