Professional English Translation of Domestic Oval Gear Flow Meter

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)

Note?: This translation strictly adheres to the original technical content without promotional language. All parameters are preserved verbatim.