Product Overview

The CST-VXW series is engineered to cover a broad span of pipe sizes, process connections and output configurations, allowing a single product platform to serve liquid, gas and steam applications across light industry, process industry and utility metering.

Connection / Body Styles

• Flange type (DN15–DN300): full-bore flanged meter body for permanent in-line installation, offered as standard to DIN PN16 flange connections (other flange standards available on request).
• Wafer type (DN15–DN300): compact, lightweight body clamped between existing line flanges — a cost-effective option where installation space is limited.
• Insertion type (DN80–DN2000): probe-style sensor for hot-tap installation on large-diameter pipework, suited to utility and large process lines without requiring the line to be cut.
• Thread / sanitary type (DN15–DN100): small-bore threaded or hygienic tri-clamp connections for compact piping and sanitary process lines.

Transmitter Configuration

• Integral (compact) type: electronics housing mounted directly on the sensor body — a self-contained, easy-to-install unit.
• Remote type with temperature & pressure compensation: electronics housing mounted separately from the sensor, with built-in compensation for temperature and pressure to output true mass or standard-volume flow, particularly for saturated and superheated steam service.

Materials & Certification

• Wetted materials: SS304 stainless steel as standard, with SS316 available as an option for corrosive or higher-purity service.
• Hazardous area rating: ATEX Ex ia IIC T5 Ga, for use in explosive atmospheres where certified equipment is required.

Electrical Output

• Signal output: 4–20 mA analogue output plus pulse output, standard on all variants.
• Digital communication: HART protocol or RS485 (Modbus) — selectable at time of order.

 Features

• No moving parts: the Karman vortex-shedding principle requires no moving mechanical parts in the flow path, giving high long-term reliability and minimal maintenance.
• Multi-medium measurement: a single meter platform measures liquid, gas and both saturated and superheated steam.
• Wide rangeability: liquid velocity range of 0.4–7.0 m/s, gas velocity range of 4.0–60.0 m/s and steam velocity range of 5.0–70.0 m/s, giving a wide usable turndown for varying process loads.
• High accuracy: ±1.0% of reading for flange/wafer types and ±1.5% of reading for insertion types.
• Mass-flow capability: optional integrated temperature and pressure compensation delivers direct mass or standard-volume flow output for steam and gas applications, removing the need for separate compensation instruments.
• Flexible outputs: 4–20 mA plus pulse output as standard, with a choice of HART or RS485 Modbus digital communication for integration with DCS/SCADA/PLC systems.
• Wide process range: process temperature from –40°C to +250°C as standard, extending to +350°C with the high-temperature variant; nominal pressure ratings of 0.6, 1.0, 1.6, 2.5 and 4.0 MPa.
• Vibration tolerant: rated for vibration acceleration up to 0.2 g, with installation guidance available for high-vibration pipelines.
• Hazardous-area ready: ATEX Ex ia IIC T5 Ga explosion-proof certification available for installation in classified zones.
• Flexible power options: line-powered (DC 12–30 V) or battery-powered (3.6 V lithium) for remote or unpowered metering points.
• Broad size coverage: DN15–DN300 for flange/wafer types and DN80–DN2000 for insertion types, covering small utility lines through to large main pipework.
• Corrosion-resistant construction: SS304 standard wetted parts, with SS316 available for demanding process media.

Technical Parameters

Basic Technical Parameters

Standard Flow Range Reference (Flange / Wafer Type, DN15–DN300)

The table below gives indicative flow ranges for the flange and wafer body styles; the insertion type covers DN80–DN2000 with ranges determined by installation and pipe conditions.

Saturated Steam Mass Flow Range (kg/h)

Reference mass-flow range (minimum Qmin to maximum Qmax) by nominal size and steam absolute pressure, for saturated steam service.

Overall Dimensions — Flange Connection (DIN PN16 reference)

Note: dimensions are given in millimetres for the DIN PN16 flanged configuration; wafer, insertion and alternative flange standards are available on request.

Industry Application

With its ability to measure liquid, gas and steam within a single product platform, and its option for temperature/pressure-compensated mass-flow output, the CST-VXW Vortex Flow Meter is suited to a wide range of industrial metering applications, including:

• Power generation & boiler plants: saturated and superheated steam mass-flow measurement for boiler efficiency monitoring, steam distribution metering and heat-energy accounting.
• Oil, gas & petrochemical: flow measurement of process gases, compressed air and hydrocarbon liquids in refining, processing and pipeline metering points.
• Chemical & petrochemical processing: monitoring of process liquids and gases, with SS316 wetted parts available for corrosive media.
• HVAC & utility energy management: compressed air, steam and hot/chilled water metering for plant utility monitoring and energy accounting.
• Food, beverage & pharmaceutical: sanitary/thread connection variants for hygienic process lines and utility metering in regulated production environments.
• Water & wastewater treatment: liquid flow measurement across treatment and distribution processes.
• Metallurgy, cement & heavy industry: high-temperature gas and steam flow monitoring in furnace, kiln and process heating applications.

For hazardous-area installations, the ATEX Ex ia IIC T5 Ga certified variant extends this coverage to classified zones across the above industries.