JCLC Oval Gear Flowmeter

JCLC Oval Gear Flowmeter are used for the continuous and intermittent measurement and control of the pipe liquid flow, which are typical of positive displacement meter, feature large flow range, low pressure loss, large viscosity range, easy installation, high accuracy and can measure high temperature, high viscosity liquids with easy calibration.

JCLC Oval Gear Flowmeter

Oval gear meters are instruments used for the continuous and intermittent measurement and control of the pipe liquid flow, which are typical of positive displacement meter, feature large flow range, low pressure loss, large viscosity range, easy installation, high accuracy and can measure high temperature, high viscosity liquids with easy calibration.

JC-LC oval gear meters are fitted with on-site pointer indication and roller integration device which can indicate the liquid flow and intermittent flow passing through the pipeline. For the different liquids (acid, alkali, salt, organic solution etc.), the meters can be made of different materials (cast iron, cast steel, stainless steel etc.). The meters are widely used for the flow measurement in the field of petroleum, chemical, chemical fiber, traffic, food industries and commerce, medical and sanitary departments.

Operation Principle

Oval gear meter is generally comprised of a flow transducer and a counter mechanism. The main part of the transducer is a measuring chamber which consists of a pair of oval wheels and a sealing coupling. The counter mechanism contains speed reduction gears, adjusting device, counter, and pulse transmitter etc.

In the measuring chamber, a pair of oval wheels and cover plate make a crescent shape cavity which is used as a measuring unit. The oval wheels are rotated by the pressure difference in the inlet and outlet of the meter and drive the inlet liquid through the cavity to the outlet, each revolution of the oval wheels displaces fluid four time the volume of the cavity, the total revolutions of the oval wheels and the revolution rate will be transferred to the mechanical counter, and the total liquid volume and instantaneous flow will be known by the pointer display and the roller integration. The attached signal generator converts the rotary axial angular shift to the pulse signal and then transmits it to the electrical indicator for remote integrated flow and instantaneous flow indication and control.

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Technical Parameter for JCLC Oval Gear Flowmeter

1. Materials of main parts and the nominal operating pressure

Shell and cover cover plate oval wheel Rotary shaft Sheath of shaft Nominal pressureMPa
JCLC-A Cast steel Cast iron Stainless steel Bronze(with oil) or rolling bearing 1.6
JCLC-E Cast steel Cast iron、Stainless steel Under DN50 6.3

DN80-100  4.0

DN150-200  2.5

JCLC-Q Cast iron Cast iron Alloy aluminum, engineering material graphite 1.6
JCLC-B、C Stainless steel Stainless steel Stainless steel graphite 1.6、2.5


Cast iron,

Stainless steel


aluminum, engineering material

Bronze(with oil)、graphite、rolling bearing 1.6
Notes:1. 0Cr18Ni12Mo2Ti for type JCLC-C; 0Cr18Ni9Ti for type JCLC-B

2. Flange is convex under 2.5MPa ,and roughness at 6.3 MPa;and both of the above at 4.0 MPa。

2. Accuracy        class 0.5, class 0.2 (normal operating temperature -10℃~+60℃)

3. Measured media temp. (environment temperature -41℃~+50℃)

JCLC-A、B、C: -20℃~+60℃; 60℃~200℃(with high temp. radiator installed)

JCLC-Q、L: -20℃~+60℃;

4. Explosion-proof mark: ExiaⅡCT5, dⅡBT4

5. Flow range:                                                                  unit: m3/h

Type DN Viscosity (mPa. s)     




0.8~2 2~200 200~1000








JCLC-10 10 0.2-0.5 0.08-0.5


0.08-0.5 0.05-0.5 0.06-0.3 0.03-0.3 0.03-0.2
JCLC-15 15 0.75-1.


0.3-1.5 0.3-1.5 0.15-1.5 0.2-1.0 0.1-1.05 0.07-0.75
JCLC-20 20 1.5-3 1-3 0.4-3 0.5-3 0.3-3 0.4-2.1 0.2-2.1 0.15-1.5
JCLC-25 25 4-6 3-6 2-6 0.8-6 1-6 0.6-6 0.8-4.2 0.4-4.2 0.3-3
JCLC-40 40 9-15 7.5-15 5-15 2-15 2.5-15 1.5-15 2.1-10.5 1.0-10.5 0.7-7.5
JCLC-50 50 10-24 8-24 8-24 3-24 4.8-24 2.4-24 2.4-16.8 1.6-16.8 1.2-12
JCLC-B40、50 40、50 8-20 6-20 6-20 4-20 4-20 2-20 2.8-14 1.4-14 1.0-10
JCLC-B65 65 27-40 20-40 15-40 5-40 8-40 4-40 5.6-28 2.8-28 2-20
JCLC-80 80 40-60 30-60 20-60 8-60 12-60 6-60 8.4-42 4.2-42 3-30
JCLC-100 100 67-100 50-100 34-100 13.-100 20-100 10-100 14-70 6-70 5-50
JCLC-150 150 127-190 95-190 64-190 24-190 38-190 19-190 26.6-133 13.3-133 9.5-95
JCLC-200 200 227-340 170-340 114-340 43-340 56-340 34-340 47.6-238 23.8-238 17-170


0.5 0.5 0.2 0.5 0.2 0.5 0.2 0.5 0.5
Note 1.“gal/h” could be used for special orders.

2.Flow range of type JCLC-A80.2 is 1760gal/h~13200gal/h

Note: If the temperature of the metered liquid is higher than 80℃. the maximum flow fate will be 90% of the primary flow and the minimum will be 120%.


Model Selection for JCLC Oval Gear Flowmeter

Type Special symbol Special function Material DN Special require–ment Allowable pressure Counter Pulse transmi-tter Accura-cy Illumination
shell rotor
1 2 3 4 5 6 7 8 9 10 11 12
JCLC- Oval flowmeter
U Matchedthermal insulation sleeve
G tube thread
H Flowmeter of welded steel
D Flowmeter of batch meter
N Flowmeter of large viscosity
SP flowmeter for foodstuff
T12 High temp. with radiator (1for long,2 for short)
Q Meter for gas
A Cast iron meter
B/C  ////B/C  B/C  B/C(C) Stainless steel meter
E Cast steel meter
L Alloy aluminum meter
A Material is cast iron
B/C Material is stainless steel
L Material is alloy aluminum
Z Material is engineering material
10 Nominal diameter 10 mm
200 Nominal diameter 200 mm
S(K) Flange  shrunk(widened)
Improved type

1 When the oval wheel’s material is same with the shell’s, it can be not indicated;

.2/ 1.6 MPa
.3/ 2.5 MPa
.4/ 1.0 4.0MPa


.6/ 6.3 MPa
2.’ B’-OCr18Ni9Ti;C-OCr18Ni12Mo2Ti;

3.B before generator means separation generator;

4.if without radiator the meter could be only marked T;

A、A1 Used for counter under DN40
A5、J1 Used for counter above DN50
ELZ Counter with electric indicator
A6 Z return-to-zero counter
5. At past JCLC11 was used as on-site indicator and JCLC12 as meter with transmitter. New clients are proposed to use this new marker and old customers may use the old ones. FX used for type LC13
GF-Ⅰ 12Vthree-cable pho-electri transmitter
GF-Ⅱ 24V three-cable pho-electri transmitter
QF-Ⅰ 12V two-cable inductance transmitter
QF-Ⅱ 12V three-cable inductance transmitter
QF-Ⅲ 24V three-cable inductance transmitter
MF-123 4—20mAanalog signal output
J High accuracy meter

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