SI-3602 High temperature Oval Gear Flow Meter
The SI-3602 High Temperature Oval Gear Flow Meter is specifically designed for measuring the flow rate of high-temperature liquids, such as liquid coal tar, heated asphalt, and high-temperature heat transfer oil. The mechanical display can measure media at temperatures up to 200°C, while the intelligent digital display can measure media at temperatures up to 150°C. Temperature ranges from 280°C to 350°C can be customized.

| Diameter | DN10~DN200 |
| Accuracy | Class 0.5 or 0.2 |
| Temp. range | +100℃-280℃ |
| Pressure | 1.0MPa、1.6MPa、2.5MPa、4.0MPa、6.4MPa |
| Medium | High viscosity liquid and All kinds of oil |
| Explosion-proof | iaⅡCT5,dⅡBT4 |
Features
Specifications
| Model | SI-3602-TA | SI-3602-TE | SI-3602-TB | |||
| Category | cast iron high temp. | cast steel high temp. | stainless steel high temp. | |||
| Nominal pressure MPa | 1.0 1.6 | 2.5 4.0 6.4 | 1.0 1.6 | |||
| Medium viscosity | 2~200 mpa.s | |||||
| Medium temp. | +100℃-280℃ | |||||
| Flow rate range (m3/h) | SI-3602-TA | SI-3602-TE | SI-3602-TB | |||
| Nominal diameter | Class 0.5 | Class 0.2 | Class 0.5 | Class 0.2 | Class 0.5 | Class 0.2 |
| 10 | 0.08~0.4 | 0.1~0.4 | 0.08~0.4 | 0.1~0.4 | 0.1~0.4 | 0.1~0.4 |
| 15 | 0.27~1.35 | 0.35~1.35 | 0.27~1.35 | 0.35~1.35 | 0.35~1.35 | 0.35~1.35 |
| 20 | 0.54~2.7 | 0.68~2.7 | 0.54~2.7 | 0.68~2.7 | 0.68~2.7 | 0.68~2.7 |
| 25 | 1.08~5.4 | 1.35~5.4 | 1.08~5.4 | 1.35~5.4 | 1.35~5.4 | 1.35~5.4 |
| 40 | 2.7~13.5 | 3.5~13.5 | 2.7~13.5 | 3.5~13.5 | 3.5~13.5 | 3.5~13.5 |
| 50 | 4.4~21.6 | 5.4~21.6 | 4.4~21.6 | 5.4~21.6 | 5.4~21.6 | 5.4~21.6 |
| LA50 | 4.4~21.6 | 5.4~21.6 | 4.4~21.6 | 5.4~21.6 | / | / |
| 65 | 9.2~46 | 11.5~46 | 9.2~46 | 11.5~46 | 11.5~46 | 11.5~46 |
| LA65 | 6.8~34 | 8.8~34 | 6.8~34 | 8.8~34 | / | / |
| 80 | 10.8~54 | 13.5~54 | 10.8~54 | 13.5~54 | 13.5~54 | 13.5~54 |
| LA80 | 8.8~44 | 11~44 | 8.8~44 | 11~44 | / | / |
| 100 | 18~90 | 22~90 | 18~90 | 22~90 | 22~90 | 22~90 |
| 150 | 34~170 | 42~170 | 34~170 | 42~170 | 42~170 | 42~170 |
| 200 | 60~300 | 75~300 | 60~300 | 75~300 | 75~300 | 75~300 |
Order Guide
In addition to regular products, we support customization
| SI-3602 | Description | |||||||||
| Housing material | TA | Cast iron | ||||||||
| TE | Cast steel | |||||||||
| TB | Stainless steel | |||||||||
| Diameter | DNX | DN10~DN200(mm) | ||||||||
| Working Pressure | 1 | 1.0MPa | ||||||||
| 2 | 1.6MPa | |||||||||
| 3 | 2.5MPa | |||||||||
| 4 | 4.0MPa | |||||||||
| 6 | 6.4MPa | |||||||||
| Accuracy | A | 0.2 | ||||||||
| B | 0.5 | |||||||||
| Connection | 1 | Flange | ||||||||
| 2 | Thread | |||||||||
| Output | L0 | Pulse | ||||||||
| L1 | 4-20mA | |||||||||
| Communication | R | RS485 | ||||||||
| N | / | |||||||||
| Display | 1 | Pointer | ||||||||
| 2 | LCD | |||||||||
| Explosion-proof | H | iaⅡCT5 | ||||||||
| G | dⅡBT4 | |||||||||
Unique Design Structure
To facilitate the normal transport and flow detection of media that easily solidify at room temperature, condense or crystallize at a certain temperature, within pipelines, it is often necessary to heat the media in the system pipeline to melt and maintain its temperature. However, since direct steam flow is not permitted at the installation location of the oval gear flow meter (to prevent damage to the flow meter), our company has designed an insulation jacket to be added to the outside of the flow meter housing.
Hot water, hot oil, or steam below 200℃ can be introduced into the insulation jacket to melt the solidified media inside the flow meter (or filter) and maintain a certain temperature, thereby ensuring the normal operation of the flow meter.
The filter installed before the oval gear flow meter can also be in the form of an insulation jacket; special orders are available upon request. The nominal pressure of the insulation jacket is 0.5MPa.
Applications
Industrial gear flow meters are designed for a variety of chemical applications. Suitable for viscous, non abrasive, clean liquids like: Water solutions, PetroleumOilChemicals, GreaseFuelsInk, Pastes.
- Chemical Production: caustic soda, potassium hydroxide, acetic acid, demineralized water
- Food Industry: sugar solutions, syrups, oils, sauces, beverages, honey, molasses, milk products, juices, chocolate, alcohol, ethanol and coatings
- Pharmaceutical Industry: alcohols, syrups, glycerines and coatings
- Cosmetics Industry: shampoos, gels, perfumes and creams
- Oil and Gas Industry: fuels, lubricants and petro-derivatives
- Water and Wastewater Industry: chemicals, fluoride and acids
- Pulp and Paper Industries: wax finishes, perfumes, dyes and acids in the pulp and paper industries
- Printing: solvents and inks
- Automotive: transmission fluid, glycol, low viscosity climatization liquids and hydraulic oil
- Textiles: dyes, bleach and chemicals
- Petroleum Industry: oils, gasoline, biodiesel, additives and kerosene
- Paint: solvent and latex based paints
- Shipbuilding: lubricating oil, fuels ,marine oil
- Mining Industry: oils, fuels, lubricants
- Metal Industry: heating oil, fuels, oils
- Glue Industry: acrylic water based glue, solvents, cleaning agents
High-Temperature Liquid Flow Measurement Cases
Sino-Inst supports custom-designed high-temperature oval gear flow meters for users, based on different temperatures, media, pressures, and signal output requirements. For example, here are some parameters we previously customized for a client:
- Oval Gear Flow Meter
DN80
Measuring Medium: Asphalt
Flow Range: Approximately 30 L/min to 250 L/min
Pressure: 1.6 MPa
Temperature: 140°C ~ 200°C
Unit: L/min
Requires display of cumulative flow (in liters) and reset capability
Viscosity: 200-1000 MPa.s
With heat tracing
- Oval Gear Flow Meter
Measuring Heat Transfer Oil
DN100
Material: Cast Iron
Connection: DN100 Flange
Nominal Pressure: 1.6 MPa;
Temperature Range: -20-200°C;
Accuracy: 0.5%;
Viscosity Range: 2-200 MPa.s;
Flow Range: 16-100 m³/h
Output: 4-20 mA Mechanical Display
Output: 4-20 mA Power Supply: 24VDC
Techincal Support
How to Choose the Right Heating Oil Flow Meter for Your Business
An All-inclusive Guide on Crude Oil Measurement
Bitumen And Asphalt Level Meters: Let’s Learn More About Them
PD Meter Guide: What is Positive Displacement Flow Meter?
High Viscosity Flow Meters
Oval gear flow meters, as a long-established liquid flow measurement device, offer a wide range of customization options. They are primarily used for flow measurement of high-temperature, high-viscosity, clean liquids.
Sino-Inst supports customization of high-temperature oval gear flow meters, including options such as cast iron and stainless steel. Mechanical or intelligent displays can also be configured to output signals. Please feel free to contact our sales engineers for custom high-temperature oval gear flow meter requests!
Zhang Wei, possesses 20 years of experience as an automation instrumentation engineer, specializing in the research, design, installation, commissioning, and maintenance of automation instruments.
Face to various instrument communication protocols (such as Modbus, Profibus, etc.), with solid hardware circuit design and software programming skills (proficient in C language and PLC programming). Has extensive project experience; projects he has led and participated in have all achieved outstanding results, improving product accuracy, reducing costs, and increasing production efficiency.
Possesses excellent communication and coordination skills and a strong team spirit, enabling him to quickly respond to customer needs and provide high-quality automation instrumentation solutions.




