Portable Water Chillers Industrial
Test ability, technical level
1.GRAD has the National Laboratory of Air Conditioning Products recognized by CNAS, which is used for the design, development and experimental research of water-cooled chiller and the factory test of products.
2.Strict factory product quality control, so that users can buy at ease, with satisfaction.
3.GRAD screw type water cooled chiller series products ware tested by the national air conditioning quality testing center, the technical performance indicators are higher than GB/T184330.1-2007"Vapor compression cycle cold water (heat pump) unit Part 1: Industrial or commercial and similar uses of cold water (heat pump) units "standard, product quality is stable, reliable operation, has been praised by the majority of users at home and abroad.
Portable Water Chillers Industrial
Features of GRAD Screw Cooled Water Unit
1. Semi-Hermetic Screw Compressor
Simple structure, high reliability, long lifespan (1/3 the parts of piston compressors).
Smooth and continuous suction/discharge, strong resistance to liquid slugging.
High COP: ≥4.6 (dry type), ≥5.3 (flooded/falling film).
25%-100% stepless capacity control for energy savings.
![Portable Water Chillers Industrial]( "Portable Water Chillers Industrial")
2. High-Efficiency Evaporators
Dry-Type Shell & Tube Evaporator:
DAE high-efficiency heat exchange tubes for superior heat transfer.
Optimized refrigerant distribution and anti-leakage design.
Falling Film Evaporator (Patented):
15% higher efficiency than flooded evaporators, 30% lower operating costs.
Reduced refrigerant charge, stable oil return, higher COP.
3. Shell & Tube Water-Cooled Condenser
DAE high-efficiency condensation tubes for enhanced heat transfer.
Anti-corrosion & anti-fouling design for long-term performance.
Equipped with safety valves for easy maintenance.
4. Low Noise & Vibration Design
85% vibration absorption efficiency (transmission rate <0.15).
Anti-vibration pipe clamps for noise reduction.
![Portable Water Chillers Industrial]( "Portable Water Chillers Industrial")
5. Premium Refrigeration Components
World-class brands for filters, expansion valves, sensors, etc.
100% factory inspection for reliability.
6. Intelligent Control System
Multi-unit synchronization, RS485/RS232 remote monitoring.
Patented "Real-Time Refrigerant Flow Control" for precise operation.
Auto-balancing compressor control for optimal efficiency.
7. Energy-Saving & Eco-Friendly Features
Falling film technology meets China’s Grade 1 energy efficiency.
Patented oil separator (99.99% efficiency) for reliable oil return.
Reduced refrigerant charge for lower environmental impact.
8. Easy Installation & Maintenance
Fully assembled before shipment, just connect water pipes.
Smart remote monitoring: fault alerts, data logging, and diagnostics.
![Portable Water Chillers Industrial]( "Portable Water Chillers Industrial")
Advantages of Falling Film Screw Cooled Water Unit
1.The heat exchange efficiency is increased by 10%, the refrigerant charge is reduced by 27%, and the volume of the unit can be effectively reduced by more than 20%
2. Remote intelligent services
3. Applicable to multiple scenarios and working conditions
4. Low operation and maintenance costs
5. The falling film evaporation technology has been granted a national patent
About us
Shandong GRAD Group Co., Ltd. is a leading global manufacturer specializing in HVAC (Heating, Ventilation, and Air Conditioning) solutions. With over 30 years of production experienceand 16+ years in international business, we have built a strong reputation for innovation, reliability, and excellence. Our products are exported to 100+ countries, demonstrating our commitment to quality and customer satisfaction worldwide. Operating from a 500,000 sqm state-of-the-art production facility, we employ 2,000+ skilled professionals dedicated to delivering cutting-edge HVAC technologies. GRAD Group holds 1,000+ patents, underscoring our leadership in R&D and technological advancement. Whether for commercial, or industrial applications, we provide energy-efficient, sustainable, and high-performance HVAC solutions tailored to global market needs. Why Choose GRAD?
✔ 30+ Years of HVAC Expertise
✔ Strong International Presence (100+ Countries)
✔ Advanced Manufacturing with 500,000 sqm Facility
✔ 1,000+ Patents for Innovative Solutions
✔ Commitment to Quality & Sustainability At GRAD, we strive to create comfortable, efficient, and environmentally friendly climate control systems for a better future. For more information, visit our official website or contact us directly.
Our services
Before-sale services:
(1) Tell customers how to use our products and matters needing attention.
(2) Guide customers to choose the best and economic product, recover the investment within short time.
(3) Site inspection if you need.
In-Sale services:
(1)Quality control must be inspected strictly.
(2)In accordance with the agreements stipulated in the contract.
After-sale services:
(1) If the project needs our installation guidance, we can send our engineer and translator. We can also send customers installation video to teach them how to fix and operate with our product.
(2) Usually, our product warranty is 18 months after leaving factory or 12 months after installation. within this months, all parts broken will be responsible for our factory.
(3) Regular contact with customer, consult with the customer feedback, come true with the customer's two-way communication.
