Model No.: WF-YL41-10
Brand: TechWF
Manufacturer: Wenzhou Weifeng Technology Co., Ltd.
Official Website: www.alvifeng.com
Business Contact: WhatsApp +8618815068623
Core Application Sectors: Heavy Industry | Chemical Process Engineering | Precision Agriculture | Offshore & Marine Engineering
1. Product Overview
WF-YL41-10 flange connection cylindrical flow sight indicator is a heavy-duty industrial inline visual flow monitor independently developed by TechWF, designed for large-bore main pipelines requiring standard flange butt joint installation, suitable for high-temperature, high-salinity, slightly corrosive long-cycle fluid systems across industrial central cooling, chemical production trunk lines, large-scale farm irrigation and offshore marine circulation pipelines.
This sight glass adopts integrated CNC polished stainless steel cylindrical body with standard GB/ANSI/DIN flanged inlet & outlet, top-mounted round thick borosilicate observation window and high-visibility blue star anti-corrosion impeller. The standard flange structure enables fast bolt-on installation without thread matching trouble, while the top split glass cover allows easy disassembly for internal impeller replacement and sludge cleaning. It delivers real-time vertical top-down visual monitoring of fluid flow speed, pipeline clogging, medium cutoff and reverse flow, fully protecting large circulation pumps, industrial chemical reactors, main irrigation equipment and offshore seawater circulation systems from dry running, cavitation and permanent mechanical failure.
Every finished unit undergoes complete hydraulic burst pressure testing, salt spray corrosion aging testing, flange compression sealing leakage testing and high-low temperature alternating cycle validation before factory delivery, ensuring stable long-cycle continuous operation under seawater, weak acid/alkali, high-viscosity slurry and high-temperature fluid media worldwide.
2. Premium Technical Specifications
- Body Material: 304 / 316 stainless steel full CNC machining, matte brushed anti-corrosion finish; anti-rust, anti-scaling, seawater & mild chemical resistant, compliant with industrial pressure vessel standards
- Connection Standard: Standard flange end (customizable GB, ANSI, DIN flange standards), full size range DN25–DN200 customizable
- Sight Window: Thick-wall high-pressure resistant round borosilicate glass, 270° vertical top panoramic viewing without blind spots
- Fastening Structure: Four uniform stainless steel screws lock the top observation cover, balanced clamping force to avoid glass stress cracking under pipeline pressure fluctuation
- Sealing Assembly: Single/double-layer FKM fluororubber composite O-ring seal, resistant to acid, alkali, brine, industrial oils and low-viscosity chemical slurries
- Flow Indicator Core: Reinforced blue star multi-lobe impeller, ultra-sensitive to micro low flow for early flow-loss warning
- Nominal Working Pressure: PN16 standard grade; PN25 reinforced high-pressure marine customized version available
- Operating Temperature Range: -20℃ ~ +180℃
- Flow Channel Design: Full straight-through full-bore inner cavity, zero extra pressure drop, no internal dead zones for sediment accumulation
- Structural Feature: Integrated cylindrical main body with dual symmetrical flanges for pipeline butt installation, top quick-disassemble observation window for internal maintenance without removing the whole fitting from pipelines
3. Core High-End Industrial Advantages
3.1 Integrated CNC Polished Stainless Steel Cylindrical Body
One-piece seamless CNC machining eliminates casting pores and internal stagnant dead zones, ultra-smooth inner walls reduce medium adhesion and limescale buildup. Thickened flange and cylinder wall deliver outstanding pressure and water hammer resistance, perfectly fit heavy-duty factory, coastal vibration and offshore platform main pipeline environments.
3.2 Standard Universal Flange Connection Design
Dual symmetrical standard flanges support direct bolt butt joint with all industrial standard pipeline flanges, eliminating transition adapters, thread sealing leakage and welding work. Greatly shortens on-site construction time for large-bore trunk pipeline projects.
3.3 Top Quick-Disassemble Observation Cover
Four small uniform top screws allow opening the sight window without detaching the entire sight glass from the pipeline. Technicians can extract the impeller and clean sludge, fertilizer sediment and chemical scale rapidly, solving the difficult maintenance problem of large flange sight glasses for dirty viscous media.
3.4 270° Vertical Top-Down Panoramic Sight Window
Oversized round top borosilicate glass provides unobstructed vertical downward full-angle observation. Operators can clearly check impeller rotation, suspended solid impurities and air bubbles directly from above, ideal for horizontal main pipelines with limited side viewing space.
3.5 Full-Bore Zero Pressure Loss Unrestricted Flow Path
No internal protruding throttle structures create additional pressure loss; original pipeline design flow capacity is fully retained, perfectly matching low-loss flow control demands of factory central cooling mains, large chemical production trunk lines and marine main circulation systems.
3.6 Ultra-Sensitive Blue Star Multi-Blade Impeller Indicator
Bright blue star impeller creates high visual contrast against clear and turbid fluids, rapidly responding to tiny flow changes to warn of low flow, pipeline dry-up and reverse medium flow, preventing unplanned large-scale production shutdown and expensive pump breakdown losses.
3.7 Heavy-Duty FKM Fluororubber Anti-Corrosion Sealing System
Fluororubber composite seal combines high elasticity and wide chemical compatibility, resisting long-term erosion of salt spray, weak acid/alkali and temperature cycling, sustaining absolute zero-leak performance under year-round non-stop full-load operation in chemical plants and high-salt offshore environments.
3.8 Integrated Compact Flange Cylindrical Layout
Integrated cylinder-flange one-piece structure reduces overall installation length compared with split pull-rod flange sight glasses, saving horizontal layout space for densely arranged parallel main pipelines in equipment rooms and marine engine rooms.
4. Global Cross-Industry Application Scenarios
Heavy Industrial Manufacturing
Factory central circulating cooling water main pipelines, boiler large auxiliary trunk piping, central HVAC chilled & hot water circulation mains, machine tool large hydraulic oil trunk lines; flange quick installation suitable for large-bore industrial pipeline reconstruction projects, top disassembly convenient for regular cooling sludge cleaning to avoid pump dry-grinding and heat exchanger cavitation failure.
Chemical & Process Engineering
Conveyance trunk pipelines for weak acid, weak alkali, light chemical solvents and low-viscosity slurries, chemical intermediate circulation main lines; standard flange matching production line main pipes, periodic crystal sediment cleaning eliminates pipeline blockage and mass supply interruption accidents.
Modern Large-Scale Precision Agriculture
Farm large trunk water supply pipelines, greenhouse main nutrient solution circulation lines, regional central drip & sprinkler irrigation inspection mains; flange connection adapts to large agricultural water supply projects, easy maintenance to clear fertilizer sediment and guarantee uniform field irrigation distribution.
Offshore & Marine Engineering
Ship engine room main cooling circulation piping, offshore platform fresh & seawater auxiliary trunk lines, marine aquaculture large water recirculation systems; stainless steel anti-salt corrosion flange cylindrical construction adapts to coastal and open-ocean high-salt, humid, high-vibration main pipeline environments.
Supplementary Application Fields
Industrial large pure water treatment main equipment, commercial large solar thermal circulation trunk pipelines, fire protection main water supply lines, food-grade fluid transfer trunk pipelines.
5. Customized Engineering Support Service
- Material Customization: 304 stainless steel, 316 stainless steel, 316L marine anti-corrosion premium grade
- Flange Standard Customization: GB, ANSI, DIN, JIS flange standards, customizable flange size and bolt hole layout
- Pressure Grade Customization: Standard PN16, PN25 reinforced marine high-pressure variant, PN40 ultra-high pressure bespoke model
- Sealing Material Matching: EPDM for clean water media, FKM fluororubber for chemical oil & slurry transportation
- Brand & Packaging Customization: Laser engraved customer LOGO on cylindrical body, anti-collision neutral export wooden case packaging; third-party official pressure test reports and material certificates provided for tender documentation
- Caliber Customization: DN25, DN40, DN50, DN65, DN80, DN100 up to DN200 non-standard pipe diameters
6. Factory Premium Quality Control Standards
All WF-YL41 series flange stainless steel flow sight indicators implement mandatory 100% full inspection prior to shipment. Standard factory testing scope includes hydraulic burst pressure testing, flange face uniform compression sealing leakage testing, salt spray corrosion aging testing, impeller low-flow sensitivity testing and high-low temperature alternating cycle validation.
Complete stainless steel material certification, pressure vessel inspection reports and full test report packages can be supplied to support global large pipeline engineering tender reviews, offshore marine platform equipment audits and chemical plant safety compliance assessments.
Global Business Cooperation Contact
Manufacturer: Wenzhou Weifeng Technology Co., Ltd.
Official Website: www.alvifeng.com
