Can the TVA flowmeter be installed in vertical pipelines?

Yes, but only for saturated steam service up to 7 bar g and 170°C. For superheated steam or higher pressures, horizontal installation with electronics below the pipeline is required.

What straight pipe lengths are required upstream and downstream?

A minimum of 6 pipe diameters upstream and 3 diameters downstream is required. If installed after two 90° bends in different planes, a pressure reducing valve, or a partially open valve, increase upstream length to 12 diameters.

What additional components are needed for superheated steam service?

For superheated steam, a dedicated pressure sensing kit and 'U' syphon tube assembly are required in addition to the standard flowmeter body.

What is the measurement accuracy of the TVA flowmeter?

The system uncertainty is ±2% of measured value from 10% to 100% of maximum rated flow, and ±0.2% of full scale from 2% to 10% of maximum flow, in accordance with ISO 17025.

Can the flowmeter be installed outdoors?

No, the TVA flowmeter must not be installed outdoors where it can be exposed to driving rain or freezing conditions. The electronics housing is IP65 rated but not designed for outdoor exposure.

SPIRAX SARCO · STEAM FLOWMETERS

Spirax Sarco TVA Flowmeter for Saturated and Superheated Steam Service

Name: Spirax Sarco TVA Flowmeter for Saturated and Superheated Steam Service
Brand: Spirax Sarco

Spirax Sarco TVA steam flowmeter for saturated & superheated steam. DN50-DN100, up to 32 bar g. Available at PC Engineering India.

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Overview

The Spirax Sarco TVA flowmeter is a target-type mass flowmeter designed specifically for accurate measurement of saturated and superheated steam in industrial applications. It operates by measuring the force exerted on a moving cone by the fluid flow, then converting this force into a density-compensated mass flowrate output.

The TVA flowmeter features integrated electronics that provide a 4-20 mA loop-powered output, pulsed output, and Modbus communication (RS232 or RS485). A built-in LCD display shows real-time flow data, with an option for remote display using the M750 unit. The wafer-style body design allows installation between standard flanges including EN 1092, ASME B16.5, BS 10, JIS 20, and KS 20.

This flowmeter is suitable for steam system monitoring, energy management, and process control in manufacturing facilities where accurate steam flow measurement is critical for operational efficiency.

Key Features

Density-compensated mass flow output for accurate steam measurement
Suitable for both saturated steam (up to 32 bar g) and superheated steam (up to 23 bar g at 239°C)
Wafer design compatible with multiple flange standards (EN, ASME, BS, JIS, KS)
Built-in LCD display with optional remote display capability
Multiple outputs: 4-20 mA, pulsed output, Modbus RS232/RS485
Turndown ratio up to 50:1
System uncertainty: ±2% of measured value (10-100% of max flow)
IP65 rated electronics enclosure

Specifications

Parameter	Value
Sizes Available	DN50, DN80, DN100
Maximum Design Pressure	32 bar g @ 239°C
Maximum Operating Pressure (Saturated)	32 bar g
Maximum Operating Pressure (Superheated)	23 bar g @ 239°C
Minimum Operating Pressure	0.6 bar g
Maximum Operating Temperature	239°C (saturation)
Minimum Operating Temperature	0°C (non-freezing)
Electronics Ambient Temperature	Max 55°C
IP Rating	IP65
Power Supply	Loop powered (24 VDC with RS485 option)
Body Material	Stainless Steel S.316 (1.4408 / CF8M)
Spring Material	Inconel X750 or equivalent
Electronics Housing	Aluminium LM25
System Uncertainty	±2% (10-100% flow), ±0.2% FSD (2-10% flow)
Turndown Ratio	Up to 50:1
Flange Compatibility	EN 1092 PN16/25/40, ASME B16.5 Class 150/300, BS 10 Table H, JIS 20, KS 20
Size	Max Flow @ 10 bar g	Min Flow @ 10 bar g	Pressure Drop
DN50	1,395 kg/h	28 kg/h	750 mbar
DN80	3,581 kg/h	72 kg/h	498 mbar
DN100	5,581 kg/h	112 kg/h	498 mbar
Size	Body Width (A)	OD	Weight (TVA)	Weight (Superheat Kit)
DN50	35 mm	103 mm	2.67 kg	0.3 kg
DN80	45 mm	138 mm	4.38 kg	0.3 kg
DN100	60 mm	162 mm	7.28 kg	0.3 kg

Applications

The Spirax Sarco TVA flowmeter is used across industries where steam flow measurement is essential:

- Power Plants — Monitoring steam consumption and distribution - Refineries & Petrochemical Plants — Process steam metering - Pharmaceutical Manufacturing — Steam usage tracking for validation - Food & Beverage Processing — Energy management and cost allocation - Textile Mills — Steam consumption monitoring for dyeing and finishing - Paper & Pulp Mills — Process steam flow measurement - Chemical Plants — Steam flow monitoring for reactors and heat exchangers

Frequently Asked Questions

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Contact PC Engineering for pricing, availability, and technical support for the Spirax Sarco TVA Steam Flowmeter. Call us or fill in our inquiry form — our engineers will respond within 24 hours.

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