High-Low Temperature
Integrated Unit
Auto-cascade refrigeration technology delivering extreme temperature ranges from +300 °C down to −80 °C within a single integrated system -- built for pharmaceutical, aerospace, and advanced chemical applications.
Engineered to eliminate batch temperature inconsistency, our cascade units combine a high-stage and low-stage refrigeration circuit with precision PLC control, achieving ±0.1 °C stability across the full range. Fully compliant with CE / AHRI / ATEX standards.
Engineered for Extreme Temperature Ranges
The cascade refrigeration architecture pairs a high-temperature circuit with a low-temperature circuit, enabling wide-range temperature control with precision stability. All parameters listed below are standard baseline values; full OEM/ODM customization is available.
Operating Temperature Range
| Parameter | Value / Range |
|---|---|
| Refrigeration Type | Auto-Cascade (High-Low Stage) |
| Temperature Range | −80 °C ~ +300 °C |
| Temperature Stability | ±1 °C |
| Cooling Capacity | 6 kW ~ 200 kW (Customizable) |
| Refrigerant | R134a / R404A / R507 / R1234yf (ECO) |
| Power Supply | 380V / 3Ph / 50Hz (Custom available) |
| Compressor Type | Reciprocating Cascade |
| Heat Exchanger | Shell & Tube (SS304 / SS316L opt.) |
| Control System | PLC + HMI Touchscreen |
| Pump Type | Magnetic Drive (leak-free) |
| Noise Level | ≤55 dB(A) |
| COP | ≥ 4.8 |
| Protection Rating | IP54 standard / IP65 optional |
| Explosion-proof Option | Ex d IIB T4/C4 Gb (ATEX) |
| Certifications | CE · UL · ATEX · ISO 9001 |
| Communication | Modbus / RS485 / 4-20 mA / Ethernet |
| Lead Time (OEM) | 15-45 working days |
* All specifications are baseline values. Full parameter customization available under OEM/ODM agreement. Contact our engineering team for load-matching analysis and compliance documentation.
5 Core Components That Define Performance
Every unit is assembled from carefully selected, industrial-grade components -- each engineered to withstand continuous duty cycles in the most demanding environments.
Reciprocating Cascade Compressor
The heart of the cascade system. The dual-stage reciprocating compressor pairs a high-stage circuit (typically R134a) with a low-stage circuit (R404A or R507) connected through an intermediate cascade heat exchanger. This architecture makes it possible to achieve −80 °C outlet temperatures that single-stage systems cannot reach.
- ▪ Cascade architecture: Independent high/low-stage loops with optimized intermediate temperature
- ▪ Hermetic sealed design: Eliminates refrigerant leakage; maintenance-free shaft seal
- ▪ Thermal protection: Built-in overload, phase-loss, and high-pressure cutout protection
- ▪ Variable capacity: Optional frequency-drive control for energy-saving partial-load operation
Shell & Tube Condenser
The shell & tube condenser efficiently removes heat from the high-stage refrigerant circuit by transferring energy to the cooling water flow. Its robust tube-bundle construction provides outstanding thermal efficiency and withstands continuous high-pressure duty cycles -- essential for stable cascade operation.
- ▪ Material options: Carbon steel shell with copper tubes (standard) or full SS316L for corrosive media
- ▪ High working pressure: Rated ≥25 bar; supports both water-cooled and evaporative cooling configurations
- ▪ Easy maintenance: Removable tube bundle; accessible end caps for in-place cleaning (CIP compatible)
- ▪ GMP option: Sanitary-grade 316L construction with Ra ≤0.4 μm electropolished inner surfaces
Shell & Tube Evaporator
Located in the low-stage circuit, the shell & tube evaporator is where process fluid (cooling water, brine, or heat-transfer oil) is chilled to target temperatures as low as −80 °C. Its flooded or direct-expansion design optimises refrigerant distribution across all tube rows for maximum heat transfer uniformity.
- ▪ Flooded / DX design: Uniform refrigerant distribution eliminates hot-spots and ensures ±0.1 °C stability
- ▪ Anti-freeze protection: Minimum flow switch interlock and programmable low-temperature cutout
- ▪ Thermal insulation: 50 mm polyurethane insulation shell prevents condensation and heat gain
- ▪ Media compatibility: Ethylene glycol, propylene glycol, methanol brine, silicone oil support
Magnetic Drive Pump
The magnetically coupled, seal-less pump eliminates mechanical shaft seals -- the number-one cause of pump leakage failures in chemical and pharmaceutical environments. Torque is transmitted through a permanent-magnet coupling across a containment shell, guaranteeing zero-leak fluid circulation for the full service life of the unit.
- ▪ Zero-leak design: No mechanical seal; permanent magnetic coupling eliminates shaft penetration
- ▪ Corrosion resistance: Wetted parts in PTFE-lined carbon steel or full SS316L for aggressive media
- ▪ Dry-run protection: Integrated temperature sensor triggers shutdown before bearing damage occurs
- ▪ Low noise & maintenance: No seal replacement; quiet operation ≤48 dB ideal for cleanroom use
PLC Control Box
The PLC-based intelligent control cabinet integrates all monitoring, protection, and communication logic for the cascade unit. A colour HMI touchscreen gives operators full visibility of both refrigerant circuits in real time, with configurable alarm thresholds, data logging, and optional remote access via Modbus TCP / Ethernet.
- ▪ Dual-circuit monitoring: Real-time display of high/low-stage pressures, temperatures, and compressor status
- ▪ Multi-layer protection: High/low pressure cutout, motor overload, phase-loss, freeze protection interlocks
- ▪ Data logging: Onboard alarm history and trend recording; exportable CSV for GMP audit trails
- ▪ Remote integration: Modbus RTU/TCP, 4-20 mA analog, and optional SCADA/BMS connectivity
Built to Perform. Certified to Comply.
ISO 9001 Controlled
Strict quality management from raw material sourcing to final testing -- zero-defect batch production guaranteed.
24/7 Stable Operation
Continuous duty cycle design for pharmaceutical and chemical production lines. Minimised downtime architecture.
One-Stop Compliance
CE, GMP, UL, ATEX, MSDS, calibration certificates, and origin documents -- full regulatory package included.
Fast Lead Times
Rapid prototyping in 7-15 working days for R&D batches. Mass production scheduling within 45 working days.
From Inquiry to Delivery -- Step by Step
Our structured 6-phase process ensures every OEM/ODM project is delivered on specification, on time, and with full compliance documentation. A dedicated project engineer guides you through every milestone.
Inquiry & Consultation
Submit your requirements. Our engineers conduct load-matching analysis and send a tailored technical proposal within 24 hours.
Engineering Design
Full P&ID drawings, 3D mechanical layout, electrical schematic, and compliance design review. Customer approval required before production.
Order Confirmation
Review and sign the technical specification sheet, commercial contract, and compliance agreement. Deposit payment confirms production scheduling.
Manufacturing
Precision fabrication under ISO 9001 QC protocols. Material traceability records, weld inspection reports, and intermediate quality checkpoints.
Commissioning & Acceptance
Full factory acceptance test (FAT) -- cascade pull-down, stability hold, alarm simulation, and calibration. Third-party witness inspection available on request.
Packing & Shipment
Export crating, moisture protection, and shock-absorbing packaging. Full shipping documents, CE Declaration of Conformity, and calibration certificates included.
Post-delivery support included
On-site installation guidance, remote commissioning, operator training, and global technical support with ≤4-hour response time are included in all OEM/ODM agreements. Spare parts kits available with every order.
Ready to Specify Your
Cascade Unit?
Send us your process requirements -- temperature range, cooling load, media type, certifications needed -- and our engineering team will respond with a tailored proposal within 24 hours. No obligation.
Direct Factory Contact
Zhangjiagang, Jiangsu Prov.,
P.R. China