Product Introduction: WF-YL11-05 Stainless Steel Tubular Impeller Flow Indicator

Manufacturer: Wenzhou Weifeng Technology Co., Ltd.
Website: www.alvifeng.com

Overview

The WF-YL11-05 tubular impeller flow indicator is a full-bore visual monitoring device developed for direct-connect industrial pipelines. Featuring a precision-machined 304/316 stainless steel body, transparent tubular sight window, internal thread connection, and built-in impeller, it allows clear observation of medium flow conditions directly along the pipe axis. Widely used in water supply, HVAC, chemical processing, food & pharmaceutical, and general industrial systems, it is a key component to prevent system failures such as dry running and flow interruptions.

Key Design & Structure

1. High-Quality Stainless Steel Body
The body is precision-machined from high-quality 304/316 stainless steel with a passivated surface treatment for superior corrosion and wear resistance. It is suitable for water, oil, and weakly corrosive media, with no risk of rust or contamination, meeting hygiene requirements for food and pharmaceutical applications.

2. Fully Transparent Tubular Sight Window with Double Seal
The central section features a high-strength borosilicate glass or clear PC tube as the sight window, paired with food-grade fluororubber O-rings for double sealing. With excellent pressure and temperature resistance, it allows 360° all-round observation of medium flow, impeller rotation, and impurities, eliminating blind spots in pipeline monitoring.

3. Built-In Impeller Indicator System
A red paddle impeller inside the tube rotates as the medium flows, providing clear visual confirmation of flow even at low velocities. The impeller speed also roughly indicates the flow rate, intuitively reflecting the pipeline's operating status.

4. Standard Internal Thread Connection
Both ends are designed with universal internal threads to fit DN15-DN50 pipe sizes, eliminating the need for flanges or welding. It is quick to install and disassemble, ideal for direct-connect pipeline scenarios, significantly reducing installation and maintenance costs.

Core Advantages

• Full-Bore No-Pressure-Loss Design: The straight-through structure maintains the pipe's full bore without additional pressure drop, ensuring no impact on medium delivery efficiency.

• 360° All-Round Observation: The transparent tubular sight window provides an unrestricted view, allowing simultaneous observation of flow status, media color, impurities, and impeller speed for comprehensive monitoring.

• Superior Corrosion Resistance: The combination of a stainless steel body and corrosion-resistant seals ensures long-term resistance to water, oil, and weak acids/alkalis, offering a long service life.

• Sensitive Low-Flow Indication: The paddle impeller responds reliably to low flow rates, preventing false "no-flow" misjudgments.

• Maintenance-Free Operation: The precision sealing structure and robust design require only periodic sight glass cleaning, making it ideal for continuous industrial use.

Typical Applications

• HVAC systems: Monitoring chilled and cooling water flow in main pipelines to prevent pump dry-running.

• Water treatment: Visual inspection of circulating water and pure water systems in direct-connect pipelines.

• Chemical and light industry: Monitoring weakly corrosive fluids and oil pipelines.

• Food and pharmaceutical industries: Hygienic flow monitoring for clean media pipelines.

• Small industrial systems: Flow status observation in hydraulic and pneumatic systems.

Service & Support

All WF-YL11-05 flow indicators undergo strict pressure, sealing, and corrosion resistance tests before leaving the factory. We offer customization for different materials (304/316), sizes, and thread specifications, with full technical support from selection and production to after-sales maintenance.