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Introduction

principle

The metering box, a pair of oval gears installed in the metering box, and the upper and lower cover plates form a sealed crescent-shaped cavity (due to the rotation of the gears, so it is not absolutely sealed) as the calculation unit of primary displacement. When the liquid to be measured enters the flowmeter through the pipeline, the pressure difference generated at the inlet and outlet pushes a pair of gears to rotate continuously, and continuously transports the liquid measured by the lunar cavity to the outlet. The product of four times the secondary displacement is the total amount of liquid flow to be measured.

structure

The oval gear flowmeter consists of a flow transmitter and a counting mechanism. A radiator is installed between the transmitter and the counting mechanism to form a high temperature flowmeter. The transmitter consists of a measuring chamber equipped with a pair of oval gear rotors and a sealed coupling, and the counting mechanism includes a deceleration mechanism, an adjustment mechanism, a counter, and a transmitter.

application

Suitable for asphalt, lubricating oil, vegetable oil, diesel oil, petroleum, residual oil, kerosene, motor oil, gasoline, heavy oil, fuel oil, heat transfer oil, crude oil, light oil, insulating oil, hydraulic oil, etc.

technical parameter

Nominal diameter: (mm)DN10~DN200
Measured liquid viscosity:2~3000(mPa.s)
Protection class:IP65 (special order IP68)
Repeatability error:±0.2, ±0.5 of the measured value
Accuracy class:0.2, 0.5% class
Measured medium temperature:Normal temperature type: -20~60℃
High temperature type: +60℃~200℃
Ultra-high temperature type: 220℃
Rated working pressure: (high pressure can be customized)Cast iron: ≤1.6MPa
Stainless steel: ≤1.6MPa or 2.5MPa
Cast steel: ≤2.5MPa (4MPa, 6.5MPa optional)
Power supply:DC24V or 3.6V battery
Total power consumption:less than 20W
Ambient temperature:-40~+60℃
Relative temperature:5%~95%
output signal:Pulse signal or 4-20mA current signal
Current output:Load Resistance0~10mA:0~1.5kΩ
4~20mA:0~750 Kω
Digital frequency output:The upper limit of the output frequency can be set within 1~5000HZ of the open-collector bidirectional output of the transistor with photoelectric isolation. When the external power supply ≤35V is turned on, the maximum collector current is 250mA

Selection table

FG10-Cast Iron Universal Gear Flow Meter
FG20-Cast steel universal gear flowmeter
FG30L-Stainless Steel Gear Flow Meter .1.4301(304)
FG30K-Stainless Steel Gear Flow Meter .1.4435 (316L)

Applicable pipe diameter

DN10-DN200(mm) Please refer to the selection code table

Connection method

Flange type connection

External thread connection

Measured liquid viscosity

0.3 ~ 0.6mpa.s

0.6~2mpa.s

2~200mpa.s

200~1000mpa.s

1000~2000mpa.s

Measured medium temperature

Normal temperature type -20~60℃

High temperature type 60~220℃

Accuracy class

Level 0.5

Level 0.25

Level 0.2

Withstand voltage

Please refer to parameter options such as 1.0=1MPa

signal type

Pulse signal

4~20mA current signal

no signal

Alternative: In-place display system

Mechanical character wheel cumulative display unit (optional)

Mechanical character wheel accumulative display unit + reset function

LCD digital display unit (optional)

Insulation jacket function (must be selected for easy-curing media)

Reduce diameter and expand diameter function
The complete data of this selection table, please contact the sales staff or email to sales@kewill-auto.cn for complete samples.
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