Venturi Tubes

High-Accuracy,
Low-Loss DP Flow Element
 

Overview

The McMenon Venturi Tube delivers precise flow measurement with minimal permanent pressure loss. Their streamlined profile eliminates turbulence and protects against wear, making them ideal for corrosive or high-pressure services.

Key Features

• Low permanent loss: ≥ 75 %–80 % pressure recovery
• No moving parts: Maintenance-free operation
• Standards compliance: ANSI/ASME, DIN, JIS flange configurations
• Wide material choice: Carbon steel, stainless steel, exotic alloys

Typical Specifications

Parameter	Value
Line sizes	2″–120″ (DN 50–DN 3000)
Accuracy	±0.5 %–1 % of reading
Pressure rating	PN 6–PN 420 (ANSI 150–2500)
Temperature range	–196 °C to +600 °C
Materials	Carbon steel, 316 SS, Inconel, Hastelloy

Applications

• Power‑plant steam flow
• LNG and cryogenic services
• Corrosive chemical processes
• High‑pressure oil & gas pipelines

Case Studies

Geothermal Steam Service – Hawaii, USA

As part of the Puna Repower project, McMenon engineered a 16″ carbon‑steel Venturi tube to measure high‑pressure geothermal steam. Its precision‑machined throat minimizes permanent pressure loss (> 80 % recovery) and provides ±0.5 % accuracy, critical for optimizing renewable‑energy output in remote field conditions.

Subsea Injection Lines – North Sea

The McMenon DeepSea Venturi, built in Inconel 625 and rated to 15,000 psi, was integrated into a subsea water‑injection tree for an FPSO in the North Sea. The unit’s robust, no‑moving‑parts construction ensures long‑term reliability under extreme pressure and corrosive seawater exposure.