Industrial Chiller
1. Bipolar compression
Adopting bipolar compression enhances the energy efficiency of the unit and broadens the capacity adjustment range of the unit
2. National patent
High-efficiency falling film evaporation technology
3. Invention patent
Flash evaporation tank technology
4. Self-developed
Remote intelligent control
5. Anti-surge technology
The combination of prevention, control and alarm makes the unit safer and more reliable
Industrial Chiller
Product Introduction
Industrial Chiller is the use of electricity as a power source, freon refrigerant in the evaporator refrigerant evaporation, freon evaporation wet steam compressor compressed into high temperature and high pressure gas, the water cooling condenser is condensed into a liquid, the expansion valve throttling recirculation into the evaporator. Thus, the freezing water at 7 C -12 C is made for air conditioning at the end of air conditioning.
Features
High-Efficiency Two-Stage Centrifugal Compressor
Motor: 3-phase bipolar squirrel cage induction motor (Y-△ start, direct/soft start).
Compression: High-efficiency two-stage + economizer design. Protection: IP54.
Impeller: High-strength aluminum enclosed type (higher efficiency than open).
Flexible Voltage Options (380V/6kV/10kV)
High voltage reduces initial investment (no transformer, lower cable/electrical costs, smaller machine room).
SIEMENS Intelligent Control
User-friendly: Chinese interface, real-time monitoring, clear data display.
Capacity Adjustment: 10–100% stepless.
Protections: Power, high/low voltage, oil temp, etc.
Anti-Surge: Advanced multi-level (prevention + control + alarm).
Visualization: Displays switch/analog states, inputs, alarms, faults.
Throttling Control Options
3 Programs: Orifice plate (OP), OP + solenoid valve (SV), OP + electric control valve (ECV).
ECV: Most precise (optional, higher cost).
OP: Customized per unit, no movable parts (high reliability).
Intelligent Liquid Level Control
Uses static capacitance or floating ball level meters for precise condenser control.
Dedicated Oil Return System
Built-in oil pump + separate cooling.
Injection pump (high-pressure gas-driven) for reliable low-side oil return.
Eco-Friendly Refrigerant (R134a)
HFC, globally recognized.
Compact & Quiet
Small footprint, low noise.
Advantages of GRAD Industrial Chiller
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.
Technical parameters table of centrifugal water cooled cold water chiller(Part I)
Model | LC350A | LC400A | LC450A | LC500A | LC550A | LC600A | LC650A | LC700A | LC750A | LC800A | LC850A | LC900A | ||
Cooling capacity | RT | 350 | 400 | 450 | 500 | 550 | 600 | 650 | 700 | 750 | 800 | 850 | 900 | |
KW | 1231 | 1407 | 1583 | 1759 | 1934 | 2286 | 2462 | 2638 | 2814 | 3165 | 3341 | 3165 | ||
104Kca/h | 106 | 121 | 136 | 151 | 166 | 197 | 212 | 227 | 242 | 257 | 272 | 272 | ||
Electric motor | Power (kw) | 208 | 242 | 277 | 306 | 334 | 340 | 369 | 400 | 425 | 452 | 483 | 513 | |
Power supply | 380-3ph-50hz | 6000/10000V-3ph-50hz | ||||||||||||
Cooling mode | Refrigerant spray cooling | |||||||||||||
Performance factor COP (KW/KW) | 5.92 | 5.81 | 5.72 | 5.75 | 5.8 | 6.2 | 6.19 | 6.16 | 6.21 | 6.22 | 6.19 | 6.17 | ||
refrigerant | R134a | |||||||||||||
Evaporator | Cold water flow (m3/h) | 212 | 242 | 272 | 302 | 333 | 363 | 393 | 423 | 454 | 484 | 514 | 544 | |
Cold water press drop ( kpa) | 65 | 84 | 82 | 86 | 87 | 84 | 81 | 81 | 87 | 88 | 87 | 87 | ||
Number of pass cold water inlet and outlet | 2 | |||||||||||||
Temperature ( ℃) | 12/7 | |||||||||||||
Connection diameter (DN) | 200 | 250 | 300 | |||||||||||
Condenser | Cooling water flow (m3/h) | 265 | 302 | 340 | 378 | 416 | 454 | 491 | 529 | 567 | 605 | 643 | 681 | |
Cooling water press drop ( kpa) | 70 | 85 | 87 | 84 | 89 | 87 | 80 | 77 | 84 | 88 | 85 | 84 | ||
Number of pass cooling water inlet and outlet | 2 | |||||||||||||
Temperature ( ℃) | 30/35 | |||||||||||||
Connection diameter (DN) | 200 | 250 | 300 | |||||||||||
About us
Manufacturer:Shandong GRAD Group Co.,Ltd.
Established Time:1993
Covers an area of:700,000sqm
Main products:Central air conditioners,ventilators ,GRP Composite material products,Environment protection products
Employment : 2500+ employees
Registered capital: ￥ 100 million
Equipment price : ￥370 million
Total capital :￥ 925 million
Annual output value: ￥over 3 billion
Design team:300+
Overseas offices:
1. Thailand and Cambodia offices
2. USA branch company
GRAD sales network covers over 100 countries and regions like America, Australia Indonesia, Malaysia, UAE, Thailand, Nigeria etc and has established branch company in USA, and set up offices in Cambodia and Thailand to make overall layout of global market.
FAQ
Q1. Where is your loading port?
A: Qingdao/Shanghai/Tianjin, China or else port as for your request.
Q2. What's your company's main products?
A: Our company is specialized in central air-conditioning,ventilation and GRP Composite material products.
Q3. What’s your payment term.
A:T/T,30% deposit,70% before delivery or 100% Irrevocable L/C at sight.
Q4. What’s your Warranty.
A:Warranty for 12 months from the date of shipment from the factory.
