All categories
Featured selections
Trade Assurance
Buyer Central
Help Center
Get the app
Become a supplier
Alibaba
Tools & Hardware
Hardware
Flanges
  • High Quality CF Quartz Viewport KF ISO CF Sight Glass Window Cf Viewport
  • High Quality CF Quartz Viewport KF ISO CF Sight Glass Window Cf Viewport
  • High Quality CF Quartz Viewport KF ISO CF Sight Glass Window Cf Viewport
  • High Quality CF Quartz Viewport KF ISO CF Sight Glass Window Cf Viewport
  • High Quality CF Quartz Viewport KF ISO CF Sight Glass Window Cf Viewport
High Quality CF Quartz Viewport KF ISO CF Sight Glass Window Cf Viewport

High Quality CF Quartz Viewport KF ISO CF Sight Glass Window Cf Viewport

  • 10 - 499 Pieces
    $99
  • >= 500 Pieces
    $69

Customization:

Customized logo（Min.Order: 50 pieces）
Customized packaging（Min.Order: 50 pieces）
Graphic customization（Min.Order: 50 pieces）
View product details

High Quality CF Quartz Viewport KF ISO CF Sight Glass Window Cf Viewport

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Industrial Monitoring: Equipped with a quartz or glass viewport for real-time visual inspection of fluid or material flow in pipes/vessels.
  • Corrosion-Resistant Construction: Built from polished stainless steel to withstand harsh environments, high pressure, and extreme temperatures in industrial processes.

Key features

  • 1. Material Technology

    • With corrosion-resistant stainless steel and high-temperature quartz viewport, you can ensure durability and visibility in harsh environments, outlasting standard steel flanges by 40%*.

  • 2. Interactive Design

    • With the integrated quartz viewport, you can monitor internal processes visually without interrupting operations, enhancing safety and efficiency compared to traditional opaque flanges*.

  • 3. Performance Parameters

    • With ISO-certified performance parameters, you can operate reliably under high-pressure and high-temperature conditions, outperforming non-certified models in durability and safety*.

  • 4. Scenario Solutions

    • With its design optimized for continuous operation in high-pressure environments, you can ensure seamless productivity in commercial applications like food processing or chemical manufacturing*.

  • 5. Certification Standards

    • With ISO certification, you can ensure compliance with global industrial standards, offering superior safety and reliability over non-certified alternatives*.

Product details

High Quality CF Quartz Viewport KF ISO CF Sight Glass Window Cf Viewport

The High Quality CF Quartz Viewport combines industrial-grade durability with advanced visibility features. Crafted from corrosion-resistant stainless steel and featuring an ISO-certified design, these flanges are engineered for high-pressure, high-temperature applications in chemical, pharmaceutical, and food processing industries. The transparent quartz window enables real-time monitoring without interrupting operations, while polished surfaces ensure hygiene and longevity.

Technical specifications

FeatureSpecificationBenefit
MaterialStainless Steel (316L grade)Corrosion resistance, high-temperature tolerance
Standard ComplianceISO CertifiedEnsures global regulatory compliance
Surface TreatmentPolishedReduced contamination risk, easy cleaning
Window MaterialQuartz GlassScratch-resistant, UV stable visibility
Pressure RatingUp to 50 bar (Customizable)Safe for heavy-duty industrial use

Customization guide

Adjustable parameters include flange diameter (50mm–250mm), pressure rating, and window material (e.g., borosilicate for cost-sensitive applications or sapphire for extreme clarity). Customize to meet ASME/EN standards or specific chemical resistance needs.

Get inspired

With the quartz viewport, operators can monitor fluid levels or reactions in real time—critical for quality control in sterile environments. The ISO-certified design ensures seamless integration into existing systems, while the polished surface simplifies cleaning in food-grade or pharmaceutical settings.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Pressure Rating30 bar45 bar (+50%)60 bar (+100%)
Temperature Range-20°C to 300°C-30°C to 400°C-40°C to 500°C
Window Thickness8mm10mm12mm (20% stronger)
Material GradeStainless Steel 304Stainless Steel 316Duplex 2205

Supplier's note

  1. Three Breakthroughs:

    • ISO Certification: Ensures compliance with global safety standards, reducing audit risks.
    • Quartz Window Clarity: 95% light transmission for precise visual inspections.
    • Polished Surface: Minimizes microbial adhesion, critical for pharmaceutical use.

  2. Optimal Version Selection:

    • Base Model: Ideal for food processing or low-pressure chemical storage.
    • Advanced Model: Suitable for pharmaceutical reactors requiring 400°C+ resistance.
    • Pro Model: Designed for oil & gas or high-pressure chemical plants—its Duplex 2205 material withstands chloride corrosion 3x longer than 316L.

With the Pro version’s 60 bar rating, you can safely handle extreme conditions, while the Advanced Model’s 10mm window ensures durability in abrasive environments. Choose based on your operational pressure, temperature, and material compatibility requirements.

Frequently asked questions

  • Which CF viewport model suits high-pressure chemical processing applications?

  • How do I clean the transparent quartz window on CF viewports?

  • Stainless steel vs carbon steel: Which viewport material is better for food-grade applications?

  • Can CF viewports be customized for specific flange sizes or pressure ratings?

  • Are these CF viewports ISO-certified for pharmaceutical use?

  • What is the maximum temperature rating for the quartz window in CF viewports?

  • How does the polished surface treatment benefit CF viewport maintenance?

  • Are there compact CF viewport models for small-scale lab equipment?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Material CompositionHarsh chemical environments, high-temperature applicationsIndustry Standard: Steel (ASTM A36, common in basic piping)
Our Base: 304 Stainless Steel (ASTM A240, resists mild acids) ▲
Our Advanced: 316L Stainless Steel (ASTM A276, withstands sulfuric acid) ▲▲		Base offers 50% better corrosion resistance than industry standard.
Advanced resists aggressive chemicals (e.g., chlorine).		Base may corrode in highly acidic conditions.
Advanced requires specialized maintenance.
Pressure RatingHigh-pressure pipelines (oil & gas, chemical processing)Industry Standard: 150 psi (ASME B16.5, low-pressure systems)
Our Base: 300 psi (handles industrial pressures) ▲
Our Advanced: 600 psi (extreme pressure tolerance) ▲▲		Base doubles industry standard capacity.
Advanced handles sudden pressure spikes.		Base may fail under rapid pressure changes.
Advanced adds weight due to thicker material.
Temperature ResistanceHigh-temperature furnaces, autoclavesIndustry Standard: Up to 400°C (ASTM E1461, moderate heat)
Our Base: 500°C (autoclave-safe) ▲
Our Advanced: 600°C (molten metal environments) ▲▲		Base operates 25% hotter than standard.
Advanced withstands extreme thermal stress.		Base may warp at prolonged 500°C.
Advanced requires thermal shielding for safety.
Surface TreatmentCleanrooms, food processingIndustry Standard: Bare metal (rust-prone in humidity)
Our Base: Polished (Ra ≤ 0.8 µm, reduced particulates) ▲
Our Advanced: Electropolished (Ra ≤ 0.4 µm, FDA-compliant) ▲▲		Base minimizes contamination.
Advanced meets food-grade standards.		Base may harbor microbes in wet environments.
Advanced needs frequent polishing.
VisibilityReal-time monitoring (pharmaceuticals)Industry Standard: Opaque/fog-prone glass (limited visibility)
Our Base: Tempered Quartz (ISO 719, clear under steam) ▲
Our Advanced: Borosilicate Glass (ASTM E133, thermal shock resistance) ▲▲		Base allows steam-resistant viewing.
Advanced resists thermal shock (ΔT 120°C).		Base windows may crack under sudden temperature shifts.
Advanced is more fragile.
Compliance StandardsRegulated industries (pharma, aerospace)Industry Standard: Basic ISO (e.g., ISO 7005)
Our Base: ISO 16001 (EU-compliant) ▲
Our Advanced: ISO 16001 + ASME BPVC (aerospace-qualified) ▲▲		Base meets EU regulations.
Advanced qualifies for global aerospace projects.		Base may not satisfy U.S. FDA requirements.
Advanced requires additional certification costs.

Product reviews

⭐ Customer Reviews and Testimonials

Authentic User Feedback

🔬 Laboratory User Reviews

⭐⭐⭐⭐⭐ Dr. Elena Martinez - Pharmaceutical R&D Lab
"We integrated the Advanced Model CF viewport into our reactor system for real-time monitoring of synthesis reactions. The quartz window clarity is outstanding—even under steam sterilization cycles, visibility remains sharp. The 316L stainless steel has shown zero corrosion after six months of exposure to aggressive solvents. Installation was seamless thanks to ISO 10280 compliance."

Purchase Date: February 2025 | Usage Period: 4 months

🏭 Industrial Processing User Reviews

⭐⭐⭐⭐⭐ James Whitaker - Chemical Plant Engineer
"Installed the Pro Model on a high-pressure chlorination line. With 60 bar rating and Duplex 2205 construction, it’s handling conditions that would eat through standard 316SS fittings. We’ve had two pressure spikes above 55 bar—no leaks, no deformation. The polished surface also makes inspection easier; no residue buildup even after prolonged operation."

Purchase Date: October 2024 | Usage Period: 7 months

🍺 Craft Brewing Enthusiast Reviews

⭐⭐⭐⭐☆ Daniel Park - Homebrew Lab & Small Batch Brewery
"I ordered a customized 50mm Mini Series viewport for my fermentation rig. It fits perfectly between KF flanges, and the 8mm quartz window gives me clear visibility during active fermentation. For a small-scale setup, having ISO-certified hygiene standards gives me confidence in batch consistency. Only downside: wish the base model came in more flange sizes off-the-shelf."

Purchase Date: January 2025 | Usage Period: 5 months

🌡️ High-Temperature Application Review

⭐⭐⭐⭐⭐ Maria Santos - Materials Testing Facility
"Using the Advanced Model in a high-temp autoclave environment (up to 400°C). The thermal stability of both the quartz glass and stainless steel frame is impressive—no clouding, warping, or loss of vacuum integrity. We previously used borosilicate viewports that cracked under thermal cycling; this one has lasted over 200 cycles with no issues."

Purchase Date: May 2024 | Usage Period: 8 months

🧪 Research & Development Review

⭐⭐⭐⭐⭐ Dr. Alan Foster - University Nanomaterials Lab
"Our team needed a reliable viewport for a custom CVD chamber. After comparing several suppliers, we chose the Pro Model for its 600°C tolerance and electropolished finish. The 12mm thick quartz window withstands plasma exposure without pitting. Customization support was excellent—engineers helped us match flange specs to our existing ASME-compliant system."

Purchase Date: November 2024 | Usage Period: 6 months

📊 Rating Statistics

Average Rating: 4.9/5 ⭐ (89 Reviews)

Detailed Rating Distribution:

  • ⭐⭐⭐⭐⭐ (5-star): 78 reviews (87.6%)
  • ⭐⭐⭐⭐☆ (4-star): 10 reviews (11.2%)
  • ⭐⭐⭐☆☆ (3-star): 1 review (1.1%)
  • ⭐⭐☆☆☆ (2-star): 0 reviews (0%)
  • ⭐☆☆☆☆ (1-star): 0 reviews (0%)

🏆 Industry Expert Recommendations

Industrial Hygiene Specialist Recommendation

Linda Chen, PE - Process Safety & Hygiene Consultant
"In audits across food, pharma, and chemical facilities, I consistently recommend ISO-certified viewports with polished stainless steel. This product line exceeds FDA and EU hygiene standards, and the Ra ≤ 0.8 µm surface finish significantly reduces biofilm risk. For regulated environments, the documentation and traceability are impeccable."

Vacuum Systems Engineer Recommendation

Thomas Reed - Senior Systems Engineer, Semiconductor Manufacturing
"For high-vacuum and UHV applications, visual access without compromising integrity is critical. The CF flange design here meets all necessary sealing specs, and the quartz-to-metal seal integrity has proven stable across repeated pump-down cycles. A reliable choice for precision industrial monitoring."

💬 Latest User Reviews

Recent 30-Day Review Highlights:

⭐⭐⭐⭐⭐ "Critical Upgrade for Our Line" - Rachel Lin (Pharmaceutical QA Manager)

Posted: 2 days ago

"Replaced aging carbon steel viewports with the Advanced Model. Immediate improvement in both cleanability and corrosion resistance. Passed our last FDA audit with zero non-conformances related to sight glass components."

⭐⭐⭐⭐⭐ "Exactly What We Needed" - David Kim (Pilot Plant Operations)

Posted: 1 week ago

"Ordered a set of 100mm flanged viewports with 10mm quartz. Delivery was fast, and every unit met spec. The real-time monitoring capability has reduced sampling frequency and improved process control."

⭐⭐⭐⭐☆ "Solid Build, Great Support" - Olivia Grant (Chemical Engineering Startup)

Posted: 3 weeks ago

"Used the Base Model for a low-budget pilot reactor. Performs well under 30 bar. Appreciated the customization guidance from the sales team. Would love a mid-tier option with 316SS at a lower price point."

🎯 Reviews by Use Case Category

🏥 Pharmaceutical & Medical Manufacturing (32 Reviews)

  • Average Rating: 4.9/5
  • Most Praised Features:
  • ISO 10280 certification (94% mentioned)
  • Sterilization compatibility (91% mentioned)
  • Electropolished surface for microbial control (88% mentioned)

🧪 Laboratory & Research Applications (28 Reviews)

  • Average Rating: 5.0/5
  • Most Praised Features:
  • High-temperature quartz stability (96% mentioned)
  • Compatibility with UHV systems (85% mentioned)
  • Precision flange alignment (93% mentioned)

🏭 Chemical & Oil & Gas Processing (19 Reviews)

  • Average Rating: 4.8/5
  • Most Praised Features:
  • Duplex 2205 corrosion resistance (95% mentioned)
  • High pressure rating (up to 60 bar) (90% mentioned)
  • Long service life in chloride-rich environments (87% mentioned)

🍷 Food & Beverage Production (10 Reviews)

  • Average Rating: 4.7/5
  • Most Praised Features:
  • FDA-compliant materials (100% mentioned)
  • Easy cleaning and reduced contamination risk (90% mentioned)
  • Steam and CIP cycle durability (80% mentioned)

Related searches

gear large steel forging inner ringanarkali long kurtis set for girlsdasani pure waterdasani pure water plasticorthodontic femoral intramedullary tibia surgical setlithium iron phosphate powderiron powder priceWPC exterior wall paneldog underwater treadmill stainless steel dogherbs natural tea black dried nutrionpvc broom head sticks for homePDC parking sensornautical walking stickdesigner handle walking stickcustomsmart wall socketrattan sofa chair rattan furniture bedroomfixed type flammable gas detectorgas detectorfine stitching trendy and stylish casual

The Product Description is generated by third-party, and Alibaba.com is not liable for any risks related to inaccuracies or the infringement of third-party rights.

The information in this Product Description may differ from the details on the product listing page on Alibaba.com. Additionally, the contents may not be updated in real-time with the product listing page on Alibaba.com, and there may be delays in reflecting the most updated information. The description on product listing page takes precedence. You shall not rely on this Product Description in making transaction decisions.

The comparison data is based on manufacturer information and industry standards. Actual results may vary depending on individual use cases. It is advisable to verify details with the supplier for the most accurate information.