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Venturi throat

Insertion type Venturi tube is a classic Venturi tube with a smaller diameter inserted into the center of a circular pipeline. The difference between the static pressure of the front straight pipe and the throat of the insertion tube is measured to determine the flow rate, which can be used for gas flow rates with larger diameters (such as blast furnace gas, flue gas, etc.).

Key words:

Venturi throat

Classification:

Throttling device

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DESCRIPTION

1. Core Product Features

Energy-Saving & Low Consumption: The streamlined structure significantly reduces pressure loss (less than 30% of that of orifice plates), lowering energy consumption of pipeline pumps/compressors and meeting the needs of long-term energy-efficient operation.
Large-Diameter Adaptability: Specifically designed for pipelines with DN200-DN4000+ (customizable for extra-large-diameter pipelines), it solves the problems of difficult installation and high cost of full-bore Venturi tubes.
High Precision & Stability: Measurement accuracy ranges from ±0.5% to ±1.5%, with repeatability ≤±0.1%. The built-in flow-stabilizing structure resists turbulence interference, ensuring long-term reliable data.
Easy Installation & Low Maintenance: Adopts insertion-type installation (flange/threaded connection), no need for pipe cutting or long-term production shutdown (partial models support pressure installation). The throat features anti-corrosion polishing, with a maintenance cycle of 1-3 years, reducing costs.
Durable & Standard-Compliant: Core components are made of materials like 316L stainless steel and Hastelloy, resistant to high/low temperatures (-40℃-550℃) and corrosion. Complies with international standards such as ISO 5167-4 and ASME MFC-3M.

2. Key Technical Parameters

Parameter Category	Core Specifications
Nominal Diameter (DN)	Applicable for DN200-DN4000+; insertion length customizable based on pipeline diameter
Operating Pressure	Standard: ≤16MPa; High-pressure model: ≤42MPa
Operating Temperature	Standard: -40℃-350℃; High-temperature model: -40℃-550℃
Measured Media	Single-phase liquids/gases/steam (e.g., clean water, natural gas, superheated steam); adaptable to slightly contaminated media
Flow Velocity Range	Liquid: 0.2-10m/s; Gas/Steam: 0.5-30m/s; Turndown ratio: 10:1 (15:1 for intelligent models)
Pressure Tapping Method	Built-in dual-chamber (total pressure at contraction section + static pressure at diffusion section); interface: M20×1.5 or DN15/20 flange
Connection Method	Flange (GB/T 9119/ANSI B16.5) or Thread (G1½"/NPT1½")