WF-FQ11-20N,Products,Wenzhou WeiFeng Technology Co., Ltd.

1. Product Overview

WF-FQ11-20N four-way cross internal thread float ball sight flow indicator is a multi-port heavy-duty inline visual flow monitor independently developed by TechWF. It adopts integrated precision cast 304 stainless steel four-way cross body with four symmetrical BSP/NPT internal thread ports, top detachable thick borosilicate sight window and dual-color anti-corrosion floating ball indicator. It supports cross multi-directional pipeline layout and all-angle fluid observation, widely deployed in sanitary light chemical, industrial multi-circulation cooling, large-scale agricultural multi-branch irrigation, yacht and coastal marine four-branch threaded auxiliary pipeline systems.

This sight glass is integrally cast from seamless 304 stainless steel cross body, four identical full internal thread ends allow arbitrary cross horizontal/vertical pipeline connection. The top snap-on transparent sight cavity is equipped with two high-contrast colored PP float balls; fluid buoyancy lifts the float balls when medium flows normally, while float balls sink to the bottom under cut-off or backflow state, enabling operators to quickly judge pipeline flow status, empty pipe and reverse flow. It provides one-piece multi-channel flow monitoring solution to reduce pipeline fitting count, leakage points and overall engineering cost, perfectly protecting multi-circulation cooling pumps, multi-channel dosing pipelines, farm cross irrigation equipment and ship four-loop cooling systems from dry-running and cavitation damage.

All finished units pass hydraulic burst pressure testing, salt spray anti-corrosion aging testing, thread sealing leakage testing and hot-cold alternating cycle validation before factory delivery, maintaining stable zero-leak continuous operation under purified water, glycol, weak acid/alkali and low-salinity seawater media worldwide.

2. Premium Technical Specifications

Body Material: 304 stainless steel precision casting, matte passivated anti-rust finish, compliant with food contact and marine anti-salt corrosion standards
Connection Standard: Four-way symmetrical full internal thread (BSP / NPT), customizable sizes DN15~DN50
Sight Window: Thick-wall impact-resistant round borosilicate top glass, 270° vertical panoramic observation without visual blind spots
Indicator Core: Dual-color PP floating balls, lightweight, acid & alkali resistant, floats upward with medium flow buoyancy
Sealing Assembly: Single-layer EPDM / FKM composite O-ring gaskets; EPDM for clean water & edible media, FKM for weak solvent & brine media
Nominal Working Pressure: PN16 standard grade; PN20 reinforced marine high-pressure version optional
Operating Temperature Range: -10℃ ~ +120℃
Flow Channel: Four-way cross full-bore inner cavity, zero extra pressure drop, smooth polished inner wall reduces organic residue, crystal and fertilizer sediment adhesion
Structural Feature: Integrated four-way cross threaded body, thread lock top glass cover, fully disassemblable to extract float balls for deep flushing without pipeline disassembly

3. Core High-End Competitive Advantages

Integral Seamless Cast 304 Stainless Steel Four-Way Cross Anti-Corrosion Body

One-piece seamless precision casting eliminates casting pores and internal stagnant dead zones. Four symmetrical cross internal thread ports realize horizontal + vertical cross multi-direction pipeline layout, a single four-way sight glass replaces multiple single straight sight glasses, cutting fitting inventory, connection points and construction cost. Matte passivation delivers outstanding rust resistance in humid indoor and coastal weak salt fog environments; smooth seamless inner surface avoids medium sediment buildup, superior to brass fittings for weak acid and saltwater working conditions.
Universal Symmetric Four-Way Full Internal Thread Multi-Angle Installation

Four identical standard internal threads on all four ports support arbitrary cross bidirectional assembly, compatible with all mainstream industrial threaded pipe fittings without transition nipples, drastically shortening construction cycles for complex cross multi-branch trunk pipeline networks.
Dual-Color Float Ball High-Contrast Intuitive Flow Visualization

Two distinct red & blue float balls form sharp visual contrast against clear transparent glass, easy to identify flow state even from long distance. No complex springs, swing paddles or dial components; buoyancy-only drive structure delivers ultra-low failure rate and long service life.
Zero Pressure Loss Four-Way Cross Full-Bore Unrestricted Flow Path

No protruding throttle obstacles inside the cross cavity, fully retains original pipeline flow capacity, meeting low-loss flow control demands of industrial multi-circulation cooling, multi-channel fine chemical delivery and farm cross-branch irrigation threaded trunk systems.
Chemical-Inert Lightweight Dual Float Ball Assembly

PP float balls resist weak acid, alkali and light saltwater erosion, ultra-lightweight sensitive response to tiny flow changes, no jamming or sticking after long-term 24-hour continuous operation.
Threaded Snap-On Top Cover Low-Maintenance Design

Thread locking top cover can be manually unscrewed without special tools, quickly take out dual float balls to flush accumulated limescale, fertilizer sludge and oil deposits, convenient regular routine maintenance and CIP online cleaning.
Compact Four-Way Cross Multi-Port Space-Saving Integrated Layout

One-piece four-way cross threaded structure saves horizontal linear layout space for dense cross multi-directional parallel main pipelines in chemical workshops, equipment cooling cabinet and compact yacht engine room piping racks.
Simple Robust Low-Failure Mechanical Structure

Only two moving float balls without fragile elastic or rotating parts, minimal failure points, stable continuous operation for long-term industrial multi-loop production lines.

4. Global Cross-Industry Application Scenarios

Sanitary Light Fine Chemical Industry

Multi-branch purified water circulation cross threaded pipelines, multi-channel neutral solvent delivery trunk lines, cosmetic raw material cross-loop dosing mains; four-way multi-port design simplifies complex clean room cross pipeline networks, reducing leakage risk and fitting quantity.

Industrial Multi-Circulation HVAC & Equipment Cooling

Machine tool cross multi-loop cooling threaded pipelines, injection molding multi-channel auxiliary circulation lines, building central heating cross branch water pipes, solar multi-loop hot water auxiliary tubing; compact cross body fits narrow equipment cabinet internal installation space.

Large-Scale Precision Agriculture

Regional farm cross multi-branch water supply threaded trunk pipelines, greenhouse four-channel nutrient solution circulation mains, centralized cross multi-row sprinkler irrigation inspection lines; integrated four-way structure lowers procurement cost for large farm cross-branch water treatment threaded pipeline projects.

Offshore & Yacht Coastal Light Marine Anti-Corrosion Engineering

Ship four-loop auxiliary cooling circulation threaded piping, offshore platform four-channel desalination auxiliary trunk lines, marine aquaculture cross multi-branch low-salinity brine recirculation pipelines; 304 stainless steel passivation layer withstands ocean salt fog and seawater splash corrosion, meeting long-term marine service standards.

Supplementary Auxiliary Fields

Large commercial solar multi-loop hot water circulation threaded trunk pipelines, fire protection cross multi-branch main water supply threaded lines, industrial pure water pretreatment four-channel threaded main equipment.

5. Customized Engineering Support Service

Material Customization: Standard 304 stainless steel, upgrade to 316 / 316L marine high anti-corrosion sanitary grade
Thread Standard Customization: Custom BSPP, BSPT, NPT internal thread specifications and pressure class
Pressure Grade Customization: PN16 standard, PN20 marine high-pressure reinforced variant
Sealing Material Matching: Food-grade EPDM for water & edible media, FKM fluororubber upgrade for weak acid/alkali organic solvent transportation
Brand & Packaging Customization: Laser engraved customer LOGO on four-way cross body, anti-collision neutral export wooden case packaging; complete material & pressure test certificates provided for tender documentation
Caliber Customization: DN15, DN20, DN25, DN32, DN40, DN50 non-standard threaded sizes available

6. Factory Premium Quality Control Standards

All WF-FQ11 series four-way cross threaded float ball sight indicators implement mandatory 100% full inspection prior to shipment. Standard factory testing items include hydraulic burst pressure test, four-port thread uniform compression sealing leakage test, salt spray long-cycle anti-corrosion aging test, float ball flow sensitivity test and cold-hot alternating cycle validation.

Complete stainless steel material certification, sanitary inspection reports and full pressure vessel test packages can be supplied to support global heating, light chemical, agricultural and coastal marine engineering tender reviews, offshore platform equipment audits and food factory sanitary compliance assessments.