flow meter for petroleum process of high viscosity

Specifications high viscosity petroleum flow meter

1. high precision

2. Long life

3. stable performance

4.suitable for high viscosity

flow meter for petroleum process of high viscosity     Summary LBTC positive displacement rotary vane flow meter belongs to positive displacement meter and is one of the most accurate measuring meters for measuring liquid of modern industry. The flow meter has stable performance and is insensitive to flow state change of upstream medium and change of medium viscosity. It has high measuring accuracy,good applicability and long life. Now it has widely used for every field such as process control of modern industry and trade settlement, etc. Operation Principle
There are two or three couples of rotary vanes, they slide radially along grooves in the barrel-type rotor. With
the action of flowing pressurized fluid, pushing the rotary vanes and the rotor rotates around its axis. Rotary vanes
continuously divide the flowing fluid into an individual volume, using drive gear and counting mechanism calculate and indicate the total delivery of the fluid. The process as follows: when the rotary vanes are at the state as figure 1.1,vane A and D stretch out from the rotor and contact the inwall of measuring chamber while vane B and C retract back completely into rotor. With the fluid entering into the meter, it pushes the vanes and the rotor rotating clockwise. When the rotor and vanes run 1/8 circle, the vanes stop at the position as shown in figure 1.2, vane A stretches completely, vane D begins to retract back, vane C is still in completely contraction state, while vane B begins to stretch out. When the rotor and the vanes run a 1/4 circle, the vanes are in the positions as shown in figure 1.3. The vane A and B both completely stretch out, the space which is composed of the two vanes, rotor, the meter case bore, the upper cover and lower cover is full of measuring fluid. When the rotor and the vanes are in the position as shown in figure 1.4, the fluid in the space begins to be released with the vane A withdrawing gradually. Meanwhile, the vane C begins to stretch out, another new exactly measuring fluid volume between the vane B and C begins to form gradually. So when four vanes rotate around the whole circle is 4 times of volume. ( the meter has three pairs vanes, 6 space volumes will be drained) it realizes fluid measurement.         Main technical parameters   1.Intrinsic Error:0.2%;0.5% 2.Nominal Diameter (mm):25mm;50mm;80mm;100mm;150mm;200mm;250mm;300mm; 3.Nominal Pressure:2.5MPa;4.0MPa; 6.4MPa;
4.Flow Rate Range:  

Nominal Diameter	25		50		80		100		150		200		250		300
Intrinsic Error %	0.2	0.5	0.2	0.5	0.2	0.5	0.2	0.5	0.2	0.5	0.2	0.5	0.2	0.5	0.2	0.5
Min. Flow m3/h	3	1	8	5	25	18	35	25	60	40	100	80	120	110	300	200
Max. Flow m3/h	6	8	20	35	65	80	90	115	120	150	180	240	350	550	900	1000

  5.Operation Temperature: -20.C ~ +250.C;(special temperature should indicate.)
6.Fluid Viscosity: 0.6~500mPa.s ( kinematic viscosity)
7.Pressure loss: no more than 0.1MPa(such as nominal diameter is DN80)
8.Min. Indication Unit: For equipped with mechanical header, subject to the model of selected header.
For equipped with intelligent header: 0.001m3
9. Integrated Flux: For equipped with mechanical header, subject to the model of selected header.
For equipped with intelligent header: 99999.9999 m3
10. Coefficient of theoretical instrument: only for equipped with intelligent meter.  

Nominal diameter DN	25	50	80	100	150	200	250	300
Coefficient of theoretical instrument N/L	18.868	6.993	3.657	2.357	1.634	1.483	0.841	0.563

        Model Selection Table  

Model	Code					Code meaning
LBTC-						Positive displacement rotary vane flow meter
	25					Nominal diameter:DN25mm
	50					Nominal diameter:DN50mm
	80					Nominal diameter:DN80mm
	100					Nominal diameter:DN100mm
	150					Nominal diameter:DN150mm
	200					Nominal diameter:DN200mm
	250					Nominal diameter:DN250mm
	300					Nominal diameter:DN300mm
		Q				House material: nodular cast iron
		C				House material: carbon steel
		P				House material: 304
			2.5			Nominal Pressure: 2.5MPa
			4.0			Nominal Pressure:4.0MPa
			6.3			Nominal Pressure:6.4MPa
				JX		With mechanical counter, local indication.
				BS		With mechanical counter,  remote signal transmitted with pulse transmitter
				ZN1		With intelligent instrument, local indication; remote signal transmitted with pulse transmitter.
				ZN2		With intelligent instrument, local indication with    4~20mA signal output.
				ZN3		With intelligent instrument, local indication with 4~20mA signal output and remote signal transmitted with pulse signal transmitter
					i	Intrinsically safe: ia IICT5 (for intelligent meter or pulse signal transmitter)
					d	Explosion isolation: d IIBT4 (for intelligent meter or pulse signal transmitter)
LBTC-

        1. counter 2. transmitter 3. precision adjusting mechanism
4. flow transmitter 5.external precision adjustment device