Product Introduction: WF-YL11-03 Stainless Steel Threaded Hemispherical Impeller Flow Indicator

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

Overview

The WF-YL11-03 hemispherical impeller flow indicator is a wide-view visual monitoring device developed for small and medium-diameter industrial pipelines. Featuring an integrally forged 304/316 stainless steel body, internal thread connection, hemispherical sight glass, and impeller indicator, it provides clear multi-angle 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 (e.g., the 3/4" specification shown), 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. Hemispherical Wide-View Sight Glass with High-Sensitivity Impeller Indicator
Equipped with a high-strength borosilicate hemispherical sight glass, the indicator provides a 180° wide viewing angle. The built-in multi-blade red impeller rotates as the medium flows, allowing 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.

• Wide-View Observation: The hemispherical sight glass provides a broader viewing angle, allowing clear observation of impeller rotation, media color, and impurities, improving monitoring accuracy.

• 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 multi-blade 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-YL11-03 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.