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KY Instrument Positive Displacement (Birotary) Flow Meter
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KY Instrument Positive Displacement (Birotary) Flow Meter

LS Type birotary flowmeter is a kind of positive displacement flowmeter, there are a pair of helical rotors with special teeth which meshed completely during operation. It has features of high accuracy, high reliability, wide flow range, low fluctuati…

Product Overviews

LS Type birotary flowmeter is a kind of positive displacement flowmeter, there are a pair of helical rotors with special teeth which meshed completely during operation. It has features of high accuracy, high reliability, wide flow range, low fluctuation and low noise etc.. It is widely used in custody transfer and internal transfer of oil and oil products.


Structure & Principle

The LS series birotary flowmeter has a pair of helical rotors in a birotary flowmeter, each rotor has four teeth, the teeth of the two rotors in one flow meter are in reverse direction. The measuring chamber is formed by the tooth slot and the case Due to the pressure differential between inlet and outlet, the rotors rotates a certain angle on the same plane. Any cross-section of the two rotors are as figure shows. Since same rotating torque results in same rotation angle, there is no relative slide between the two rotors. The rotation is isokinetic and isometric, and the discharge is even without fluctuation. One rotation discharges 8 times volume of the measuring chamber, therefore, the volumetric total flow of the liquid passed through the flowmeter can be obtained by totalizing the number of rotation.

111 BR structure.jpg

Features And Functions


● High accuracy, wide flow range( bigest of the PD flow meters), good repeatability;

● Rotation is stable, there is no pressure fluctuation with the fluid in the pipeline, the noise is low;

● The viscosity range of the measured medium is wide, it works better with high viscosity medium;

● The two rotors are not in need of the synchronous gear driving, the structure is simple and compact;

● The magnetic seal structure is reliable, the driving torque is strong;

● The flowmeter is provided with optoelectronic pulse transmitter which makes remote

measurement possible;

● The fluid state has little influence to the flowmeter, straight pipe is needed neither upstream nor downstream of the flowmeter.


Optional accessories

l  Air eliminator

l  Strainer

l  Integrated air eliminator and strainer

Technical Parameters

Nominal Diameter:

DN40 ~ DN300mm

Nominal Pressure:

PN1.6 ~ 6.3MPa

Medium:

Liquids of Petroleum  products, chemical products

Medium Temperature:

-20℃~100℃

Ambient Temperature:

-20℃~55℃

Body Material:Carbon steel/ Stainless steel
Accuracy: ±0.2%, ±0.5%

Viscosity:

0.5~500mPa.s

Flow Range:

2.5~410m3/h

Power Supply: 24V. DC or 12V. DC
On-site Indication:

Mechanical dial (mechanical counter)/
Backlit LCD digital display(Instantaneous flow + total)

Ex-protection:ExdⅡBT4
Housing protection:Equivalent to IP54



Performance Parameters

 

   


Birotary   Flow Meter

Accuracy

±0.5%

±0.2%±0.1%

 Viscosity

(mPa·s)

0.5~2

>2~6

>6~150

>150~500

0.5~2

>2~6

>6~150

>150~500

N.   Bore

Op.Condi.

Flow   Range (m3/h)

40

Contin.

6~20

3~25

2.5~25

2~20

7~20

5~25

4~25

2.5~20

Broken

7~27

4~30

3~30

2.5~25

8~27

6~30

5~30

3~25

50

Contin.

9~30

5~40

4~40

3.5~35

10~30

8~40

7~40

4.5~35

Broken

12~45

7~50

5~50

4.5~45

15~45

10~50

8~50

6~45

80

Contin.

20~77

12~100

8~100

6~90

25~77

20~100

16~100

10~90

Broken

20~110

12~120

8~120

7~110

36~110

24~120

12~120

11~110

100

Contin.

28~110

18~150

15~150

6~130

36~110

30~150

26~150

15~130

Broken

28~150

18~180

15~180

6~150

50~150

36~180

30~180

15~150

150

Contin.

50~180

30~250

20~250

11~240

60~180

50~250

31~250

26~240

Broken

50~270

30~300

20~300

11~280

90~270

60~300

33~300

30~280

200

Contin.

70~260

40~340

30~340

15~320

85~260

68~340

43~340

35~320

Broken

70~380

40~400

30~410

15~390

85~380

80~400

50~410

43~390

250

Contin.

100~380

60~500

40~500

20~400

120~380

100~500

60~500

40~400

Broken

100~550

60~590

40~590

20~550

100~550

100~590

60~590

40~550

300

Contin.

140~630

100~800

70~800

50~800

200~630

160~800

100~800

70~800

Broken

140~900

100~950

70~950

50~900

200~900

160~950

100~950

70~900

 

 


Industry Applications



● Oil feild( crude oil)

● Oil Pipelines( refined oil)

●  Custody transfering of refined oils or edible oils

●  Refinery, Chemical plants

●  Bulk loading of tanks, ships, planes and trucks

●  Measurement or monitoring of the production process of beverage and alchool





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