Chilled Water Cooling Units
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
Chilled Water Cooling Units
The GRAD ultra-high Efficiency falling film centrifugal unit is suitable for commercial real estate, residential real estate, industrial real estate and government public building customers. Through five core technologies including two-stage compression gas injection and enthalpy increase, high-efficiency falling film evaporation, flash tank, anti-pulsation and Internet of Things, it achieves a unique function of 15% improvement in unit energy efficiency and worry-free and cost-effective operation and maintenance. Solve the core problems of low energy efficiency of customer units, high operation and maintenance costs, and difficulties in fault diagnosis and maintenance.
Adopting the advanced domestic "two-stage compression" and "gas injection and enthalpy increase" technologies, compared with the single-stage compression centrifugal chiller, the COP can reach 6.34-6.65, and the energy efficiency can be improved by 5%-8%.
Unit Features
1.Ultra-High Efficiency
Two-stage centrifugal compressor with economizer design (COP up to 6.65).
High-strength enclosed aluminum impeller (more efficient than open-type designs).
2.Flexible Power Options
Voltage choices: 380V/6000V/10000V – reduces transformer/cable costs and saves on electrical installation.
3.Smart SIEMENS Control System
User-friendly Chinese interface with real-time monitoring.
10–100% stepless capacity adjustment + advanced anti-surge protection.
Full safety protections (power, pressure, oil temperature, etc.).
4.Precision Throttling Options
Customized orifice plates (no moving parts = maximum reliability).
Optional orifice + electric valve for ultra-precise control (higher cost).
5.Reliable Oil & Refrigerant Systems
Built-in oil pump with separate cooling for stable lubrication.
Uses eco-friendly R134a refrigerant (internationally certified).
6.Compact & Quiet
Space-saving design with low noise operation.
![Chilled Water Cooling Units]( "Chilled Water Cooling Units")
We offer professional water-cooled central air conditioning customized system services. We can conduct preliminary system design based on the specific needs of each project, ensuring the integrity and efficiency of the entire water-cooling system.
About us
Establised in 1993, GRAD Group covers an area of 1.15 million square meters and has more than 2,000 employees, with an annual output value of nearly 4 billion yuan. GRAD Group's main business: central air conditioning chiller and terminal products, FRP water tank, FRP winding pipe, FRP storage tank, wind turbine cabin cover, environmental protection equipment, and other more than 130 varieties. GRAD Group is the pillar enterprise of the “Dezhou Central Air-Conditioning City” named by the China Refrigeration and Air-Conditioning Industry Association. It ranks the top 10 among central air-conditioning enterprises in the country, The top 3 composite material enterprises，and gets the first-class qualification for the installation of national electromechanical equipment and the second-class qualification for air purification engineering. GRAD Group can undertake central air conditioning engineering, purification engineering construction.
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.
FAQ
Q1. What are your shipping ports?
A: We ship from Qingdao, Shanghai, or Tianjin (China). Other ports can be arranged upon request.
Q2. What products does your company specialize in?
A: We are a leading manufacturer of central air-conditioning systems, ventilation solutions, and GRP composite materials.
Q3. What is your minimum order quantity (MOQ)?
A: 1 unit (or customized based on project requirements).
Q4. What payment terms do you accept?
A: T/T (Telegraphic Transfer) and L/C (Letter of Credit).
Q5. Where is your factory located?
A: Our facility is in Dezhou, Shandong Province, with excellent logistics:
1-hour bullet train to Beijing
4-hour bullet train to Shanghai
Nearest airport: Jinan Yaoqiang International Airport
