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High-Efficiency 38-Inch Dual-Surface Condenser | 34/45 Joints | Advanced Coolant Path
Manufacturer: Lab Glass
Condition: Used (Fully Inspected & Flow Tested)
Function: Heavy Refluxing & Extreme Gas-to-Liquid Condensation
Scale: Massive 38.19 Inches (970 mm) Overall Length
Internal Architecture: 11.8-Inch (300 mm) Dimroth Condensing Coil + Active Outer Cooling Jacket
Joint Configuration: 34/45 Top and Bottom Standard Taper Joints
When standard Liebig or Allihn condensers fail to tame highly volatile solvent vapors during aggressive reflux operations, adult scientists and process engineers in the scientific community turn to dual-surface cooling architecture. The Used Lab Glass 34/45 Jacketed Dimroth Coil Condenser is a towering, high-efficiency vapor trap engineered for absolute thermal devastation.
Measuring an impressive 38.19 inches (970 mm) in overall length with a massive 2.75-inch (70 mm) outer diameter, this borosilicate glass condenser features a specialized fluid path designed to maximize the delta-T (temperature differential). The coolant loop enters the top hose barb, floods the outermost containment jacket, and travels down to the bottom where it seamlessly transitions into the internal Dimroth condensing coil. The coolant then circulates through the inner coil before exiting the bottom hose barb. This unique "jacket-to-coil" flow path traps ascending hot vapors between two actively chilled surfaces, guaranteeing maximum solvent recovery and preventing vapor escape during intense pilot-scale synthesis.
| Feature / Metric | Specification |
| Manufacturer | Lab Glass |
| Product Type | Jacketed Dimroth Coil Condenser |
| Condition | Used (Inspected for structural integrity and fluid flow) |
| Overall Length | 38.189 inches / 970 mm |
| Column Outside Diameter (OD) | 2.756 inches / 70 mm |
| Internal Spiral Distance (Coil) | 11.811 inches / 300 mm |
| Top Joint Format | 34/45 Standard Taper Ground Joint |
| Bottom Joint Format | 34/45 Standard Taper Ground Joint |
| Coolant Flow Architecture | Top Barb -> Outer Jacket -> Bottom Bridge -> Inner Coil -> Bottom Barb |
| Primary Material | High-Clarity Heavy-Wall Borosilicate Glass |
The most distinguishing feature of this Lab Glass condenser is its interconnected cooling zones. Most condensers cool either the outer wall (Liebig) or an inner finger (Cold Finger). This unit does both sequentially. Coolant enters the top barb and floods the outer containment jacket. At the bottom of the column, an internal connection bridges the fluid directly into the central Dimroth coil. Finally, the fluid exits through the bottom hose barb. This surrounds the ascending vapor with a 360-degree wall of chilled glass while simultaneously forcing it to weave through the freezing internal spiral, resulting in a near-100% condensation rate.
Inside the massive 970mm column sits an 11.8-inch (300 mm) dense spiral coil. The Dimroth design is characterized by both the inlet and outlet of the internal coil being located at the same end (in this modified flow, transitioning at the base), but the crucial feature is the extended loop that drops deep into the vapor path. This ensures that the coldest part of the coil makes first contact with the hottest rising vapor, rapidly initiating the gas-to-liquid phase change before the vapor can expand.
This condenser is built for high-throughput, pilot-scale applications. The extremely wide 2.75-inch (70 mm) outer diameter provides a massive internal vapor chamber, preventing pressure buildup and vapor choking during aggressive boiling. The oversized 34/45 standard taper joints at both the top and bottom ensure a heavy-duty, leak-free connection to large-capacity receiving flasks, Soxhlet extractors, and distillation heads.
This highly specialized, pre owned condenser is explicitly designed for high-throughput continuous operations:
Aggressive Soxhlet Extractions: Providing the massive cooling power necessary to continuously reflux volatile solvents (like ether or hexane) without loss to the ambient fume hood.
Pilot-Scale Solvent Recovery: Rapidly reclaiming multi-liter volumes of synthesis solvents during rotary evaporation or bulk distillation.
Exothermic Reaction Control: Acting as an impenetrable vapor barrier directly above a reaction flask to condense boil-off during runaway exotherms.
High-Volume Essential Oil Processing: Condensing large volumes of steam and volatile terpenes efficiently in botanical extraction workflows.
An apparatus of this size and cooling capacity requires industrial-grade laboratory infrastructure to operate safely. Build out your high throughput system with fully compatible equipment from HiTechTrader:
High-Capacity Chillers: Drive freezing coolant through this massive jacket-to-coil path using our heavy-duty refrigerated circulators and chillers.
Heavy-Duty 34/45 Glassware: Safely mount this 38-inch condenser with compatible heavy-wall 34/45 boiling flasks, adapters, and Keck clips from our used laboratory equipment catalog.
Pilot Reactor Integration: Mount this high-efficiency vapor trap directly onto multi-liter laboratory reactors or jacketed Parr reactors for maximum reflux control.
Analytical Purity Verification: Validate the purity of your recovered solvents using our premium analytical instruments, featuring fully refurbished used GC-MS systems.
HiTechTrader offers this Used Lab Glass 38-Inch Jacketed Dimroth Coil Condenser fully inspected for structural integrity and fluid path continuity. Acquire extreme dual-surface condensing power without the immense capital costs and multi-month lead times of commissioning custom, oversized scientific glassware.
Contact HiTechTrader today to:
Request formal pricing and confirm immediate stock availability.
Verify 34/45 heavy-duty structural clamping and support compatibility.
Arrange secure, custom-crated domestic or international freight shipping for this oversized 970mm glass component.
What is a jacketed Dimroth coil condenser?
A jacketed Dimroth condenser is a highly efficient laboratory glass apparatus designed for aggressive gas-to-liquid condensation. It combines an outer cooling jacket with an internal spiral condensing coil. In this specific Lab Glass model, the coolant flows through the outer jacket first, then transitions into the internal Dimroth coil. This dual-surface cooling traps ascending vapor between an actively chilled outer wall and a freezing internal spiral, maximizing the temperature differential and ensuring total solvent recovery during intense refluxing.
Why use 34/45 joints on a condenser?
Standard taper 34/45 glass joints are significantly wider and more robust than ubiquitous 24/40 joints. They are utilized on oversized, high-throughput glassware, such as this 38-inch, 70mm OD condenser to accommodate massive volumes of rising vapor without creating a pressure bottleneck (choking), and to provide the physical structural strength required to safely support the heavy glass column in pilot-scale laboratory setups.
