Types of V Cone Flow Sensor, V Type Flow Meter

 V type flowmeter working principle:
The V-type flowmeters is a differential pressure flowmeters, it get differential pressure to reflect flow rate through throttle. Throttling set is a cone a hanging in the pipeline central. High pressure the static pressure upstream pH (positive pressure) gets from the wall before the cone, low pressure(the pressure downstream) PL (negative pressure) gets from cone central, square root of the differential pressure DP is proportional to the flow.

Main technique parameter of LGVH flow sensor
Accuracy: ± 0.5% (DP transmitter accuracy should be ≥ 0.2)
(β : 0.45 ~ 0.85, when β < 0.55 and range turn down 4: 1, the accuracy is 0.30)
The repetibility: ± 0.1%
Working pressure: 16 MPa, the biggest pressure can up to 42MPa;
Working temperature: -40~700ºC
The environment temperature: -40-65ºC
Straight pipe installation requirements: Upstream 0~3D straight pipe, downstream 0~1D straight pipe.
Wide measure range: 10: 1(standard)
Small pressure loss: The same β Valve, the pressure loss only 1/3~1/5 of orifice plate.

Applicable medium: V cone flow sensor is suitable for almost all the gas and liquid medium.

Successful flow measurement of liquid types:
Gas
Gas: Coke oven gas, blast furnace gas, converter gas, mixed gas, etc;
Natural gas: Including natural gas which moisture content more than 5%;
Various hydrocarbon gas: Alkane and olefin gas, etc;
Various gas manufacturing: Hydrogen, helium, argon, oxygen, nitrogen, etc;
Corrosive gas: Wet chlorine gas, etc;
Air: Including wet and dust air, compressed air etc;
Flue-gas: Flue gas emissions from all kinds of boiler, heating furnace;

Steam: Saturated steam and superheat vapor;
Liquid
Oil: Crude oil, fuel oil, aqueous emulsified oil, diesel oil and so on;
Water: Raw water, drinking water, production water, sewage etc;
Various water solution: Various acid, alkali, salt water solution etc.
Organic chemicals: Methanol, ethylene glycol, and xylene etc.

Special fluid:
Oil + HC gas +sand
Aerated water: H20 + N2 + air; H20 + CO2 etc.

V cone flow sensor model selection parameters
Fluid name
Pipe inner diameter (mm)
Type selection of V cone flow sensor
Flow unit ( Kg/h, t/h, m3/h, Nm3/h)
At working condition
At standard condition
Normal flow
Minimum flow, max flow;
At working condition
At standard condition ( tell us the flow condition when the medium is gases)
Working pressure (MPa)
Absolute pressure
Gauge pressure
Medium temperature (ºC): Maximum, minimum and normal temperature
Medium density (kg/m3)
At working condition
At standard condition ( tell us the flow condition when the medium is gases)
Medium viscosity (PA. S)
Relative humidity
Gas composition
Volume percentage ( for mixed gas which contains two or more types gas)

Pipe device
Horizontal
Up to bottom
Piping flange
Tell us the flange form, size and rate;
Buyer provide flange drawing;
Due, coagulation. It is special used to measure dirty medium.

Diameter	flow resistance part	upstream	downstream
All	1 elbow	0D	0D
	2 elbow	0D	0D
	T-junction	0D	0D
	butterfly valve (control valve)	if not good condition, 10D	downstream 5D
	butterfly valve (stop valve)	3D	3D
	Ball valve ( stop valve)	3D	0D
	heat exchanger (accordingly)	3D	0D
	increasing coupling (0.67D-D ), length 2.5D	1D	0D
	reducing pipe (3D-1D), length 3.5D	1D	1D

Diameter	flow resistance part	upstream	downstream
All	1 elbow	3D	1D
	2 elbow	3D	1D
	T-junction	3D	1D
	butterfly valve (control valve)	if not good condition, 10D	downstream 5D
	butterfly valve (stop valve)	5D	3D
	Ball valve ( stop valve)	3D	1D
	heat exchanger (accordingly)	3D	0D
	increasing coupling (0.67D-D ), length 2.5D	5D	2D
	reducing pipe (3D-1D), length 3.5D	3D	1D