Factory Catalog
Precision Engineered Quartz Components for Export
Manufactured from top-tier raw silica with proprietary hot-forming and cold CNC laser finishing. Every batch is rigorously certified for dimensional compliance, optical purity, and high-temperature thermal durability before dispatch.
Regional Integration
Quartz Discs in Porto’s Industrial Ecosystem
The Metropolitan Area of Porto and the wider Norte Region are undergoing an intensive industrial modernization. From high-throughput pharmaceutical reactors in Maia to laser-assisted tooling in Vila Nova de Gaia, custom fused quartz discs deliver unmatched chemical neutrality, ultra-low thermal expansion, and precision UV-IR transmission.
Pharma & Chemical Flow Cells
The pharmaceutical cluster in Matosinhos and Maia relies on quartz sight-glass discs for corrosive inline spectroscopic monitoring. Unlike borosilicate, our JGS1 quartz discs resist attack from concentrated hydrochloric, sulfuric, and organic solvents at extreme temperatures without leaching trace elements into sterile active pharmaceutical ingredients (APIs).
In-line Spectroscopy
Zero Alkaline Leaching
DIN EN 1595 Compliant
Academic & Nanotechnology Labs
Collaborating with entities tied to the University of Porto (UPorto), FEUP, and the Iberian Nanotechnology Institute (INL) in the northern corridor, our double-side polished synthetic silica wafers serve as optical substrates for thin-film sputtering, electron beam evaporation, and deep-UV laser ablation testbeds.
Surface Quality: 20/10 Scratch-Dig
TTV < 3µm
185–2500nm Bandwidth
Advanced Machinery & Laser Optics
Machinery fabricators across Santo Tirso, Famalicão, and Guimarães integrate our quartz protection discs into high-power fiber laser cutting heads and industrial drying ovens. With thermal shock resistance exceeding 1100°C to cold water quenching, our viewports safeguard sensitive sensors from spatter and catastrophic blowout.
Thermal Shock: ΔT > 1000°C
High Damage Threshold
AR Coating Available
Material Intelligence
Engineering Grade Comparison for B2B Importers
Selecting the proper silica matrix prevents costly optical degradation and thermal failure. Review how our core synthetic and fused grades perform under laboratory and high-load production environments.
| Material Grade | SiO2 Purity | Transmission Band | OH Content | Continuous Operating Temp | Key Industrial Applications |
|---|---|---|---|---|---|
| JGS1 (Synthetic Silica) | ≥ 99.999% | 185 nm – 2500 nm (Deep UV) | ≤ 1200 ppm | 1100 °C | Excimer lasers, semiconductor lithography wafers, high-end UV flow cells. |
| JGS2 (Fused Quartz) | ≥ 99.99% | 220 nm – 2500 nm (UV-VIS) | ≤ 30 ppm | 1150 °C | Industrial viewport discs, sight glasses for autoclaves, high-temperature boilers. |
| JGS3 (Infrared Quartz) | ≥ 99.99% | 260 nm – 3500 nm (VIS-IR) | ≤ 5 ppm (Water-free) | 1150 °C | Mid-to-Far Infrared pyrometer windows, gas monitoring ports, thermal chambers. |
| Borosilicate (Standard Reference) | ~ 80% | 350 nm – 2000 nm | Variable | 450 – 500 °C | Standard commercial sight glass (unsuitable for >500°C thermal shock or deep UV). |
Laser CNC Profiling
Non-contact laser beam trepanning eliminates edge micro-fractures, boosting physical burst pressure by up to 35% compared to conventional mechanical grinding wheels.
Double-Side Lapping
Planar mechanical polishing delivers surface flatness up to λ/4 per 25mm diameter and parallelism ≤ 10 arcseconds for interference-free optical setups.
Custom Beveling & Stepped Steps
Precision stepped discs, custom o-ring sealing grooves, and 45-degree chamfers machined to tolerances within ±0.02 mm to match European flange dimensions.
Vacuum Annealing Cycles
Rigorous multi-stage thermal annealing dissipates internal strain birefringence, safeguarding sight windows against pressure fatigue under cyclical autoclave operations.
Enterprise Superiority
Direct Crystal Capital Manufacturing with Global Logistics Agility
Headquartered in Donghai County, China's world-recognized silicon resource base, Zunex Quartz Products Co., Ltd. consolidates raw material refinement, flame melting, and CNC finishing within a singular quality-controlled complex. By eliminating secondary intermediaries, we pass on an average of 25–40% procurement savings to Portuguese procurement managers.
Our logistical bridge to Porto integrates direct air-cargo routes to Francisco Sá Carneiro Airport (OPO) for rush prototypes and ocean freight consolidation direct to the Port of Leixões for scheduled volume replenishments. Every shipment is enclosed in custom vibration-dampening expanded EPE vaults and vacuum-sealed nitrogen foils, ensuring absolute zero transit breakage.
100%
Inquiry Response Rate
≤ 2h
Engineering Review Speed
43%
Repeat-Order Retention
±0.02mm
Precision CNC Tolerance
Macro Trends
Emerging Demand Trends in Northern Portugal's Precision Industries
Evaluating the economic, technical, and regulatory shifts driving the transition toward high-purity quartz glass across Portugal’s northern industrial spine.
Clean Energy & Green Hydrogen
With Portuguese decarbonization initiatives gaining steam in regions like Sines and Porto's coastal industrial zone, high-temperature quartz discs and reactors are progressively adopted in polymer electrolyte membrane (PEM) electrolyzers and solar thermal test stations due to their stability against hydrogen embrittlement.
Automotive Sensor Assembly
The automotive component belt extending from Vila Nova de Cerveira to Palmela requires precision optical quartz covers for LiDAR, laser distance measurement sensors, and automated weld inspection systems, which demand high optical transmission unaffected by severe environmental temperature cycling.
Stringent EU Regulatory Alignments
Under EU REACH and RoHS mandates, manufacturing facilities in Porto are substituting toxic or fluorinated glass additives with 100% natural, bio-inert quartz glass. This provides completely inert properties for high-purity bioprocessing, food-grade sterilization viewports, and cleanroom containment.
Knowledge Base
Frequently Asked Questions by Porto Procurement Specialists
Clear, direct answers regarding custom drawings, export compliance, shipping timelines, and technical tolerances.
Can Zunex manufacture custom quartz discs based on our CAD drawings or specific DIN/ISO norms?
Yes, custom manufacturing to CAD drawings (DWG, DXF, STEP) and PDF engineering prints is our primary business model. We routinely process discs according to standard European DIN sight glass dimensions as well as bespoke configurations featuring precision stepped rims, laser-drilled micro-orifices, polished chamfers, and tight diameter tolerances up to ±0.02 mm.
What is the standard lead time and logistics method for delivery to Porto and northern Portugal?
Prototyping and custom machining typically require 7 to 12 working days depending on surface finish (commercial polish vs. optical pitch polish). For urgent shipments, express courier delivery (DHL/FedEx/UPS air express) to Porto (OPO) takes 4 to 6 business days. For volume bulk orders, ocean freight consolidation to the Port of Leixões takes approximately 28 to 35 days, with complete customs documentation provided (Commercial Invoice, Packing List, Certificate of Origin, Material Mill Test Reports).
How do we verify the transmission characteristics between JGS1, JGS2, and JGS3 quartz discs before buying?
Every production run is tracked with spectrophotometer transmission curve validation. JGS1 is pure synthetic fused silica optimal for deep ultraviolet tasks (185–2500 nm), free of bubbles and inclusions. JGS2 is optical fused quartz suited for general UV-VIS viewports (220–2500 nm). JGS3 features near-zero hydroxyl content (≤ 5 ppm OH), eliminating the 2.73 µm absorption dip to provide maximum transparency across the infrared spectrum up to 3500 nm. Certified spectral transmission graphs accompany your delivery upon request.
How do you guarantee that fragile quartz discs and tubes arrive without transit damage?
We employ an engineered export packaging protocol refined over thousands of international deliveries. Each disc is clean-wiped and sealed in protective peelable film or dust-free lens paper, nested within custom high-density CNC-milled EPE foam enclosures, and secured in heavy-duty export-grade plywood crates with moisture barriers and shock-indicator labels. We accept full transit liability—any item damaged in transit is remanufactured and dispatched via priority air without delay.
What are the minimum order quantities (MOQs) and payment options for Portuguese companies?
We have no prohibitive MOQs for custom engineered items; we support universities and R&D groups with single-piece prototype runs, as well as OEM manufacturers with multi-thousand recurring batch orders. Payment can be settled via international telegraphic transfer (T/T), credit terms for verified repeat partners, or secure trade escrow.
Accelerate Your Engineering Schedule with Factory-Direct Quartz
Send your dimensional drawings, required optical transmission band, or autoclave pressure parameters. Our senior application engineers will review your request and supply a formal DFM analysis and quotation within 2 hours.