Can Zunex produce quartz parts according to my drawing?

Yes. Custom processing to customer drawings is our core service. Send a PDF, DWG or STEP drawing with material grade, tolerances, surface finish and quantity, and our engineers will review manufacturability before quoting.

What is the difference between JGS1, JGS2 and JGS3 quartz?

JGS1 is synthetic fused silica with high transmission in the deep UV (about 185-2500 nm), JGS2 is fused quartz suited to UV-visible use (about 220-2500 nm) and JGS3 is infrared-grade fused quartz with low hydroxyl content for transmission up to about 3500 nm.

What temperature can fused quartz glass withstand?

Typical fused quartz can be used continuously at around 1100 °C and for short periods up to about 1300 °C, with a softening point near 1683 °C. Its very low thermal expansion gives excellent thermal shock resistance.

Which finishing processes do you offer?

We offer cutting, grinding, polishing, flame working and quartz laser finishing including precision drilling, grooving and cutting for plates, tubes and discs.

How fast do you respond to technical inquiries?

Our verified response rate is 100% with an average response time of two hours or less. Email info@zunexquartz.com with your drawing or specifications.

OEM/ODM Quartz Cold Trap Manufacturer & Supplier for the Jelgava market

Precision Quartz Ware

Featured Engineering Quartz Solutions & Cold Trap Precursors

Direct from our specialized Donghai manufacturing facility: explore high-temperature furnace tubes, optical grade windows, vacuum-grade bell jars, and custom twin tubes configured to European scientific specifications.

100%

Verified Response Rate

≤ 2h

Engineering Review Speed

43%

International Re-Order Rate

99.99%

High Purity SiO₂ Matrix

Technical Whitepaper

Engineering Principles of Quartz Cold Traps in High-Vacuum Systems

A critical metallurgical and thermodynamic comparison for vacuum systems engineers, pilot plant operators, and research directors across Jelgava and the wider Zemgale region.

In modern vacuum technology, the cold trap functions as the first line of defense between high-temperature reaction chambers and sensitive vacuum pumping infrastructure (turbomolecular pumps, scroll pumps, and rotary vane oil pumps). While conventional Borosilicate 3.3 glass has served general benchtop chemical apparatus for decades, severe operating environments demand an upgrade to synthetic fused silica and fused quartz (SiO₂). Zunex Quartz Products Co., Ltd. manufactures OEM/ODM fused quartz cold traps with continuous mechanical resilience up to 1100°C, zero risk of thermal shock cracking during liquid nitrogen immersion (-196°C), and negligible heavy metal outgassing under ultra-high vacuum (< 10⁻⁷ mbar).

Near-Zero Thermal Expansion

Fused quartz exhibits an extraordinarily low coefficient of thermal expansion (CTE) of 5.5 × 10⁻⁷ /°C, approximately one-sixth of borosilicate glass (33 × 10⁻⁷ /°C). This allows Jelgava lab operators to quench a cold trap directly from an oven into liquid nitrogen (-196°C) or dry ice/acetone baths (-78°C) without catastrophic shatter.

Chemical Inertness & Acid Resistance

Composed of ≥ 99.98% pure silicon dioxide, our fused quartz traps resist virtually all aggressive reagents, concentrated acids (including hot sulfuric, nitric, and hydrochloric acids), and volatile organic solvents commonly condensed during synthesis, with hydrofluoric acid being the sole notable exception.

Ultra-High Vacuum (UHV) Compatibility

Borosilicate contains fluxing elements (boron, sodium, potassium, aluminum oxides) that cause outgassing and micro-ion migration under molecular drag conditions. Fused quartz features non-porous vitreous density (2.20 g/cm³) with micro-void gas permeation rates up to three orders of magnitude lower than commercial soft glasses.

Thermodynamic Condensation Mechanics in Cryogenic Traps

The fundamental duty of a vacuum cold trap is to establish a localized saturation vapor pressure surface lower than the upstream process vessel. When condensable vapors (water vapor, solvent traces, pump oil backstreaming vapors, acid mists) traverse the annular geometry of our dual-chamber Dewar quartz traps, heat is rapidly drawn out across the precision ground quartz wall. Because fused quartz retains structural rigidity up to its softening point (~1683°C) and annealing temperature (~1215°C), custom traps can be baked out in situ with radiant heat guns to desorb stubborn organic volatiles before initiating sub-zero condensation cycles.

Regional Market Context

Quartz Cold Trap Applications Across Jelgava’s Industrial & Academic Clusters

How high-purity quartz traps safeguard process efficiency, vacuum equipment longevity, and environmental regulatory compliance in Jelgava, Latvia.

Bio-Refining & Food Extraction Pilots

In partnership with agricultural chemistry researchers and pilot bio-ethanol plants around Jelgava, quartz cold traps isolate sub-zero terpenes, ethanol distillates, and volatile plant lipids without leaching alkali ions into pure extracts.

Vacuum Lyophilization & Pharma Freeze-Drying

Local chemical and biotechnical labs require cryogenic quartz condensers upstream of oil-sealed rotary pumps to freeze water vapor down to -80°C, preventing oil emulsification and vacuum degradation in continuous cycles.

LBTU Analytical Research & Synthesis

Laboratories at Latvia University of Life Sciences and Technologies utilize custom Schlenk line quartz cold traps to capture aggressive organometallic vapors and fluorinated solvents during air-sensitive chemical syntheses.

Rotary Evaporation & Solvent Reclamation

Manufacturing facilities handling volatile hazardous reagents integrate double-walled vertical quartz cold traps cooled by continuous glycol chillers, maximizing reclaim yield while complying with EU IPPC emission thresholds.

Material Science Matrix

Fused Quartz vs. Borosilicate 3.3 for Cold Trap Fabrication

Empirical mechanical, thermal, and optical baseline metrics verified through Chinese National Crystal & Quartz Inspection Standards and international ISO/DIN norms.

Physical / Chemical Property	Zunex Fused Quartz (JGS2 / Semiconductor Grade)	Standard Laboratory Borosilicate 3.3	Operational Impact for Jelgava Engineers
Silicon Dioxide (SiO₂) Content	≥ 99.99% by weight	~ 81.0% (balance B₂O₃, Na₂O, Al₂O₃)	Zero heavy metal leaching into condensed high-purity samples.
Continuous Service Temperature	1100 °C	450 °C - 500 °C	Supports high-temperature vapor traps and direct torch flame bakeouts.
Short-Term Peak Temperature	1300 °C	520 °C	Withstands direct exothermal hot gases without plastic deformation.
Thermal Expansion Coeff. (CTE, 20-300°C)	5.5 × 10⁻⁷ /°C	33 × 10⁻⁷ /°C	Sixfold greater thermal shock resistance; uncrackable by liquid N₂.
Softening Point	~ 1683 °C	~ 820 °C	Trap joint geometries will not warp during intense vacuum bakeout.
Dielectric Constant (at 1 MHz)	3.75 - 3.80	4.60 - 4.90	Superior RF/Microwave transparency for plasma-assisted traps.
Spectroscopic Range Transmission	185 nm - 3500 nm (JGS1/JGS2/JGS3 dependent)	320 nm - 2500 nm	Allows in-line UV/VIS spectroscopic tracking of condensed film layers.

Market Trends

Procurement Modernization in the Jelgava & Baltic Vacuum Sectors

Strategic dynamics transforming cold trap specifications from legacy European standard borosilicate to customized Chinese high-purity fused silica glass.

Transition to ISO-KF Quick-Clamp Flanges

Jelgava procurement managers are progressively replacing fragile conical ground joints (such as NS 29/32) with stainless steel to fused quartz graded seals or direct quartz KF25/KF40 flanges. This simplifies integration with modern dry scroll and turbomolecular vacuum pump ports, cutting leak rates below 1 × 10⁻⁹ mbar·l/s.

Automated Closed-Loop Cryo-Trapping

Due to rising industrial gas costs in the Baltic region, laboratory pilot lines are turning away from manual liquid nitrogen top-ups toward mechanical closed-loop cryocoolers. Custom fused quartz inner-well traps, manufactured by Zunex with micro-millimeter tolerance, fit cold fingers seamlessly with high thermal conductance.

Strict EU VOC & Worker Safety Compliance

Under tightening European Chemical Agency (ECHA) and REACH guidelines, industrial plants in Jelgava require secondary safety cold traps to arrest volatile carcinogenic vapors before vacuum exhaust meets municipal ductwork. Fused quartz ensures zero pinhole pitting even during months of continuous corrosive exposure.

Factory Capabilities

Why Jelgava Engineers Partner with Zunex Quartz

Engineered in Donghai County—China’s premier quartz capital—backed by third-party verified Alibaba manufacturing credentials and responsive European logistics.

Tailored to CAD / STEP Drawings

From single prototype units for academic research to multi-hundred unit batches for OEM machine integrators, our glassblowing and CNC technicians fabricate directly to your PDF, DWG, or 3D STEP drawings with tolerances within ±0.05 mm.

Advanced Laser Precision Finishing

Equipped with laser drilling, CNC core grooving, and precise torch flame-polishing, we create leak-free glass transitions, threaded GL connectors, ground standard tapers (NS 14/23, 29/32, 45/40), and vacuum O-ring grooves free of micro-cracks.

≤ 2-Hour Response Time

We maintain an audited 100% inquiry response rate with an average turnaround under two hours. Jelgava technical buyers receive rapid manufacturability feedback and transparent factory-direct pricing without distributor overhead.

Zero-Breakage Baltic Packaging

Fragile quartz equipment requires specialized export transit. Every order bound for Latvia is cushioned in custom-molded high-density EPE foam, moisture-sealed in anti-static sleeves, and crated in heavy-duty plywood cases with air freight tracking to Riga.

Procurement Guide

Frequently Asked Questions for Jelgava Buyers

Clear technical, logistic, and regulatory answers addressing common questions from Latvian vacuum engineers and procurement officers.

What are the key design choices when specifying an OEM quartz cold trap?

When commissioning an OEM trap, specify: (1) Geometric architecture—two-piece demountable trap with ground flange or single-body annular immersion dewar; (2) Connection joints—standard ground tapers (e.g., NS 29/32, NS 45/40), threaded GL screw joints with PTFE caps, or direct quartz ISO-KF flanges (KF16/KF25/KF40); (3) Purity grade—semiconductor JGS1/JGS2 synthetic fused quartz for minimal outgassing; (4) Condensate volume—typically 150 ml to 2000 ml depending on pumping CFM and process duration; and (5) Bypass valve integration—vacuum stopcocks for draining condensates without breaking system vacuum.

Can Zunex fabricate custom traps to our internal CAD or university drawing?

Yes. Custom fabrication from engineering drawings is our core focus. We work directly with engineers at scientific institutes, industrial testing laboratories, and vacuum system builders in Jelgava. You can provide a CAD file (STEP, IGES, DWG) or a dimensioned PDF. Our engineering team reviews wall thicknesses, stress-relief annealing requirements, and port geometries, returning full DFM (Design for Manufacturability) notes within two hours.

How do quartz cold traps perform under rapid liquid nitrogen cycling?

Because fused quartz has a low coefficient of thermal expansion (5.5 × 10⁻⁷ /°C), it can withstand instantaneous temperature deltas exceeding 1000°C without crack propagation. You can safely immerse an ambient temperature quartz trap directly into liquid nitrogen (-196°C) or thaw a frozen trap with a heat gun to recover trapped solvents. Borosilicate glass often suffers structural failure under equivalent thermal cycling.

What customs paperwork, tariffs, and CE compliance apply for delivery to Latvia?

Shipments to Jelgava clear through customs at Riga International Airport or Baltic marine terminals under Harmonized System (HS) Code 7017.10 (Laboratory, hygienic or pharmaceutical glassware, whether or not graduated or calibrated, of fused quartz or other fused silica). We supply full commercial invoices, clean Bills of Lading / Airway Bills, packing lists with net/gross weights, and Certificates of Conformity (CoC) verifying 99.99% SiO₂ purity for smooth clearance under EU customs regulations.

How does Zunex prevent transit breakage on shipments to Jelgava?

Quartz glassware requires specialized transit packaging. Each finished cold trap undergoes visual inspection and ultrasonic cleaning before being wrapped in anti-static stretch film and nestled into custom CNC-profiled Expanded Polyethylene (EPE) foam cushioning. The foam assembly is packed in dual-wall corrugated inner cartons, then secured in a steel-banded, fumigated plywood export case. We ship via express air (DHL, FedEx, UPS) directly to your door in Jelgava with zero-breakage replacement commitments.

What is the minimum order quantity (MOQ) and production lead time?

We support prototypes and experimental setups with an MOQ of just 1 piece for custom-drawn quartz cold traps. For production runs, we scale up to batches of 500+ units. Prototype and small-batch fabrication typically takes 7 to 12 working days, followed by 4 to 6 days for express air freight delivery to Jelgava.

OEM/ODM Quartz Cold Trap Manufacturer & Supplier for the Jelgava Market