Introduction
Low temperature circulating chillers are refrigeration systems used to provide a circulating fluid at the low temperatures, for the cooling of the equipment and the processes, and they are used in the laboratories, the industry, the medical, and the research for the temperature control at the low temperatures. The low temperature circulating chiller consists of a refrigeration system with a compressor, a condenser, an evaporator, a circulating pump, a temperature control system, and a bath or a reservoir for the circulating fluid, and it cools the fluid, such as the water or the water-glycol mixture, to the low temperatures, and it circulates the cooled fluid through the external equipment or the process that requires the cooling; the low temperature circulating chiller provides a stable and a precise temperature, with features such as the digital temperature control, the circulation control, and the safety, and it is used for the cooling of the reaction vessels, for the cooling of the condensers, for the cooling of the analytical instruments, such as the spectrometers and the electron microscopes, for the cooling of the lasers, for the temperature control of the processes, and for many other applications, and it is available in various cooling capacities and temperature ranges, from the models for the moderate cooling to the models for the deep cooling, with features such as the various pump capacities; the low temperature circulating chiller is an essential equipment for the temperature control in the many applications. Low temperature circulating chillers are used in the laboratories, in the chemical and the pharmaceutical industry, in the medical facilities, in the research, and for many other applications. With their low temperature cooling, low temperature circulating chillers are essential for the temperature control.
Low Temperature Circulating Chiller LLTC-T2015
Low Temperature Circulating Chiller an operating temperature range of -80°C to -50°C supporting industrial cooling. It maintains temperature stability essential for precision processes...
Low Temperature Circulating Chiller LLTC-T2014
Low Temperature Circulating Chiller a circulation pump with a maximum flow of 11m³/h at 2 bar, enhancing efficiency. The system maintains stable and reliable cooling output. It offers e...
Low Temperature Circulating Chiller LLTC-T2013
Low Temperature Circulating Chiller a circulation pump with a maximum flow of 6.5 m³/h at 2 bar, enhancing heat transfer efficiency. Its stainless steel internal piping resists corrosio...
Low Temperature Circulating Chiller LLTC-T2012
Low Temperature Circulating Chiller a temperature control accuracy of ±0.5°C ensures stable cooling. Its low maintenance requirements minimize operational downtime in busy labs. The un...
Low Temperature Circulating Chiller LLTC-T2011
Low Temperature Circulating Chiller a maximum circulation pump capacity of 3.4m3/h at 2 bar for optimal cooling performance. It utilizes eco-friendly refrigerants to support sustainable ...
Low Temperature Circulating Chiller LLTC-T2010
Low Temperature Circulating Chiller a wide temperature range from -80℃ to -50℃ providing versatile cooling. The chiller uses a brand compressor for reliable long-term performance. It i...
Low Temperature Circulating Chiller LLTC-T2015
Low Temperature Circulating Chiller a Cooling Capacity at -55°C of 25.1 kW for optimal cooling. Its multi-stage filtration system ensures maximum refrigerant purity. The system includes...
Low Temperature Circulating Chiller LLTC-T2014
Low Temperature Circulating Chiller a Circulation Pump Max of 10m3/h 2 bar for optimal management. It minimizes downtime with stable and automated cooling cycles. The system features a r...
Low Temperature Circulating Chiller LLTC-T2013
Low Temperature Circulating Chiller a high cooling capacity of up to 17.5 kW at -40°C for efficient temperature management. The chiller features user-friendly controls for easy operatio...
Low Temperature Circulating Chiller LLTC-T2012
Low Temperature Circulating Chiller reliable temperature Control of ±0.5°C ensuring optimal cooling. Its advanced thermal regulation maintains process integrity for sensitive applicati...
Low Temperature Circulating Chiller LLTC-T2011
Low Temperature Circulating Chiller a temperature range of -60°C to -30°C ensuring efficient cooling. It provides high-efficiency heat transfer for optimal performance. The system cons...
Low Temperature Circulating Chiller LLTC-T2010
Low Temperature Circulating Chiller features a high-capacity circulation pump of 2.4m3/h 2 bar for optimal cooling. It features a plate heat exchanger that enhances heat transfer efficie...
Low Temperature Circulating Chiller LLTC-T2015
Low Temperature Circulating Chiller a cooling capacity of 32.4 kW at -20°C for optimal cooling. It maintains stable temperatures for sensitive processes and experiments. Its compact siz...
Low Temperature Circulating Chiller LLTC-T2014
Low Temperature Circulating Chiller a high-capacity circulation pump delivering up to 6.8 m³/h at 2 bar for optimal cooling. The controller ensures precise system regulation at all stag...
Low Temperature Circulating Chiller LLTC-T2013
Low Temperature Circulating Chiller a temperature range of -45°C to 20°C for efficient cooling. Its multi-stage cooling process ensures uniform temperature and coolant distribution. It...
Low Temperature Circulating Chiller LLTC-T2012
Low Temperature Circulating Chiller offers a Cooling Capacity of 14.8 kW at -20°C for optimal cooling. It incorporates safety alarms to help prevent system over-temperature or faults. I...
Low Temperature Circulating Chiller LLTC-T2011
Low Temperature Circulating Chiller offers a high-performance circulation pump delivering up to 2.4 m³/h at 2 bar for diverse cooling needs. The system is designed for continuous and st...
Low Temperature Circulating Chiller LLTC-T2010
Low Temperature Circulating Chiller a temperature range from -45°C to 20°C, delivering precise temperature control. The stainless steel reservoir resists corrosion and maintains sanita...
Low Temperature Circulating Chiller LLTC-T2015
Low Temperature Circulating Chiller style="background-color:white;color:black;">temperature control of ±0.5°C for optimal cooling. It incorporates advanced refrigerant technology for i...
Low Temperature Circulating Chiller LLTC-T2014
Low Temperature Circulating Chiller a Circulation Pump with a flow rate of 15m3/h 2 bar for optimal cooling. Its heat-resistant construction enhances durability during continuous use. It...
Low Temperature Circulating Chiller LLTC-T2013
Low Temperature Circulating Chiller a temperature range of -25°C to 30°C for efficient cooling. Its enhanced heat transfer ensures quick temperature recovery. It has low maintenance ne...
Low Temperature Circulating Chiller LLTC-T2012
Low Temperature Circulating Chiller provides 26.5 kW cooling capacity at -5°C for optimal performance. Its heavy-duty pump ensures stable circulation in demanding systems. It offers ene...
Low Temperature Circulating Chiller LLTC-T2011
Low Temperature Circulating Chiller offers a Cooling Capacity of 18 kW at -5°C for optimal performance. It supports multi-voltage power input, compatible with 400V 50Hz and 460V 60Hz sy...
Low Temperature Circulating Chiller LLTC-T2010
Low Temperature Circulating Chiller offers a temperature range of -25°C to 30°C, ensuring optimal cooling. It enables fast temperature recovery after load changes. The system provides ...
Low Temperature Circulating Chiller LLTC-T513
Low Temperature Circulating Chiller cooling efficiency with 3.8 kW at -35°C under extreme temperature conditions. It features optimized thermal conductivity paths for improved cooling e...
Low Temperature Circulating Chiller LLTC-T512
Low Temperature Circulating Chiller a high-capacity circulation pump delivering up to 50 L/min at 2 bar pressure. The system supports dual voltage operation for flexible global installat...
Low Temperature Circulating Chiller LLTC-T511
Low Temperature Circulating Chiller steady flow with a circulation rate of up to 35L/min at 2 bar for efficient cooling. The internal components are designed for energy-efficient perform...
Low Temperature Circulating Chiller LLTC-T510
Low Temperature Circulating Chiller a wide temperature range from -40°C to 90°C for efficient regulation. Its high cooling capacity ensures reliable performance at low temperatures. Th...
Low Temperature Circulating Chiller LLTC-T413
Low Temperature Circulating Chiller a high-capacity circulation pump with 100L/min 2 bar for efficient cooling.Its robust cooling efficiency ensures stable performance in demanding appli...
Low Temperature Circulating Chiller LLTC-T412
Low Temperature Circulating Chiller a high-capacity circulation pump with 50L/min 2 bar. It features a plate heat exchanger for effective thermal transfer. Its feedback sensors monitor b...
Low Temperature Circulating Chiller LLTC-T411
Low Temperature Circulating Chiller ±0.3°C temperature control accuracy for sensitive processes. The system includes thermal and overload protection mechanisms. Its dual voltage suppor...
Low Temperature Circulating Chiller LLTC-T410
Low Temperature Circulating Chiller fast and reliable heating with its 3.5 kW heating power. It incorporates built-in high and low pressure sensors for enhanced operational safety. Its -...
Low Temperature Circulating Chiller LLTC-T315
Low Temperature Circulating Chiller a circulation pump that reaches up to 40L/min at 2 bar, ensuring efficient coolant flow. It supports long-duration experiments without temperature flu...
Low Temperature Circulating Chiller LLTC-T314
Low Temperature Circulating Chiller ultra-low temperature operations from -115°C to -80°C for demanding applications. The design allows for easy maintenance, reducing system downtime. ...
Low Temperature Circulating Chiller LLTC-T313
Low Temperature Circulating Chiller a cooling capacity of 1.1 kW at -90°C and 0.8 kW at -100°C for stable performance. Its durable construction withstands the rigors of continuous oper...
Low Temperature Circulating Chiller LLTC-T312
Low Temperature Circulating Chiller with a circulation pump rated at 30 temperature cooling. Its controller offers precise outlet thermal regulation. The system's high cooling capacity e...
Low Temperature Circulating Chiller LLTC-T311
Low Temperature Circulating Chiller with a circulation pump rated at 20 safety parameters prevent operational errors.It incorporates reinforced thermal insulation for minimal heat exchan...
Low Temperature Circulating Chiller LLTC-T310
Low Temperature Circulating Chiller within a temperature range of -100°C to -65°C, suitable for ultra-low temperature applications. Its advanced control system enhances operational saf...
Low Temperature Circulating Chiller LLTC-T2015
Low Temperature Circulating Chiller offers a temperature control of ±0.5°C for optimal cooling. The system is equipped with advanced smart diagnostics for quick error detection. Its co...
Low Temperature Circulating Chiller LLTC-T2014
Low Temperature Circulating Chiller offers a temperature range of 5°C to 30°C for optimal management. The system delivers rapid cooling performance with minimal energy consumption. Its...
Low Temperature Circulating Chiller LLTC-T2013
Low Temperature Circulating Chiller offers cooling capacity of 79kW at 20°C for optimal management. It uses eco-friendly refrigerants to minimize environmental impact. The high-flow cir...
Low Temperature Circulating Chiller LLTC-T2012
Low Temperature Circulating Chiller offers precise temperature control of ±0.5°C for optimal cooling. It features a digital touch interface for easy and efficient management. The syste...
Low Temperature Circulating Chiller LLTC-T2011
Low Temperature Circulating Chiller offers a Cooling Capacity of 40kW at 20°C for optimal performance. It operates with eco-friendly refrigerants, promoting sustainable performance. The...
Low Temperature Circulating Chiller LLTC-T2010
Low Temperature Circulating Chiller offers a temperature range of 5°C to 30°C for optimal cooling. It ensures consistent performance even under fluctuating load conditions. The device ...
Standards
EN 14511-Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors
Complies with the above standards, but is not limited to them.
Features
1. Low temperature circulating chiller for precise cooling and circulation of heat transfer fluid at sub-ambient temperatures.
2. Refrigerated circulator with pump, temperature controller, and cooling bath for external jacketed vessels and equipment.
3. Suitable for chemistry, pharmaceutical, biotech, food, material testing and industrial process cooling applications.
4. Includes chiller unit, circulating pump, temperature controller, bath tank, power cord and operation manual.
5. Supports precise temperature control from -20 to -80 C (depending on model) with circulating fluid for external cooling.
FAQ
Q1: What testing scenarios is this chiller mainly applied to?
A: The low temperature circulating chiller (refrigerated circulator) is used in chemistry, pharmaceutical, biotechnology, food, material testing, and industrial process cooling for precise cooling and circulation of a heat transfer fluid at sub-ambient temperatures, providing continuous low-temperature coolant to external jacketed reactors, condensers, distillation setups, and analytical instruments. It supports chemistry and chemical engineering (low-temperature reactions (organometallic reactions (Grignard, organolithium - often require -78 C with dry ice/acetone, but circulating chiller provides -20 to -80 C for less extreme), polymerization, crystallization (controlled cooling for crystal size/morphology), condensation (cold trap, reflux condenser at low temp), distillation (fractional distillation of volatile compounds, rotary evaporator cooling), jacketed reactor cooling (exothermic reactions - remove heat to maintain low temp; single/jacketed glass reactors)), pharmaceutical and biotech (API synthesis and crystallization (low-temp crystallization for polymorph control, purification), protein/enzyme handling (maintain low temp to preserve activity, cold filtration, chromatography (column cooling, fraction collector)), vaccine/biologic storage and processing (cold chain, cold filtration), food and beverage (cold extraction (coffee, tea, botanical extracts), brewing/wine (cold fermentation, cold stabilization, crash cooling), dairy processing, chocolate tempering (precise cooling)), material testing (low-temperature impact testing (Charpy/Izod - cool specimens to -40/-80 C), polymer testing (glass transition, low-temperature brittleness), thermal cycling, electronics testing (low-temp performance)), analytical instruments (cooling for HPLC (column oven, auto-sampler), GC (cryofocusing), mass spec, AAS (cooling water), rotary evaporators (condenser cooling)), and industrial process cooling (laser cooling, welding equipment, machine tools, semiconductor manufacturing, pharmaceutical production lines). Low temperature circulating chiller principle: A refrigeration system (compressor, condenser, evaporator) cools a heat transfer fluid (usually ethanol/water mixture, methanol, silicone oil, or thermal fluid) in an insulated bath/tank. A circulating pump moves the cold fluid through external tubing to a jacketed vessel or equipment, absorbing heat, and returning to the chiller for re-cooling. A PID temperature controller maintains set temperature (+/- 0.1-1 C). Range: typically -10 to -40 C (standard), -40 to -80 C (deep low temp, more expensive, cascade refrigeration). Cooling capacity: 200W to several kW depending on size. Unlike cryogenic (dry ice/liquid nitrogen, -78/-196 C), circulating chillers provide continuous, controlled, reusable cooling without consumable cryogens. See 3296 (jacketed glass reactor) which often uses this chiller for cooling.
Q2: What standards does the chiller comply with?
A: The low temperature circulating chiller follows relevant ISO, IEC, ASTM and GB/T standards including ISO 9001 (quality management), IEC 61010 (laboratory electrical equipment safety), IEC 60335 (refrigeration appliances, if applicable), ASTM standards for material testing (e.g., ASTM E23 for impact testing - specimen cooling), and GB/T standards for refrigerated circulators. The hardware complies with applicable temperature accuracy (+/- 0.1-1 C, stability +/- 0.1-0.5 C), cooling capacity, safety (over-temperature protection, low-fluid-level cutoff, compressor overload, pressure relief), and electrical safety (IEC 61010, proper grounding, IP rating). For pharmaceutical use, follow cGMP (21 CFR Part 211), equipment qualification (IQ/OQ/PQ), and material compatibility (food-grade/medical-grade fluid if contact with product). For food use, follow FDA food contact regulations (fluid should not contact food; use jacketed vessels). For material testing (impact), follow ASTM E23/ISO 148 (specimen cooling to specified temp, verify with calibrated thermometer). For refrigerants, follow environmental regulations (F-gas regulation EU, EPA SNAP for refrigerants; use low-GWP refrigerants (R-404A, R-508B for low temp, or natural refrigerants)). For pressure (circulating system), follow pressure vessel safety (pump pressure rating, relief valve). For regulated labs (ISO 17025, GMP), maintain calibration records (temperature calibration with certified thermometer, as-found/as-left data, cooling capacity verification). For noise, follow lab standards (chillers can be noisy 50-70 dB - place in ventilated area or use noise-reducing models).
Q3: What is the warranty period for the whole chiller and key components?
A: The whole low temperature circulating chiller is covered by a 12-24 month warranty (lab/industrial equipment often 1-2 years; some 3 years for compressor). The chiller unit, compressor, condenser, evaporator, circulating pump, temperature controller, and bath tank are covered, while heat transfer fluid (consumable - degrades over time (absorbs moisture, oxidizes; replace periodically), gaskets/seals (wear from cold/chemicals), pump seals (wear), and filters (wear) are consumables/accessories. Damage from improper use, using wrong fluid (water at sub-zero freezes and damages; use appropriate antifreeze (ethanol, methanol, silicone oil, thermal fluid); wrong fluid can freeze, expand, crack tubing), running dry (no fluid - pump/compressor damage; always have fluid before running), over-temperature (compressor failure, fan blocked), fluid contamination (water in ethanol/methanol causes ice formation, corrosion; keep fluid covered), liquid spills on electronics, extreme ambient (high ambient temp reduces cooling capacity, can overheat compressor), or unauthorized repair is excluded. Extended warranty and service contracts (preventive maintenance, refrigerant recharge, calibration) are common for chillers. Compressor lasts 5-10 years; pump 3-7 years; controller 5-10 years; heat transfer fluid needs replacement every 1-3 years (depending on type/use). Refrigerant may need recharge every 3-5 years if leak develops.
Q4: Is this device difficult to operate? Is professional training required?
A: Operation is straightforward for lab/industrial personnel (set temp, fill fluid, connect external loop). No professional training required for basic use, but refrigeration safety and fluid selection are important. We provide operation manuals, installation, and training (1-2 days). Proper setup (place on stable, level floor/bench with adequate ventilation (chiller exhausts heat - need clearance around condenser/fan; do not enclose; ambient temp typically 5-35 C), connect power (dedicated circuit, proper grounding; chillers draw high current, especially compressor startup), fill bath with appropriate heat transfer fluid (select fluid for temp range: -10 to -20 C: ethanol/water (30-50%) or propylene glycol; -20 to -40 C: ethanol (95%) or methanol; -40 to -80 C: methanol or special silicone oil/thermal fluid (e.g., Syltherm); NEVER use pure water below 0 C (freezes, expands, damages); ensure fluid level covers evaporator and pump inlet; do not overfill (fluid expands when warmed? actually contracts when cold, expands when warm - leave headspace), connect external circulation (tubing from pump outlet to jacketed vessel inlet, from vessel outlet to chiller return; use insulated tubing to minimize heat gain/frost; ensure tubing rated for low temp (some tubing becomes brittle at -40 C; use silicone, PTFE, or insulated rubber); verify no leaks), pre-operation (check fluid level, inspect tubing (no cracks, especially at low temp), verify over-temp protection set, ensure fan/condenser clean (dust reduces cooling), allow compressor warm-up? (some chillers need 5-15 min before starting cooling after power on; follow manual), operation (set temperature (e.g., -20 C, -40 C; start cooling (compressor turns on, pump circulates; allow 30-120 min to reach setpoint, especially deep low temp (-80 C may take hours), monitor fluid temp (controller display; for critical work, verify with calibrated thermometer), monitor external vessel temp (jacket temp vs internal reaction temp - there is a gradient; use internal probe for reaction temp), for exothermic reactions: ensure chiller cooling capacity exceeds reaction heat (otherwise temp rises; calculate heat load), do not exceed pump pressure (relief valve), post-operation (turn off cooling/compressor, let pump run briefly to circulate (or turn off all), if long-term storage: drain fluid (or leave fluid? some recommend leaving fluid; follow manual; for ethanol/methanol: flammable - store properly, keep covered), clean exterior, maintenance (daily: check fluid level, temperature, listen for unusual noise, check for leaks/frost on tubing (frost = heat gain/insulation issue); weekly: clean condenser/air filter (dust), inspect tubing, check pump pressure; monthly: verify temperature calibration, inspect fluid condition (cloudy = water contamination - replace), check refrigerant (if cooling poor, may need recharge); semi-annually/annually: professional maintenance (compressor check, refrigerant recharge, pump seal replacement, fluid replacement, controller calibration), troubleshooting (temperature not reaching / poor cooling (ambient temp too high (reduce, improve ventilation), fluid wrong or low (check/replace), condenser dirty (clean), cooling load too high (reduce load or larger chiller), refrigerant low (recharge - check for leaks), pump not circulating (air lock, pump failure, clogged filter - bleed air, service), compressor not running (overload, thermostat, power - check), temperature unstable / overshoot (controller PID tuning, fluid volume too small, external load fluctuating, sensor placement - adjust PID, increase fluid, stabilize load), fluid freezing / ice in system (fluid wrong (water content too high), temp below fluid rating - use appropriate antifreeze, replace fluid), pump noisy / no flow (air in system (bleed), fluid low, pump failure, clogged filter - bleed, add fluid, service), excessive frost/condensation (tubing not insulated (insulate), room humidity high (use dehumidifier or insulated lines), fluid temp very low (normal for -40/-80; insulate to prevent frost), and safety (REFRIGERATION (high-pressure refrigerant circuit - do not open, do not puncture; refrigerant can be hazardous (some are flammable (R-290, R-600a) or high-GWP); service by qualified technician; pressure relief valve), LOW TEMPERATURE BURN/FROSTBITE (fluid at -20 to -80 C causes frostbite on contact; tubing at -80 C can stick to skin; wear cryogenic gloves, face shield, lab coat; do not touch cold surfaces with bare skin; allow to warm before handling), FLAMMABLE FLUID (ethanol, methanol are flammable - keep away from open flames/sparks; use in fume hood if possible; store properly; do not use near ignition sources; methanol is toxic (absorbed through skin) - wear gloves, ventilation), ELECTRICAL (high-power compressor, proper grounding, dedicated circuit, do not spill fluid on electronics, unplug before service (lockout/tagout), do not use with wet hands), PRESSURE (circulating pump can build pressure - use pressure-rated tubing, relief valve; do not block outlet), FLUID COMPATIBILITY (use tubing/seals compatible with fluid and temp (some plastics become brittle at -40 C; silicone/PTFE rated for low temp); verify jacketed vessel rated for low temp and pressure), do not run dry (no fluid - pump/compressor damage; always verify fluid level), do not use pure water below 0 C (freezes, expands, cracks tubing/evaporator), do not exceed ambient temp rating (high ambient reduces cooling, can overheat compressor), do not block air intake/exhaust (needs ventilation for condenser), for deep low temp (-80 C): cascade refrigeration (two compressors) - more complex, slower, more expensive; allow long cooldown time, for pharma/food: use food-grade/medical-grade fluid if there is any chance of contact (though jacketed = no direct contact; still use appropriate), dispose of used heat transfer fluid properly (ethanol/methanol = flammable hazardous waste; silicone oil = chemical waste; do not pour down drain), for material impact testing: cool specimens to specified temp and verify with calibrated thermometer before testing (ASTM E23), do not move chiller while running/cold (fluid can spill, compressor damage) are critical for safe chiller operation.
Q5: What is the typical lead-time for order delivery?
A: Standard models require 7-30 working days. In-stock units can ship within 3-7 working days. Custom configurations or large built-to-order systems may require additional time, and we confirm the exact schedule before order confirmation.
Q6: Is regular calibration required? What is the recommended calibration cycle?
A: Calibration recommended every 6-12 months: temperature (with certified thermometer at multiple setpoints across range (e.g., -20, -40, -80 C); accuracy +/- 0.1-1 C, stability +/- 0.1-0.5 C), and optionally cooling capacity (verify at setpoint with known load). Routine checks: temperature verification (weekly, with reference thermometer), fluid level (daily), and condenser cleaning (weekly/monthly). If chiller is moved, fluid replaced, compressor serviced, or readings seem off, recalibrate. For GMP/pharma/material testing labs, follow applicable schedules and maintain records (calibration certificates, as-found/as-left data, thermometer ID, fluid lot, maintenance logs). For impact testing (ASTM E23), verify specimen temperature before each test batch (calibrated thermometer in bath). For critical low-temp reactions, verify actual fluid temp with independent thermometer (controller sensor may be in bath, not at vessel). Refrigerant level: check if cooling capacity drops (not a calibration, but maintenance). Pump flow/pressure: verify periodically if critical. Over-temperature protection: test annually (simulate over-temp to verify cutoff).
Q7: Are supporting consumables universal?
A: Heat transfer fluid (consumable - ethanol, methanol, propylene glycol, silicone oil, thermal fluids (Syltherm, Dynalene); universal from chemical/lab supply (Sigma-Aldrich, Fisher, Dow, Duratherm) but use correct fluid for temp range; do not mix types), gaskets/seals (specific to chiller model - use OEM or certified compatible with correct material (EPDM, Viton, silicone, PTFE) for fluid/temp), pump seals (specific to pump), tubing (insulated low-temp tubing - universal from lab supply but use correct diameter and temp rating; silicone, PTFE, insulated rubber), filters (specific to chiller), and refrigerant (specific to unit - must be serviced by qualified technician) are available from lab/industrial supply companies, though seals, pump parts, and filters are chiller-specific (use OEM or certified compatible to maintain performance and warranty). Long-term consumable cost includes heat transfer fluid (periodic replacement, $50-$500 depending on volume/type), seal/gasket replacement (periodic), and occasional refrigerant recharge (every 3-5 years, $100-$500 by technician). Energy cost is significant (compressor runs continuously at low temp, especially -80 C).
Q8: Can I customize parameters or supporting accessories?
A: Customization includes temperature range (standard -10 to -20 C (single-stage refrigeration, cheap), -20 to -40 C (single-stage, common), -40 to -80 C (cascade/two-stage refrigeration, deep low temp, expensive), -80 to -100 C (special cascade, very expensive)), cooling capacity (200W (small lab) to 1-5 kW (medium) to 10+ kW (industrial/pilot)), bath volume (2 L, 5 L, 10 L, 20 L, 30 L, 50 L - small lab to pilot), pump (pressure/flow rate (variable or fixed; 0.5-5 bar, 5-30 L/min; for external loop), type (centrifugal, gear)), control (analog (dial) or digital (PID, LED/LCD, programmable ramp/soak, timer, multi-setpoint)), features (over-temperature protection, low-fluid-level cutoff, pressure relief, auto-restart after power failure, data logging (USB, software), RS232/485/Modbus communication, alarm (audible/visual), fill/drain port, insulated bath, casters (for mobility), explosion-proof (ATEX) for flammable fluids/environments, natural refrigerant (low-GWP, R-290/R-600a - flammable, needs ATEX), accessories (heat transfer fluid (initial, appropriate type), insulated tubing (low-temp rated), extra gaskets/seals, external bath/circulation accessories, temperature probe (external, for vessel), spare pump seal, calibration certificate (ISO 17025), validation package (IQ/OQ/PQ for pharma), certifications (CE, ISO 9001, IEC 61010, ATEX, UL), language and accessories. Additional fluid, tubing, and accessories can be ordered separately.
Q9: Does the purchase include on-site installation and commissioning service?
A: Standard delivery includes low temperature circulating chiller (unit, pump, controller, bath), power cord, and instruction manual (heat transfer fluid often NOT included - order separately). On-site installation, setup, and operator training ARE typically included or strongly recommended for chillers (requires professional setup (power, ventilation, fluid filling, external loop connection, leak testing), initial cooldown, and user training on fluid selection, low-temp safety, maintenance, and troubleshooting; installation by manufacturer or certified technician is standard, especially for >-40 C or large units). For small lab chillers (-20 C): self-installation is feasible (unbox, fill fluid, plug in, use) but initial training on fluid selection and safety is recommended. Always fill with appropriate fluid BEFORE turning on pump/compressor (dry operation damages pump), and allow cooldown time before use. For ATEX units: professional installation required.
Q10: What types of samples/equipment are compatible with this equipment?
A: The low temperature circulating chiller cools various external equipment and processes including jacketed glass reactors (single/double layer, for low-temp reactions, crystallization), rotary evaporators (condenser cooling, cold trap), distillation setups (condensers, cold traps), analytical instruments (HPLC column, GC, AAS, mass spec), material testing specimens (impact test specimens, polymer samples), food/beverage processing (cold extraction, fermentation, crash cooling), and industrial equipment (lasers, machine tools, semiconductor). NOT compatible with: Equipment requiring below -80 C (exceeds chiller range - use liquid nitrogen (-196 C) or cryocooler; dry ice/acetone for -78 C), equipment requiring heating (this is cooling only; for heating+cooling use heating/cooling circulator (thermostat)), high-temperature applications (chiller cools only; fluid may be heated by external load but chiller removes heat), very high cooling loads beyond capacity (chiller cannot maintain temp - calculate heat load, select larger unit), fluids incompatible with wetted parts (verify pump/seals/tubing compatible with ethanol/methanol/silicone oil; some materials swell/degrade), and open vessels with flammable fluid (ethanol/methanol vapors - use closed system, fume hood, ATEX if needed). For jacketed reactors: ensure reactor rated for low temp (borosilicate glass OK, but thermal shock - do not add hot material to cold jacket; cool gradually), pressure rating (circulating pump pressure). For rotary evaporators: connect chiller to condenser inlet/outlet; ensure flow direction. For impact testing: cool specimens in bath or chamber, verify temp before testing. For food: fluid is in external jacket (no contact with food), but use food-grade facility and proper cleaning. IMPORTANT: Low temperature circulating chiller fundamentals: (1) What is it? A refrigerated circulator that cools a heat transfer fluid and pumps it to external equipment (jacketed reactors, condensers) for precise sub-ambient temperature control. Reusable alternative to dry ice/liquid nitrogen. (2) How it works: - Compressor compresses refrigerant (high pressure, hot). - Condenser cools refrigerant (rejects heat to room air). - Expansion valve drops pressure (refrigerant gets cold). - Evaporator (in bath) absorbs heat from fluid (cools fluid). - Pump circulates cold fluid to external load, returns warm fluid to bath. - PID controller maintains set temp. (3) Temperature ranges: - -10 to -20 C: Single-stage, common, cheap. Ethanol/glycol. - -20 to -40 C: Single-stage or cascade. Ethanol/methanol. - -40 to -80 C: Cascade (two compressors), expensive, slow. Methanol/silicone. - Below -80 C: Liquid nitrogen or cryocooler (not this chiller). (4) Heat transfer fluids: - Ethanol/water (30-50%): to -20 C. Cheap, flammable. - Propylene glycol/water: to -10/-20 C. Non-toxic, food-grade. - Ethanol (95%): to -40 C. Flammable, toxic. - Methanol: to -80 C. Flammable, toxic (skin absorption). - Silicone oil: to -60/-80 C. Low toxicity, expensive, high viscosity at low temp. - Thermal fluids (Syltherm, Dynalene): engineered for low temp. - NEVER pure water below 0 C (freezes). (5) Key parameters: - Cooling capacity (W/kW) at setpoint (decreases at lower temp). - Pump flow/pressure. - Bath volume. - Temp stability (+/- 0.1-0.5 C). - Ambient temp range. (6) Safety: - Frostbite (fluid at -40/-80 C) - cryogenic gloves. - Flammable fluid (ethanol/methanol) - no ignition, fume hood. - High-pressure refrigerant - qualified service. - Electrical (high power). - Do not run dry. - Use correct fluid (no water below 0). (7) Common errors: - Wrong fluid (water freezes, damages). - Running dry (pump damage). - Blocked condenser (poor cooling). - Not insulating tubing (frost, heat gain). - Exceeding cooling capacity (temp not reaching). - Ambient too high (compressor overheats). - Fluid contamination (water in methanol = ice). - Not allowing cooldown time (-80 C takes hours). (8) Choosing the right chiller: - Temp needed: -20 C (standard), -40 C (common low), -80 C (cascade, expensive). - Cooling load: Calculate heat from reaction/equipment. Select chiller with >20% margin. - External equipment: Jacketed reactor, rotovap, HPLC, impact tester. - Fluid: Match to temp range and compatibility. - Budget: -20 C (affordable) vs -80 C (expensive). - GMP/pharma: IQ/OQ, calibration, data logging.
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