HOFFER-HFVT VORTEX FLOWMETER

Writer： admin Time：2021-03-08 17:43 Browse： ℃

1. Introduction
The HFVT is a Vortex flowmeters based on Van Karman theory of vortices generated by a bluff body in the pipe. The number of vortices are linearly proportional to the volumetric flow in the pipe. The HFVT is versatile flowmeter widely used for Gases, Steam & Liquid applications. There are no moving parts. The inline version comes with either flange or wafer version, while the insertion style comes in flange or hot-tapped connections. Standard configuration comes with local display indicating flowrate and total flow. Signal interface includes, 4-20mA, RS485, MODBUS etc. The electronics are designed to filter out erroneous signals as well as noise due pipe vibration.

2. Technical features:
♦ Low voltage loss, low power consumption.
♦ Converter with temperature and pressure compensation function.
♦ No moving parts, high reliability and long service life.
♦ Simple structure, easy to use, install and maintain.
♦ Wide measurement temperature range: can measure -30 ~ 350°C medium.
♦ Good repeatability, no zero drift.
♦ Wide measuring range: the measuring range ratio can reach 20:1.
♦ Measurement medium: high temperature, high pressure, gas, liquid and other media can be measured.
♦ High accuracy: ±0.5%, ±1.0%, ±1.5%.
 
3. Parameter specifications:
♦ Process connection: flange type (pipe type, insert type)
                                    Clip type (pipe type)
♦ Measurement temperature: -30 ~ 350°C (no display type)
                                               -15 ~ 60°C (LCD type)
♦ Working pressure: 64 barg(930PSIG)
♦ Measuring range: due to pressure, temperature, gas, liquid and other characteristics will be different
                                Liquids: ≤0 ~ 40 ft /s (0 ~ 12m/s)
                                Gas: ≤230 FPS (70m/s)
♦ Measurement accuracy: Liquid: ±0.5%
                                          Gas: plus or minus 1.0%
♦ Reproducibility: Liquid: ±0.15%
                            Gas: plus or minus 0.33%
♦ Protection grade: IP65; IP67; IP68
♦ explosion-proof level: Exid Ⅱ B T4; T4 Exib Ⅱ C
♦ Signal unit: transmission range 30 feet (10M)
                     Weight: clamping type: 10 kg ~ 12.8 kg (to DN300)
                     Plug-in type: 15 Kg
                     Note :- flange weight will be determined according to the technical parameter table
                     Material: Measurement tube: 304 stainless steel
                     Flange: carbon steel
♦ Range ratio: 20:1
♦ Signal output: pulse, 4 ~ 20mA, RS485, HART
♦ Lithium electromagnetic, 3.6VDC
♦ Power supply: 110/220 VAC, 14-36 VDC
 
4. Selection coding table:

HFVT meters
Example:HFVT-23-15D-11N-IN (0-20,000 kg/hr)
HFVT-	**	**	- **	**	- **	**	**	- **	**		Description
Flanged	1										Style
Wafer	2
Insertion- fixed	3
Insertion- with ball valve mounting assembly	4
Liquid		2									Fluid
Gas		3
Steam		4
½" (15mm)			015								Line Size
¾" (20mm)			020
1" (25mm)			02
1 ¼" (32mm)			03
1 ½' (40mm)			04
2" (50mm)			05
2 ½" (65mm)			06
3" (80mm)			08
4"-57" (100mm-1500mm)			**
With digital display (standard only)				D							Display
No display				N
24VDC					1						Power Supply
3.6V lithium battery					2
Dual power supply (24VDC, 3.6V lithium battery)					3
No output						0					Signal Output
Pulse output						1
Two wire 4-20mA DC output						2
Three wire 4-20mA DC output						3
RS-485 Communication						4
Hart Communication						5
Standard -40~480 °F (-40~250 °C)							N				Fluid Temperature
High Temp 480~660 °F (250~350 °C)							H
230 psig (16 bar)								1			Pressure
360 psi (25 bar)								2
580 psi (40 bar)								3
930 psi (64 bar)								4
Non									N		Explosion - Proof
Explosive Isolated									G
Intrinsically safe									B
Flow range											Flow rate