Professional English Translation of Domestic Oval Gear Flow Meter

Product Overview?

The ?domestic oval gear flow meter? (a positive displacement meter) is a precision instrument widely used in industrial flow measurement applications. It is particularly suitable for sectors including:

Chemical

Petroleum

Pharmaceutical

Power generation

Metallurgy

Food processing

Technical Specifications?

1. ?Material Variants?

Standard models?:

Cast iron (Type A)

Cast steel (Type E)

Stainless steel (Type B)

2. ?Display & Output Options?

Mechanical display?:

Pointer-type totalizer

Reset function

Electronic display?:

Instantaneous/total flow LCD

Pulse/4–20mA/RS485 output

Communication protocols (e.g., Modbus)

3. ?Performance Metrics?

Accuracy?:

Standard: ±1% R or ±0.5% R

High-precision: ±0.2% R

Repeatability?: 0.05%–0.2% (short-term)

Signal output?:

Pulse frequency (3–4 kHz)

No zero drift, high interference resistance

Turndown ratio?: 1:20 (large bore), 1:10 (small bore)

4. ?Design Features?

Compact structure, easy installation

High-pressure compatibility (no body perforation)

Customizable variants:

Low-temperature

Bidirectional flow

Submersible

Sand-slurry resistant

Insertion-type available for large pipelines

Operating Principle?

Fluid Measurement?:

A pair of elliptical gears rotates within a crescent-shaped chamber.

Each rotation displaces a fixed volume (non-hermetic due to rotation).

Flow Calculation?:

Total flow = Gear rotations × 4 × chamber volume.

Pressure differential between inlet/outlet drives gear movement.

Material Compatibility?

Fluid Type? ?Examples? ?Recommended Material?

Corrosives? Acids, alkalis Stainless steel (316L)

Oils/Fuels? Hydraulic oil, diesel Cast steel

Food-grade? Edible oils, syrups Stainless steel (304)