TVA Flowmeters

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Accurate and reliable measurement of your entire steam flow.

Unlike alternative technologies, the TVA Flowmeter allows you to measure the complete flow range.

Capturing all steam used within your maximum and minimum flowrate, allowing accurate and comprehensive steam energy management. 

Measures your entire steam flow range.

50:1 turndown at best practice steam velocities. 

Highly accurate - measurement helps to identify energy saving and waste reduction opportunities. 

Easy integration and installation - within host control system and existing pipework. 

Long operating life - well proven and highly robust design gives excellent reliability. 

Low cost of ownership - with quick installation combined with excellent reliability.

TVA Flowmeter

TVA Flowmeter

Designed for use on saturated and superheated steam (with the dedicated pressure sensor kit) and operates on the target principle, by measuring the force produced on a moving cone by the fluid flow. This force is then converted into density compensated mass flowrate and is transmitted via a single loop powered 4 - 20 mA and pulsed output. TVA flowmeters also incorporate a totalised flow function and EAI 232C (RS 232) or EAI 485C (RS485) Modbus communications.

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Technical Information

Sizes and pipe connection


Technical data

DN50, DN80 and DN100


IP rating

IP65 with correct cable glands

The TVA flowmeter is of wafer design, suitable for fitting between the following flanges:


Power supply

Loop powered

EN 1092 PN16, PN25 and PN40


with optional RS485: 24VDC

BS 10 Table H


ASME B 16.5 Class 150 and Class 300



4-20mA (not available with RS485 option)

Japanese Industrial Standard JIS 20


Pulsed output (Vmax 28 Vdc Rmin 10 kW)

Korean Standard KS 20


Communication port

Modbus EIA 232C (RS 232C)

Note: Spirax Sarco TVA flowmeters should be installed in pipework manufactured to BS 1600, ASME B 36.10 Schedule 40 or EN 10216-2 / EN 10216-5 equivalent. For systems with different standards / schedules, please contact Spirax Sarco.


with optional RS485: EIA 485 (RS 485C)








Flowmeter body

Stainless steel S.316 1.4408 CF8M


431 S29 / S303 / S304 / S316


Inconel X750 or equivalent

Flowmeter stem

Stainless steel 300 series

Electronics housing

Aluminium LM25

Pressure sensing kit


Polyvinyl chloride (PVC)

Sensor housing

AISI 304 Stainless steel 1.4301


AISI 630 Stainless steel 1.4542

O' ring

Nitrile Butadiene Rubber (NBR)


AISI 431 Stainless steel 1.4057

High pressure syphon tube assembly


Carbon steel BS 3602: Part.1 1987 CFS 360 (zinc plated / passivated)



Carbon steel


PEEK/ Polymain

Typical Installation

Technical Documentation


TVA Flowmeter for Saturated and Superheat Steam Service

reference number





  1. Description
  2. Pressure/temperature limits
  3. Sizes and pipe connections


Download PDF

Installation Documentation

document language reference number download
Superheat kit for TVA flowmeters English IM-P192-07 Download PDF
TVA Flowmeter Commissioning Flow Chart English IM-P192-03 Download PDF
TVA Flowmeter Commissioning Flow Chart English IM-P192-15 Download PDF
TVA Flowmeter for Saturated and Superheated Steam English IM-P192-11 Download PDF
TVA Flowmeter for Saturated and Superheated Steam Service English IM-P192-02 Download PDF
TVA Flowmeter for Saturated and Superheated Steam Service Essential Installation Guide English IM-P192-04 Download PDF
TVA Flowmeter for Saturated and Superheated Steam Service with Version 9 Software Onwards English IM-P192-13 Download PDF
TVA Flowmeter for Saturated Steam Service English IM-P337-51 Download PDF

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