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LLQ-Gas Roots Flow Meter

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Gas Roots Flow Meter

It is integrated with flow, temperature & pressure detection of intelligent flow meter. Gas roots flowmeter is a new generation flow meter, which can execute automatic compensation of temperature and pressure. This flow meter is based on volumetric measurement theory and designed for accurately measuring the total amount of gas in a pipeline. The flowmeter is composed of two parts: roots flow sensor and flow totalizer. It takes advanced single-chip microcomputer technology & micro-power high-tech, meanwhile, it can be set medium pressure inside, with temperature automatic tracking compensation calculation, can directly to display total volume flow under standard status( P0=101.325kPa, T0=293.15K).

This flow meter is followed standard of the People's Republic of China Machinery Industry Standard JB/T7385-94 "Gas Roots Flowmeter" and our standard of Q/ZCY 05-2002LLQ Gas Roots Flowmeter.

 

LLQ-Gas Roots Flow Meter

001   003  004

DESCRIPTION

It is a positive displacement, rotary type gas meter designed for continuously measuring and indicating the accurate measurement of gas in a pipeline. Gas Roots flow meters are suitable for handling most types of clean, dry, common gases at either constant or varying flow rates. Meters of standard construction are not directly suitable for handling acetylene, biogas or sewage gas. Contact the factory for information on specially constructed meters made of materials directly compatible with these and other gases.

 

APPLICATION

For some gas industry business accounting which used in some fields,like, restaurant, hotels, gas pressure regulation station, civil

boiler, etc. Also available to measure some gases like, propane, nitrogen and others which have not corrosive mediums.


01 02 03 04

TECHNICAL DATA

Connection

DIN PN16

Accuracy

±1.5% of rate

±1.0% of rate

Condition

Fluid Temperature:-10...+60℃

Ambient Temperature:-30...+60℃

Relative Humidity:5%-90 % RH

Atmospheric Pressure:86...106Kpa

Power Supply

Main Power:24V DC

Backup Battery:3.6V DC Lithium Battery

Power Consumption

<1W

Output

Pulse

4-20mA

IC card

Modbus RS485


SPECIFICATION

Model

Suffix Code

Description

LLQ-

Gas Roots Flowmeter

Diameter

XXX






025:DN25

100:DN100

250:DN250

Flow Range

Q-XX





Refer to table

Converter Type

N




Basic Meter:Mechanical display without output

C




Digital display;Temperature and pressure compensation;Pulse;4-20mA;

OptionalModbus RS485;Control signal for IC card

D




Digital Display;Automatic Temperature and pressure compensation

Standard out:4-20mA/Pulse/Control signal for IC card

Optional:Modbus RS485

Accuracy

10



±1.0% of rate

15



±1.5% of rate

Pressure Rating

WP1


1.0Mpa

WP2


1.6Mpa

Connection

DXX

D16:DIN PN16 Flange;D25:DIN PN25 Flange;DN40:DIN PN40 Flange...

AXX

A15:ANSI 150# Flange;A30:ANSI 300# Flange;A60:ANSI 600# Flange...

JXX

J10:JIS 10K Flange;J20:JIS 20K Flange;J40:JIS 40K Flange...


FLOW RANGE

Diameter

Model

Start Rate

Max Flow Rate

Pressure Loss

Pressure Rate

Accuracy

Turndown Ratio

Body Material

m³/h

m³/h

Pa

Mpa

DN25

Q-16

0.6

16

120

1.0/1.6

1.5/1.0

20:1

 

Aluminum Alloy

DN40

Q-20

0.6

20

130

1.0/1.6

1.5/1.0

20:1

Q-25

0.6

25

130

1.0/1.6

1.5/1.0

20:1

Q-30

0.6

30

130

1.0/1.6

1.5/1.0

20:1

Q-40

0.6

40

180

1.0/1.6

1.5/1.0

30:1

Q-60

0.6

60

180

1.0/1.6

1.5/1.0

60:1

DN50

Q-20

0.6

20

140

1.0/1.6

1.5/1.0

20:1

Q-25

0.6

25

140

1.0/1.6

1.5/1.0

20:1

Q-30

0.6

30

140

1.0/1.6

1.5/1.0

20:1

Q-40

0.6

40

200

1.0/1.6

1.5/1.0

30:1

Q-60

0.6

60

200

1.0/1.6

1.5/1.0

60:1

Q-85

0.6

85

210

1.0/1.6

1.5/1.0

70:1

DN65

Q-100

0.6

100

220

1.0/1.6

1.5/1.0

70:1

Q-140

0.6

140

220

1.0/1.6

1.5/1.0

120:1

DN80

Q-100

0.8

100

220

1.0/1.6

1.5/1.0

70:1

Q-140

0.8

140

240

1.0/1.6

1.5/1.0

100:1

Q-200

0.8

200

240

1.0/1.6

1.5/1.0

100:1

DN100

Q-300

0.8

300

280

1.0/1.6

1.5/1.0

110:1

Q-450

0.8

450

300

1.0/1.6

1.5/1.0

110:1

DN150

Q-650

10

650

580

1.0/1.6

1.5/1.0

80:1

Cast lron

Q-1000

10

1000

600

1.0/1.6

1.5/1.0

80:1

DN200

Q-1600

20

1600

850

1.0/1.6

1.5/1.0

60:1

DN250

Q-3000

30

3000

1050

1.0/1.6

1.0/1.6

40:1

 


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