WKGB Vortex Flow Meter DN20–DN300

Overview

The WKGB vortex flow meter uses the Karman vortex-shedding principle to measure liquids, gases and steam in pipe sizes DN20–DN300. Accuracy is ±0.5 of reading on liquids and ±1.0 / ±1.5 on gas and steam with a 1:10 or 1:15 turndown, and the meter outputs either a pulse signal (0.1~3000Hz) or a 4~20mADC two-wire current.

The flow body is 1Cr18Ni9Ti stainless steel with pressure ratings of PN1.6MPa, PN2.5MPa and PN4.0MPa, and medium temperature versions of -40~+250℃ and -40~+350℃ cover saturated and superheated steam duties. With no moving parts and a pressure-loss coefficient Cd<2.6, the WKGB is a robust alternative to orifice metering. Installation forms include wafer (flange-clamped), flanged, and integrated or split versions with temperature and pressure (T&P) compensation for direct mass/standard-volume measurement of steam and gas. A 3.6V lithium battery field-display version runs for ≥5 years per the feature text, and the totalizer is protected in EEPROM for around 10 years.

Features

• No moving parts; pressure-loss coefficient Cd<2.6
• Liquid accuracy ±0.5 of reading; gas/steam ±1.0, ±1.5; turndown 1:10 / 1:15
• Five forms: wafer, flanged, flanged integrated with T&P compensation, integrated with T&P compensation, split set with T&P compensation
• Pulse output 0.1~3000Hz (low level ≤1V, high level ≥6V) or 4~20mADC two-wire
• Supply +12VDC(+24VDC), +24VDC, or 3.6V lithium battery (field display type, ≥5-year battery)
• Explosion-proof ExdIIBT6, IP65 protection, vibration tolerance 1.0g, cable entry M20x1.5
• EEPROM totalizer data protection ~10 years

Specifications

Item	Value
Model / series	WKGB
Principle	Karman vortex shedding
Nominal diameter	DN 20, 25, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300
Body material	1Cr18Ni9Ti
Pressure rating	PN1.6MPa, PN2.5MPa, PN4.0MPa
Medium temperature	-40~+250℃ / -40~+350℃
Ambient conditions	-10~+55℃, RH 5%~90%, 86~106kPa
Accuracy	Liquid ±0.5 of reading; gas/steam ±1.0, ±1.5
Turndown	1:10, 1:15
Pressure-loss coefficient	Cd<2.6
Outputs	Pulse 0.1~3000Hz (low ≤1V, high ≥6V); 4~20mADC 2-wire
Power supply	+12VDC(+24VDC), +24VDC, or 3.6V lithium battery (field display type)
Signal cable	STVPV 3×0.3 (3-wire) / 2×0.3 (2-wire), length ≤500m; entry M20x1.5
Explosion protection / ingress	ExdIIBT6; IP65
Vibration tolerance	1.0g
Totalizer protection	EEPROM, ~10 years

Installation forms

Form	Description
Wafer (flange-clamped)	Compact, clamped between pipe flanges
Flanged	Standard flanged spool
Flanged integrated, T&P compensation	Built-in temperature & pressure compensation
Integrated, T&P compensation	One-piece meter with T&P compensation
Split set, T&P compensation	Remote converter with T&P compensation

Applications

• Saturated and superheated steam metering (with T&P compensation)
• Compressed air and industrial gas measurement
• Liquid flow measurement where moving-parts meters wear out
• Hazardous areas requiring ExdIIBT6 explosion-proof equipment

FAQ

Can the WKGB measure steam?

Yes. Versions rated -40~+250℃ and -40~+350℃ cover steam duties, and the T&P-compensated forms (integrated, flanged integrated, or split set) correct for temperature and pressure variation in steam and gas measurement.

Does it work without external power?

Yes — the field display type runs on a 3.6V lithium battery with a battery life of ≥5 years per the product feature text, and the totalizer reading is protected in EEPROM for around 10 years.

How do I get a quote?

Contact us with your medium (liquid/gas/steam), pipe size, working temperature/pressure and flow range; we respond within 24 hours.