Product Introduction: WF-YL11-2 Stainless Steel Threaded Impeller Flow Indicator

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

Overview

The WF-YL11-2 threaded impeller flow indicator is a compact visual monitoring device developed for small and medium-diameter industrial pipelines. Featuring an integrally forged stainless steel body, internal thread connection, and high-sensitivity impeller sight window, it provides real-time, intuitive observation of medium flow conditions. 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. Integrally Forged Stainless Steel Body
Made of high-quality 304/316 stainless steel, the body is integrally forged 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. Standard Internal Thread Connection
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 tight spaces and systems requiring routine maintenance, significantly reducing installation and upkeep costs.

3. High-Transparency Sight Glass with High-Sensitivity Impeller Indicator
Equipped with a high-strength borosilicate sight glass, the indicator features a built-in star-shaped impeller. The impeller rotates as the medium flows, providing clear visual confirmation of flow even at low velocities, eliminating blind spots in pipeline monitoring.

4. Precision Leak-Proof Sealing
A food-grade, high-temperature resistant sealing gasket between the sight glass and body ensures a zero-leakage seal, preventing leaks in various industrial media.

Core Advantages

• Superior Corrosion Resistance: Stainless steel construction resists corrosion from water, oil, and weak acids/alkalis, offering a longer service life than carbon steel alternatives.

• Versatile Compatibility: Fits standard pipe threads in various sizes, with no additional accessories required for integration into existing pipeline systems.

• Sensitive Low-Flow Indication: The impeller design responds reliably to low flow rates, preventing false "no-flow" misjudgments and improving monitoring reliability.

• Maintenance-Free Operation: The one-piece forged body 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 to prevent pump dry-running.

• Water treatment: Visual inspection of circulating water and pure water systems.

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

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

Service & Support

All WF-YL11-2 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.