Product Overview‌

The ‌TC-TY series oval gear flow meter‌ is a positive displacement meter specifically engineered for high-viscosity fluids, including:

Heavy oils

Polyvinyl alcohol (PVA)

Resins

As a purely mechanical device, it is intrinsically safe for hazardous environments and offers:

Local display

Pulse signal output for remote transmission

Optional stainless steel construction for corrosive/sterile environments (e.g., chemical, food-grade applications)

Technical Specifications‌

1. ‌Core Parameters‌

Accuracy Class‌: ±0.3% or ±0.5%

Bore Sizes‌: DN10–DN150

Materials‌:

Housing‌: Aluminum / Stainless steel (high-pressure variants) / PPS / Bronze

Bearings‌: Ceramic / Bronze / Hastelloy / Carbide / PPS / Stainless steel

Shaft‌: 316 stainless steel

Seals‌: Viton® / FKM / PTFE / Stainless steel O-rings

2. ‌Performance Metrics‌

Turndown Ratio‌: 10:1 (up to 50:1 optimized)

Repeatability‌: ±0.03%

Viscosity Range‌: 1–1,000,000 cP

Pressure Rating‌: Up to 551 bar

Temperature Range‌: -10°C to +60°C

3. ‌Installation Requirements‌

Pipe Straight Runs‌: 5D upstream + 3D downstream (mandatory 80μm upstream filter)

Flow Direction‌: Unidirectional (reverse flow prohibited)

Priming Protocol‌: Gradual startup (<50% overrange) to prevent gear damage

Operating Principle‌

Fluid Displacement‌:

Fluid enters the metering chamber, driving paired oval gears via differential pressure. Each rotation displaces a fixed volume.

Signal Generation‌:

TTL (NPN transistor) or contact-closure pulse output

Accuracy improves with viscosity (±0.1% achievable at high viscosity)

Critical Notes‌

Prohibited Media‌:

Solids-laden fluids (risk of gear jamming)

Aerated liquids (measurement errors)

Water (prohibited for testing)

Maintenance‌:

Avoid disassembling rear cover (calibration integrity)

Use bypass valves for system flushing

Error Calculation & Calibration‌

Basic Error Formula (Volumetric Method)‌:

text

Copy Code

E = (Vm - V) / V × 100%  

E‌: Meter error (cumulative)

Vm‌: Meter reading

V‌: Calibrated reference value

Adjustment Method‌:

Replace counter gear pairs to modify mechanical transmission ratio (does not alter flow characteristics).