The LC series elliptical gear flowmeter is a volumetric flow meter consisting of a measuring chamber equipped with a pair of elliptical gear rotors, a sealed coupling (small caliber flowmeters use high-sensitivity magnetic couplings), and a counting mechanism. This flowmeter is used to measure the flow rate of a full pipe fluid in a sealed pipeline under pressure. It has the advantages of high precision, good reliability, long service life, large range, small pressure loss, strong viscosity adaptability, and easy installation and maintenance.

LC series elliptical gear flowmeter
LC sery elliptic gear flowmeter

The LC series elliptical gear flowmeter is the main type of positive displacement flowmeter used to measure the flow rate of a medium in a closed pipe with full pipe flow under pressure. It has the advantages of high accuracy, good reliability, long service life, large range, small pressure loss, and strong viscosity adaptability. The measurement is basically not affected by temperature and pressure changes, and it is easy to install. Mainly used for measuring liquids. This flowmeter is a direct reading cumulative fluid flowmeter, consisting of a measuring chamber equipped with a pair of elliptical gear rotors, a sealed coupling (small caliber flowmeters use highly sensitive magnetic couplings), and a counting mechanism.

LC series elliptical gear flowmeter main technical parameters:

Basic error limit (%)		±0.5
Nominal pressure (Mpa)		1.6
Working temperature (℃)		-30～+160
Liquid viscosity (mpa. s)		0.6～200
model	Nominal Diameter （mm）	Flow range (m3/h)
		Viscosity of petroleum products (mpa. s)			Chemical liquids
		0.6～2	2~8	8~200	0.6～200
LC-10	10	0.15～0.4	0.08～0.4	0.04～0.4	0.1～0.4
LC-15	15	0.38～1.5	0.25～1.5	0.15～1.5	0.3～1.5
LC-20	20	0.75～3	0.4～3	0.3～3	0.6～3
LC-25	25	1.5～6	0.8～6	0.6～6	1.2～6
LC-40	40	3~15	2~15	1.5～12	2.4～12
LC-50	50	4.8～24	3.2～2.4	2.4～24	3.8～19
LC-80	80	12~60	8~60	6~60	10~50
LC-100	100	12~100	13~100	10~100	16~80
LC-150	150	30~150	20~150	15~150	30~150

Unit: mm

Model	Nominal diameter Dg	Total length L	Total width H	Total height B	Center height A	Flange D	Flange hole D1	Bolt hole n - φ
LC-15	15	200	138	220	160	105	75	4-φ14
LC-20	20	250	164	232	180	125	90	4-φ18
LC-25	25	300	202	252	185	135	100	4-φ18
LC-40	40	300	202	293	208	165	125	4-φ23
LC-50	50	384	262	394	312	175	135	4-φ23
LC-80	80	450	337	452	332	210	170	8-φ23
LC-100	100	555	442	478	370	250	200	8-φ25

Note: Cast steel flowmeter is used for measuring high pressure (6.4MPa, low corrosive media)

Stainless steel elliptical gear flowmeter

The main material is made of stainless steel, which has strong corrosion resistance and is used in industries such as chemical and food.

Elliptical gear flowmeter with zero return device

This flowmeter adopts a zeroable counter based on the LC type. This counter is equipped with two sets of character wheels, zero return and accumulation, with dual functions of batch counting and total accumulation. Its feature is that when the user is implementing intermittent measurement and wants to obtain calculation results separately, the instrument pointer and zero return character wheel set can be pre-set. Displaying zero will give each measurement value, which can be repeatedly used. When the total accumulation is continuously used, rotating the character wheel zero handle clockwise can return the zero counter digit set to zero position: pressing the pointer zero return handle and rotating clockwise can return the pointer to zero position. When using a reset counter, it does not affect the cumulative counter measurement.

The LC-HL series zeroing sleeve circular gear flowmeter adopts a zeroable counter based on the LC type. The counter is equipped with two sets of wheels for zeroing and accumulating, and has dual functions of single batch counting and total accumulation. When using single batch counting, rotating the zero handle of the character cycle clockwise can make the zero character cycle return to zero position; Pull down the pointer return handle and rotate it clockwise to return the pointer to zero position. When using a reset counter, it does not affect the cumulative counter measurement.

LC series elliptical gear flowmeter external dimensions table (cast iron, stainless steel)
Company: mm

Model	Nominal diameter Dg	Total length L	Total width H	Total height B	Center height A	Flange D	Flange hole D1	Bolt hole n - φ
LC-15	15	180	124	205	158	95	65	4-φ14
LC-20	20	180	124	225	168	105	75	4-φ14
LC-25	25	245	184	240	171	115	85	4-φ14
LC-40	40	250	184	270	187	145	110	4-φ18
LC-50	50	340	255	305	210	160	125	4-φ18
LC-80	80	420	310	390	260	195	160	8-φ18
LC-100	100	440	330	440	280	215	180	8-φ18

The LCB type elliptical gear flowmeter is equipped with a pulse transmitter in the counting mechanism of the LC type elliptical gear flowmeter, which is matched with our WJK microcomputer flow controller. It is mainly used for measurement in the storage and transportation processes of petroleum, chemical, and oil. It can achieve quantitative automatic control of liquid measurement, and can print batch and cumulative measurements, with long-term data storage. It can also be matched with other secondary instruments that receive pulse signals.

Bring back the zero band 4-20mA signal output

LCB series elliptical gear flowmeter

LCB sery elliptic gear flowmeter

The LCB type elliptical gear flowmeter is equipped with a pulse transmitter in the counting mechanism of the LC type elliptical gear flowmeter, which outputs pulse signals or 4-20mA current signals. It is matched with our WJK microcomputer flow control instrument and is mainly used for receiving and measuring in the storage and transportation of petroleum, chemical, and grease industries. It can achieve quantitative automatic control of liquid measurement and print the departure date, oil density, pulse number of the flowmeter, quality of each oil delivery, and cumulative quality of each oil delivery. And it can achieve centralized control, improve work efficiency, and facilitate modern management.

Main technical parameters:

1. System measurement accuracy ＜ ± 0.3%

2. Working environment temperature -10~+55 ℃ humidity 30~80%

3. Measurement range 1-99999kg

4. Working voltage AC220V ± 10% 50HZ ± 5%

5. Static power consumption (without printing or oil dispensing) 0.8W

Dynamic (printing instantaneous large value) 8W

Instrument model Model	Caliber Dg	Total length L	Width H	Height B	Center height A	flange D	Flange hole D 1	Bolt hole n - Φ
LC-15 LCB-15	15	180	124	205	158	95	65	4-Ф14
LC-20 LCB-20	20	180	124	225	168	105	75	4-Ф14
LC-25 LCB-25	25	245	184	240	171	115	85	4-Ф14
LC-40 LCB-40	40	250	184	270	187	145	110	4-Ф18
LC-50 LCB-50	50	340	140	305	210	160	125	4-Ф18
LC-65 LCB-65	65	340	253	310	213	180	145	4-Ф18
LC-80 LCB-80	80	420	310	390	260	195	160	8-Ф18
LC-100 LCB-100	100	440	330	440	260	215	180	8-Ф18

LCB series elliptical gear flowmeter:
1、 Introduction to Control System Functions:
A large screen microcomputer is used to control the automatic oil delivery of multiple cargo positions. The screen display is shown in the figure. As long as a human operator clicks the oil delivery start button of a certain cargo position with the mouse, a keyboard window will pop up on the screen. Enter the quantity of oil to be delivered, confirm, and the oil pump and solenoid valve of that cargo position will open, starting to deliver oil to the tanker truck. On the screen, it can be seen that the liquid level in the oil tanker truck is rising, while the liquid level in the large oil tank is decreasing, and the display number on the screen fluctuates with the amount of oil being delivered. The large screen control display on the oil delivery site platform also synchronously displays the remaining amount of oil being delivered. When the oil delivery quantity is completed, the pump and valve will be automatically stopped, and there will be a sound prompt on the on-site storage platform.
Using the same method, operators can point to any storage location on the microcomputer to dispense oil simultaneously. (According to user needs, each storage location can also be designed to be individually operated by on-site personnel for oil dispensing, which ensures that even if the system malfunctions, it will not affect the oil dispensing work.).
2、 Introduction to Quantity Management System:
The microcomputer automatically records the quantity of oil delivered at each location and time, as well as the quantity of oil entering and exiting the storage tank, and the cumulative amount of oil transported by each user (tank truck). You can print daily (monthly) sales reports, inventory and purchase reports, comprehensive and integrated statistical reports, etc. at any time using a printer.

LC series high temperature and high viscosity flowmeter
LC series square meter head flowmeter
When measuring high viscosity (such as asphalt) media, the high viscosity and high temperature elliptical gear flowmeter is prone to breakage or bending of the teeth or shaft due to the high pressure phenomenon caused by compression caused by fluid injection into the elliptical gear teeth groove. This is not conducive to the service life of the instrument. To reduce the injection pressure, several grooves (called undersoles) are dug on the elliptical gear to overcome the above phenomenon. Suitable for medium viscosity ranging from 200 to 1000m pa. s. A high-temperature flowmeter is located between the measuring chamber and the counting mechanism, separated by a heat pipe to ensure the normal operation of the instrument. It is suitable for temperatures ranging from 100 to 200 ℃.

Installment and use
1. The installation direction of the instrument should be consistent with the direction of the arrow on the instrument housing and the direction of liquid flow. The installation position should be easy to read (see figure).

2. Instruments should be installed at room temperature as much as possible, and should not be installed in environments with harmful gases or strong thermal radiation to prevent damage to the counter part of the instrument;
3. The elliptical gear shaft in the instrument should be installed in a horizontal position as much as possible, that is, the dial should be installed in a vertical position (the division O "should be on top), in order to reduce the friction between the elliptical gear and the housing and reduce the wear of the parts. Due to different installation positions, the counter (head) can be rotated 90 ° or 180 ° for ease of reading (see Figure 2).
4. Before installing the instrument, the pipeline must be cleaned throughout the entire piping system. If there is no strict filtering device, a filter should be installed in front of the instrument to prevent impurities from entering the instrument.
5. The instrument should be installed at the outlet end of the pump. The flow regulating valve should be installed downstream of the instrument. When using, first open the upstream shut-off valve, and then slowly open the downstream flow control valve or shut-off valve. Sudden opening or closing is strictly prohibited.
6. When using the instrument, the instrument should be filled with liquid and there should be no gas mixed in the measured liquid. Otherwise, the mixed volume of gas and liquid will cause inaccurate measurement. If gas is mixed in the liquid, a gas separator must be installed in front of the instrument.
7. The flow rate in the pipeline should not increase or decrease sharply, and phenomena such as pipeline vibration, hydraulic shock, and rapid pressure fluctuations should be avoided, otherwise it will affect the normal operation of the instrument.
8. When the flow rate exceeds the specified large flow rate, the wear of the elliptical gear increases with the increase of speed, and the pressure loss increases sharply. It should be avoided from use. Lower than small flow rate. Although it can still measure, the error increases. The starting flow rate of the flowmeter is about 2% of the large flow rate, and the normal working flow rate is better at 70% to 80% of the large flow rate
9. When used to measure high viscosity liquids, the liquid is generally heated to reduce viscosity and then circulated in the pipeline. After the instrument is stopped, the liquid filled inside the instrument cools and becomes viscous. If it needs to be used again, it must be heated by steam outside the instrument body to reduce the viscosity of the liquid inside the instrument before it can be used. Otherwise, the mucus will bite onto the transmission parts, causing damage to the instrument.
10. The temperature of the tested liquid should not exceed the specified value, as exceeding it may even cause the instrument to become stuck. Changes in liquid temperature can also cause additional errors in viscosity. In addition, the increase in temperature also causes an increase in the volume of the crescent shaped space, which slows down the instrument. When the measuring chamber is made of cast iron and the elliptical gear is made of cast aluminum, the additional error is+0.14%/100 ℃.
11. Each instrument is calibrated with No. 7 mechanical oil at room temperature before leaving the factory. The viscosity of the oil at room temperature is about 10mpa · s. If the viscosity of the liquid used by the user is significantly different from this, the double-layer gear can be replaced.
12. It is strictly prohibited to use sweeping steam and water to pass through the instrument

Attributes
[Flow meter type]	Positive displacement flowmeter