Variable Area Flowmeter

Variable Area Flowmeter

GENERAL INFORMATION

Variable Area flow meters measure the volumetric flow of liquids and gases. This technology is based on the variable area principle, where flow raises a float in a tube, increasing the area for the passage of the fluid through the meter.

BRIEF INTRODUCTION

Variable area flowmeter is a simple, reliable, and inexpensive flow-measuring instrument. As a gas or liquid is introduced into a uniformly tapered flow tube a float rises, its weight supported by the fluid flowing underneath, until the entire volume of fluid can flow past the float. The position of the float corresponds to a point on the tube’s measurement scale and provides an indication of the fluid’s flow rate.

ADVANTAGES
-Mechanical display and LCD
-Robust and universal
-The short-stroke design allows the measurement of a high flow rate using a relatively short metering tube
-Special application is for hazardous, dangerous, or aggressive fluid, for high temperature and high-pressure rates
-All stainless steel design provides a safe measurement of a variety of liquids, gases, and steam
-The measuring section can be equipped with a heating jacket
-Standard rotameter is mounted in a vertical pipeline with flow direction upwards

MAIN SPECIFICATIONS

Diameter DN15-DN200
Measuring Range Water (20 C): 1-200000 L/h
Air(20 C, 0.1013 MPa): 0.03-6000m³/h
Range Ratio 10:1; special 20:1
Accuracy ±1.0% for liquid; ±1.5% for gas
Ambient Temperature Pointer type: -40℃~+85℃
Remote: +40℃~+85℃ (liquid crystal is not damaged)
-30℃~+80℃(liquid crystal is able to operate)
Medium Temperature SS304: -40℃~+100℃
PTFE: 0℃~100℃
High Temp.: 110℃~+450℃
Nominal Pressure DN15-DN50≤4.0MPA; DN80-DN20≤1.6MPa (common)
DN15-DN50≤32MPa; DN80-DN200≤16MPa (special)
Pressure Loss 7kPa- 70kPa
Viscosity DN15<5mPa.s: < 30mPa.s
DN25<250mPa.s
DN50-DN150<300mPa.s
Protect Level IP65
Output Pulse, 4-20mA, flow rate alarm
Alarm Output H& L Alarm
Switch value(1A@ 30V DC)
Relay output (1A@ 30V DC or 0.25A @ 250V AC or 0.5@ 125V AC)
Communication RS232, RS485, HART
Power Supply 4-20mA 24V DC (12V DC- 32V DC) 2 wires system
Alarm type: 4-20mA 24V DC (18V DC- 28V DC) 4 wires system
85- 265V AC 50Hz
Battery: 3.6V@ 7.5 AH (lithium)
Process Connection Flange (DIN, ANSI, JIS, etc.)
Sanitary Tri-clamp Type
Explosion-proof Exia II CT5Ex
Exd II BT6
PRODUCT PHOTOS