TVA Steam Flowmeter

Target Flowmeter

Overview

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
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.

Sizes and pipe connections

DN50, DN80 and DN100
The TVA flowmeter is of wafer design, suitable for fitting between the following flanges:
EN 1092 PN16, PN25 and PN40
BS 10 Table H
ASME B 16.5 Class 150 and Class 300
Japanese Industrial Standard JIS 20
Korean Standard KS 20

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.

Technical data

IP rating	IP65 with correct cable glands
Power supply	Loop powered
Power supply	with optional RS485: 24VDC
Outputs	4-20mA (not available with RS485 option)
Outputs	Pulsed output (Vmax 28 Vdc Rmin 10 kW)
Communication port	Modbus EIA 232C (RS 232C)
Communication port	with optional RS485: EIA 485 (RS 485C)

Outputs 4-20mA (not available with RS485 option) Pulsed output (Vmax 28 Vdc Rmin 10 kW) Communication port Modbus EIA 232C (RS 232C) with optional RS485: EIA 485 (RS 485C)

Materials

Unit	Part	Material
TVA	Flowmeter body	Stainless steel S.316 1.4408 CF8M
	Internals	431 S29 / S303 / S304 / S316
	Spring	Inconel X750 or equivalent
	Flowmeter stem	Stainless steel 300 series
	Electronics housing	Aluminium LM25
Pressure sensing kit	Cable	Polyvinyl chloride (PVC)
	Sensor housing	AISI 304 Stainless steel 1.4301
	Sensor	AISI 630 Stainless steel 1.4542
	O’ ring	Nitrile Butadiene Rubber (NBR)
	Adaptor	AISI 431 Stainless steel 1.4057
High pressure syphon tube assembly	Tube	Carbon steel BS 3602: Part.1 1987 CFS 360 (zinc plated / passivated)
	Valve	Body	Carbon steel
		Seat	PEEK/ Polymain