SML Series Water-Cooled Chiller — Semi-Hermetic Screw Industrial Cooling System

Product Overview

The SML Series Water-Cooled Chiller is a high-capacity industrial cooling system engineered by Chenxing Machinery for demanding process cooling applications across manufacturing, HVAC, and infrastructure sectors. Built around imported semi-hermetic screw compressors with a multi-compressor parallel configuration, this industrial chiller delivers nominal refrigerating capacities ranging from 159,000 to 814,000 kcal/h across seven models (SML-150S through SML-800S). The unit features horizontal shell-and-tube condenser and evaporator heat exchangers, R22 refrigerant, and microcomputer PID intelligent control — all housed within a heavy-gauge steel frame designed for 24/7 continuous duty in industrial environments.

As a water-cooled system, the SML series requires integration with an external cooling tower and water pump circuit, making it the preferred choice for facilities where cooling water is readily available and maximum energy efficiency is required. Compared to air-cooled chiller alternatives of equivalent capacity, water-cooled chillers offer higher COP values, lower condensing temperatures, and reduced compressor workload — translating directly into lower operating costs over the equipment lifecycle.

This cooling system serves as the central refrigeration source in large-scale applications: industrial process temperature control (injection molding, chemical reactors, food processing lines), central air conditioning for commercial buildings and hospitals, data center cooling, and pharmaceutical manufacturing where precise chilled water temperature stability is non-negotiable. For plastic recycling solutions and extrusion line operations, the SML chiller integrates seamlessly with downstream equipment including plastic pelletizer machines, high-speed mixer units, and plastic crusher systems to maintain optimal processing temperatures.

Technical Specifications

SML Series Full Model Range — Performance Parameters

Compressor Specifications

Condenser Specifications

Evaporator Specifications

Refrigerant & Physical Dimensions

> Note: Cooling capacity conversion — 1 kcal/h ≈ 1.163 W. All specifications are for reference; contact Chenxing Machinery for exact project-specific configurations. Alternative refrigerants (R134a, R407C) may be available upon request.

Key Features

1. Imported Semi-Hermetic Screw Compressor

The heart of every SML water-cooled chiller is an imported semi-hermetic screw compressor renowned for exceptional reliability under continuous industrial load. Unlike open-drive designs that risk refrigerant leakage through shaft seals, the semi-hermetic configuration integrates the motor and compression element within a single sealed housing — eliminating external seal failure modes while allowing field service access when needed. The screw rotor profile delivers smooth, pulse-free compression with minimal vibration compared to reciprocating alternatives, resulting in lower noise, reduced foundation requirements, and extended bearing life. This compressor technology is particularly advantageous in applications where the chiller runs 8,760 hours per year, such as data center cooling and continuous chemical process cooling.

2. Multi-Compressor Parallel Design for Energy Efficiency

Models SML-300S through SML-800S employ a dual-compressor parallel configuration that fundamentally transforms part-load efficiency. Instead of a single large compressor cycling on and off, the dual-compressor arrangement allows sequential staging: one compressor handles base load while the second activates only when demand exceeds the single-unit threshold. This staged starting dramatically reduces inrush current — a critical consideration for facilities with limited electrical infrastructure or generator backup systems. When paired with the microcomputer PID controller, the system continuously evaluates the gap between leaving chilled water temperature and setpoint, activating or deactivating the second compressor only when the load delta justifies it. The result is a cooling system that maintains tight temperature control without the energy waste of short-cycling, particularly relevant in pipe extrusion and pelletizing machine lines where heat load varies with production rate.

3. Microcomputer PID Intelligent Control

The SML series features an advanced microcomputer PID control system that continuously monitors chilled water supply and return temperatures, compressor discharge and suction pressures, condenser water temperature, and multiple safety parameters. The PID algorithm — Proportional, Integral, Derivative — modulates compressor staging and capacity to maintain the leaving chilled water temperature within ±0.5°C of setpoint, even under rapidly changing thermal loads. The human-machine interface (HMI) provides an intuitive operational dashboard displaying real-time parameters, historical trend data, alarm logs, and maintenance schedules. Operators can configure temperature setpoints, differential bands, compressor rotation sequences, and time-of-day scheduling directly from the panel. For facilities integrating chillers with upstream equipment such as high-speed mixer units or PVC hot-cutting pelletizing lines, the controller supports Modbus RTU communication for centralized building management system (BMS) integration.

4. Seven-Layer Safety Protection System

Industrial chillers operate in environments where a single fault can cascade into costly downtime or equipment damage. The SML series incorporates a comprehensive seven-layer safety protection architecture:

• High/Low Pressure Switches: Mechanical pressure switches on both the high-pressure (discharge) and low-pressure (suction) sides of the refrigeration circuit. If condensing pressure exceeds safe limits due to cooling tower failure, or suction pressure drops below the threshold indicating refrigerant loss, the affected compressor circuit is immediately locked out with a latched alarm requiring manual reset after root-cause investigation.

• Water Flow Interruption Protection: Flow switches on both the condenser water and chilled water circuits detect loss of flow. Inadequate condenser water flow can cause dangerously high discharge pressures; loss of chilled water flow risks evaporator freeze-up. Either condition triggers an immediate compressor shutdown.

• Freeze Protection: An anti-freeze thermostat on the evaporator monitors leaving chilled water temperature. If the temperature approaches the freezing point — a risk during low-load operation or chilled water pump failure — the controller shuts down the compressor and may activate an optional evaporator heater to prevent tube rupture.

• Fusible Plug: A thermal fusible plug on the condenser acts as a last-resort pressure relief. If condensing temperature rises beyond the plug's melting point despite other safeties, the plug releases refrigerant in a controlled manner, preventing catastrophic vessel rupture.

• Safety Relief Valve: Spring-loaded pressure relief valves on both the condenser and evaporator vessels provide ASME-compliant overpressure protection, venting refrigerant if internal pressure exceeds the vessel design rating.

• Motor Reverse-Phase Protection: A phase-sequence relay prevents compressor operation if the incoming three-phase power supply has incorrect phase rotation. Reverse rotation can destroy a screw compressor within seconds by starving bearings of oil.

• Compressor Overheat Protection: Embedded thermal sensors in the compressor motor windings monitor temperature continuously. If winding temperature exceeds the insulation class limit — due to high compression ratio operation, insufficient suction gas cooling, or refrigerant undercharge — the controller initiates a protective shutdown.

5. Horizontal Shell-and-Tube Heat Exchangers

Both the condenser and evaporator utilize the horizontal shell-and-tube configuration — the workhorse design for industrial-scale heat transfer. In this architecture, water flows through the tube bundle while refrigerant circulates around the tubes within the shell. Key design features include:

• High-Efficiency Heat Transfer Tubes: Internally and externally enhanced tube surfaces increase the effective heat transfer coefficient, reducing the required surface area and overall unit footprint compared to plain-tube designs.

• Removable Tube Bundle: The shell-and-tube construction allows the tube bundle to be extracted for mechanical cleaning, inspection, or replacement — a critical maintainability advantage over brazed-plate or coaxial heat exchangers that must be replaced entirely when fouled.

• 1.0 MPa Water-Side Pressure Rating: Suitable for typical closed-loop chilled water and open-loop condenser water systems without requiring special high-pressure components.

• Low Water-Side Pressure Drop (<100 KPa): Minimizes pumping energy, which can represent 15-25% of total chiller plant energy consumption in poorly designed systems.

• Dual Water Connections: Models SML-300S and above feature dual condenser water inlets/outlets (designated "2-DNxx") for balanced water distribution across the shell, reducing localized fouling and improving overall heat transfer uniformity.

For WPC foam board extrusion line operations where process cooling water quality may vary, the shell-and-tube design offers superior fouling tolerance compared to compact plate heat exchangers.

6. Differential Oil Supply Lubrication

The screw compressor's reliability hinges on consistent lubrication. The SML series employs a differential pressure oil supply system: oil is driven from the oil separator to compressor bearings, rotors, and capacity control mechanisms by the pressure difference between compressor discharge and suction — no external oil pump required during normal operation. This passive lubrication approach eliminates a common failure point (oil pump motor/controls) and ensures that oil flow increases naturally with compressor load. The system includes an oil heater to prevent refrigerant migration into the oil sump during compressor off-cycles, which can cause oil dilution and bearing damage on startup.

7. Modular Frame Design for Transportation and Installation

Each SML chiller is built on a rigid structural steel base frame with integrated forklift pockets and lifting eyes. All major components — compressors, heat exchangers, control panel, and interconnecting piping — are factory-assembled, pressure-tested, evacuated, charged, and performance-tested before shipment. This plug-and-play approach reduces on-site installation to four connections: condenser water inlet/outlet, chilled water inlet/outlet, and main electrical supply. For projects involving complete production lines — including crushing and grinding machine systems, disc grinding pulverizer units, and vibrating screen classifiers — Chenxing Machinery can coordinate delivery and commissioning of the entire equipment package.

8. Industrial-Grade Electrical and Control Components

The electrical enclosure houses internationally recognized components: Schneider or Siemens circuit breakers and contactors, phase-sequence and phase-loss monitoring relays, and industrial-grade terminal blocks rated for the vibration and temperature conditions typical of mechanical equipment rooms. The control transformer provides galvanic isolation between the main power supply and the sensitive control circuitry, protecting the PID controller from voltage transients. For facilities operating plastic grinding machine equipment with high harmonic content on the electrical supply, optional line reactors can be specified to protect compressor motors.

How It Works — Vapor Compression Refrigeration Cycle

The SML water-cooled chiller operates on the fundamental vapor compression refrigeration cycle, a thermodynamic process that transfers heat from a low-temperature source (chilled water returning from the process load) to a high-temperature sink (condenser water circulating to the cooling tower). The cycle involves four sequential processes:

Step 1 — Compression (Compressor): Low-pressure, low-temperature refrigerant vapor (R22) enters the semi-hermetic screw compressor from the evaporator suction line. The compressor's intermeshing screw rotors progressively reduce the trapped vapor volume, raising both pressure and temperature. The resulting high-pressure, high-temperature superheated vapor discharges into the oil separator, where entrained lubricating oil is separated and returned to the compressor sump. The compression work input — 45 to 228 kW depending on model — is the primary energy consumer of the system.

Step 2 — Condensation (Condenser): The high-pressure refrigerant vapor enters the shell side of the horizontal shell-and-tube condenser. Condenser water — circulated from the cooling tower by dedicated condenser water pumps — flows through the tube bundle at flow rates from 38 to 212 m³/h. Heat transfers from the refrigerant to the condenser water, causing the refrigerant to desuperheat, condense, and subcool. The now-liquid refrigerant exits the condenser bottom at high pressure but near-ambient temperature. The warmed condenser water returns to the cooling tower where evaporative cooling rejects the absorbed heat to the atmosphere.

Step 3 — Expansion (Thermal Expansion Valve): High-pressure liquid refrigerant passes through the thermal expansion valve (TXV), which creates a precisely controlled pressure drop. As the refrigerant pressure drops, a portion flashes to vapor, cooling the remaining liquid to the saturation temperature corresponding to the evaporator pressure. The TXV modulates its orifice based on evaporator superheat, ensuring that the evaporator tubes are fully wetted with liquid refrigerant without flooding liquid back to the compressor suction — a condition that would cause catastrophic compressor damage.

Step 4 — Evaporation (Evaporator): The low-pressure, low-temperature liquid-vapor refrigerant mixture enters the shell side of the flooded evaporator. Chilled water — the medium that ultimately provides cooling to the process — flows through the tube bundle at flow rates from 30 to 162 m³/h, transferring its heat to the refrigerant. The refrigerant boils at a constant low temperature (typically 2-7°C for comfort cooling, lower for process applications), absorbing the latent heat of vaporization. The resulting saturated or slightly superheated vapor returns to the compressor suction, completing the cycle.

The microcomputer PID controller continuously samples the leaving chilled water temperature and adjusts compressor staging — activating one or both compressors — to match refrigeration capacity to the instantaneous thermal load. This demand-based operation, combined with the multi-compressor design, ensures that the industrial chiller operates at its highest efficiency point for the majority of its runtime.

System Configuration — Cooling Tower & Pump Integration

The SML water-cooled chiller does not operate in isolation — it is the central component of a complete chilled water system. A typical installation includes the following subsystems:

• Cooling Tower: Rejects the heat absorbed by the condenser water to the atmosphere through evaporative cooling. Tower selection must match the chiller's heat rejection rate, which equals the cooling capacity plus the compressor power input (approximately 120-125% of nominal refrigerating capacity). For the SML-800S, this translates to roughly 1,000,000 kcal/h of heat rejection.
  

• Condenser Water Pumps: Circulate water between the chiller condenser and the cooling tower at the flow rates specified in the technical table above. Pump head must account for the condenser pressure drop (<100 KPa), cooling tower elevation, and piping friction losses.
  

• Chilled Water Pumps: Circulate chilled water from the evaporator to the process loads (air handling units, process heat exchangers, injection molding machines, etc.) and back. Primary-secondary pumping configurations are common for large systems with multiple chillers or variable flow requirements.
  

• Expansion Tank: Accommodates the volumetric expansion and contraction of water in the closed chilled water loop as temperature fluctuates between operating and ambient conditions. Properly sized expansion tanks prevent system pressure excursions that could cause relief valve lifting or pump cavitation.
  

• Automatic Makeup Water System: Compensates for minor water losses due to evaporation, leaks, or maintenance draining.
  

• Water Treatment: Both the condenser water (open loop) and chilled water (closed loop) circuits require chemical treatment to control scale formation, corrosion, and biological growth. Neglected water treatment is the leading cause of heat exchanger fouling and performance degradation.

For screw feeder and automatic feeding machine systems that require temperature-controlled material handling, the chilled water loop can be extended to include jacket cooling on feed throats and barrels of downstream equipment. Chenxing Machinery provides system engineering guidance to ensure proper integration of the chiller with your existing or planned facility infrastructure.

Industrial Applications

Plastic Processing & Extrusion

The SML water-cooled chiller serves as the cooling backbone for plastic processing plants, maintaining precise temperature control across multiple process stages:

• Pipe Extrusion Lines: Chilled water circulates through vacuum calibration tanks and cooling baths to solidify extruded PVC, PE, and PP pipes at controlled rates. Temperature stability directly affects pipe ovality, wall thickness consistency, and surface finish. A single SML-300S can support multiple extrusion lines simultaneously.

• WPC Foam Board Extrusion: The Celuka foaming process requires precise die and calibrator temperature control within a narrow window (typically 15-25°C). The PID control of the SML chiller maintains this temperature band regardless of ambient seasonal variations.

• Pelletizing Lines: Strand pelletizers and underwater pelletizers both require chilled water at controlled temperatures for strand cooling or die-face cooling. The PVC hot-cutting pelletizing line particularly benefits from consistent cooling water to maintain granule quality.

• Plastic Recycling: Washing lines, shredders, and granulators generate significant heat during operation. The chiller provides cooling for plastic crusher bearing housings and plastic grinding machine milling chambers, preventing thermal degradation of heat-sensitive materials.

Chemical & Pharmaceutical Manufacturing

Exothermic chemical reactions require precise temperature control to maintain reaction rate, selectivity, and safety. The SML chiller supplies chilled water or glycol-water mixtures to reactor jackets, condenser coils, and crystallization vessels. In pharmaceutical API manufacturing, temperature deviations of even 1-2°C can alter crystal morphology and impact final drug bioavailability. The multi-compressor staging of the SML series is particularly valuable here: reactors may require full cooling capacity during the exothermic phase but minimal capacity during the holding and cooling-down phases.

Food & Beverage Processing

Food processing applications — dairy pasteurization, brewery fermentation temperature control, chocolate tempering, meat processing — demand chillers that deliver consistent cooling without compromising hygiene. While the SML chiller itself is located in the mechanical room, its chilled water serves food-grade plate heat exchangers throughout the facility. The shell-and-tube evaporator's cleanability and the system's stable temperature control (±0.5°C) make it suitable for processes governed by HACCP temperature critical control points.

Central Air Conditioning (HVAC)

Large commercial buildings, hospitals, hotels, and shopping malls rely on water-cooled centrifugal or screw chillers as the central cooling plant. The SML series, with capacities from 185 kW to 947 kW, covers the range required for buildings with 5,000 to 50,000 square meters of conditioned floor area. Water-cooled chillers deliver higher full-load and part-load efficiency than air-cooled alternatives, particularly in hot climates where air-cooled condenser capacity degrades as outdoor ambient temperature rises.

Data Center Cooling

Modern data centers with server rack densities exceeding 10 kW per rack require continuous, high-reliability cooling. The SML chiller's dual-compressor design provides inherent redundancy: if one compressor fails, the remaining compressor continues to provide partial cooling, buying time for repair without a complete server shutdown. The microcomputer PID controller's communication capability allows integration with the data center's building management system for coordinated cooling optimization across multiple chillers.

Metalworking & Machining

CNC machining centers, EDM machines, laser cutters, and induction heating equipment all require cooling to maintain dimensional accuracy and tool life. The SML chiller can serve a central chilled water loop feeding multiple machine tools, with each machine's flow controlled by individual modulating valves. For disc grinding pulverizer and crushing and grinding machine operations in metal powder production, chilled water cooling prevents oxidation and thermal expansion that would compromise particle size distribution.

Why Choose Chenxing Machinery

Chenxing Machinery, headquartered in Zhangjiagang City, Jiangsu Province, brings over 20 years of engineering and manufacturing experience to every chiller we produce. Our 20,000-square-meter production facility houses advanced CNC machining centers, automated welding stations, and a dedicated chiller assembly and testing area. Every SML chiller undergoes a comprehensive factory acceptance test (FAT) before shipment — including pressure testing at 1.5× design pressure, vacuum holding test, control system functional verification, and a 4-hour full-load run test with calibrated instrumentation.

We are not a trading company reselling generic equipment. We design, manufacture, and service the products bearing our name. This direct factory model offers three concrete advantages for industrial buyers:

1. Direct Pricing Without Intermediary Markup: Factory-direct sales eliminate distributor and agent margins, delivering competitive pricing even for single-unit orders.

2. Engineering Responsiveness: Need a custom voltage (480V/60Hz for North America, 415V/50Hz for Southeast Asia), a different refrigerant (R134a, R407C), corrosion-resistant tube materials (copper-nickel for seawater condenser cooling), or a specific control integration protocol? Our in-house engineering team modifies designs at the source — no third-party communication delays.

3. Lifetime Technical Support: From remote commissioning via video call to on-site technician dispatch for complex installations, we remain engaged with your equipment throughout its operational life. Spare parts are stocked for same-day dispatch.

For buyers sourcing multiple pieces of equipment — say, a high-speed mixer for compounding, a pelletizing line for granulation, a vibrating screen for classification, and the SML chiller for process cooling — consolidating with a single supplier simplifies logistics, commissioning scheduling, and warranty management.

Explore our complete product catalog at chenxingmachinery.com for the full range of plastic recycling solutions, extrusion lines, and auxiliary equipment including screw feeder systems and automatic feeding machine units.

Frequently Asked Questions

Q1: How do I select the right SML model for my application?

Model selection starts with the required cooling capacity in kcal/h or kW, which depends on your process heat load calculation. For plastic extrusion cooling, a rule of thumb is that the chiller capacity should be 1.2 to 1.5 times the total heat load to account for safety margin and transient demand spikes. Provide our engineering team with your chilled water supply/return temperatures (typically 7°C supply / 12°C return for comfort cooling, or lower for process applications), required flow rate, and ambient wet-bulb temperature at your location. We will recommend the optimal SML model and condenser water system configuration. For applications with highly variable loads — such as batch chemical reactors — the dual-compressor models (SML-300S and above) are strongly recommended to maintain efficiency during low-demand periods.

Q2: What is the difference between water-cooled and air-cooled chillers, and when should I choose water-cooled?

Water-cooled chillers reject heat to a cooling tower water loop, while air-cooled chiller units reject heat directly to ambient air via finned-tube condensers and fans. Water-cooled systems offer three compelling advantages: (1) higher energy efficiency — the condensing temperature is tied to the wet-bulb temperature (typically 25-28°C) rather than the dry-bulb temperature (35-40°C+), resulting in a lower compressor pressure lift and 15-25% lower energy consumption; (2) longer equipment life — compressors operate at lower discharge temperatures and pressures, reducing mechanical stress and oil degradation; (3) smaller footprint per kW of cooling — water-cooled condensers are more compact than air-cooled coils of equivalent capacity. The trade-off is that water-cooled systems require cooling towers, condenser water pumps, water treatment, and makeup water — adding first cost and ongoing maintenance. Choose water-cooled when: cooling capacity exceeds 100 kW, the equipment runs more than 4,000 hours per year, water is available and affordable, and indoor equipment room space is at a premium.

Q3: What cooling tower capacity is required for the SML chiller?

The cooling tower must reject the heat absorbed from the process (chiller cooling capacity) plus the compressor power input converted to heat. As an approximate engineering guideline, cooling tower capacity should be 1.2 to 1.3 times the chiller's nominal refrigerating capacity in kcal/h. For the SML-500S (570,000 kcal/h cooling capacity, 162 kW compressor power), the heat rejection is approximately 570,000 + (162 × 860) = 709,320 kcal/h, so a cooling tower rated at approximately 850,000 kcal/h (or 175 RT) would be appropriate. Our engineering team performs detailed cooling tower selection as part of the project quotation, accounting for your site's design wet-bulb temperature and approach requirements.

Q4: Can the SML chiller operate with glycol-water mixtures for low-temperature applications?

Yes, the SML chiller can operate with ethylene or propylene glycol-water mixtures for chilled water temperatures below 4°C (down to approximately -10°C, depending on glycol concentration). However, glycol reduces the heat transfer coefficient and increases pump power due to higher viscosity. When glycol is specified, our engineering team derates the chiller capacity accordingly — typically 3-5% capacity reduction for every 10% glycol concentration by volume — and may recommend a larger model to meet the same effective cooling load. Glycol also requires periodic concentration testing and inhibitor replenishment. For plastic grinding machine and pulverizer cooling applications where outlet water temperatures below 10°C are beneficial, glycol mixtures are commonly used to prevent evaporator freeze-up during low-load conditions.

Q5: What maintenance does the SML chiller require?

Preventive maintenance for the SML water-cooled chiller focuses on three areas: heat exchanger cleanliness, refrigeration circuit integrity, and water treatment. Condenser tubes should be mechanically brushed or chemically cleaned annually (or more frequently in hard-water areas) to remove scale — even 1 mm of scale can reduce heat transfer by 10-15% and increase compressor energy consumption correspondingly. Refrigerant charge and oil level should be checked quarterly; declining oil level may indicate oil logging in the evaporator, while declining refrigerant charge suggests a slow leak requiring leak detection and repair. Water treatment for both condenser and chilled water circuits must be maintained continuously — glycol concentration (if used) should be tested semi-annually, and corrosion inhibitor levels checked quarterly. The compressor oil should be sampled annually for laboratory analysis to detect early signs of bearing wear or moisture contamination. Chenxing Machinery provides a detailed maintenance manual and schedule with each chiller, and our technical support team can review your maintenance program for completeness.

Q6: Can Chenxing provide the complete chilled water system, not just the chiller?

Yes. Chenxing Machinery offers the SML chiller as part of a complete turnkey cooling system package that can include: cooling tower (with selection based on your local wet-bulb design conditions), condenser and chilled water pumps (end-suction or inline configurations), expansion tank and air separator, chemical pot feeder for water treatment, and a system control panel coordinating chiller, pumps, and cooling tower fan. We provide P&ID (piping and instrumentation diagram) review, recommended equipment layout, and commissioning support. For buyers also sourcing upstream and downstream equipment — plastic pelletizer systems, disc grinding pulverizer machines, vibrating screen classifiers, or crushing and grinding machine units — consolidating with Chenxing simplifies project coordination and single-source accountability.

Q7: What is the lead time for an SML chiller order?

Standard lead time for SML series water-cooled chillers is 6-10 weeks from order confirmation, depending on model and configuration complexity. This includes: 2-3 weeks for component procurement (compressors, heat exchanger shells, control components), 3-4 weeks for fabrication and assembly, and 1-2 weeks for factory testing and final inspection. Rush orders can be accommodated on a case-by-case basis — contact our sales team with your required delivery date for availability confirmation. For complete production lines involving multiple machines — extruders, high-speed mixer units, pelletizing lines, and the chiller — we coordinate staggered production to ship all equipment in a single container load where possible, minimizing freight cost and customs clearance complexity.

Q8: Is the SML chiller CE certified for the European market?

Chenxing Machinery holds ISO 9001:2008 quality management system certification, and our products are CE marked in compliance with applicable European directives including the Machinery Directive (2006/42/EC), Low Voltage Directive (2014/35/EU), and Electromagnetic Compatibility Directive (2014/30/EU). The electrical control panel is built to IEC 60204-1 standards with proper segregation of power and control circuits, emergency stop functionality, and safety interlocks. Pressure vessels (condenser and evaporator shells) are manufactured and tested in accordance with relevant pressure equipment standards. For markets requiring specific certifications (UL for North America, GOST for Russia/CIS, SASO for Saudi Arabia), please inform our sales team during the inquiry stage so that certification requirements can be incorporated into the project scope.

Inquiry & Quotation — 4 Simple Steps

Step 1 — Tell Us Your Cooling Requirements

Send us the following information to begin the technical evaluation:

• Required cooling capacity (kW or kcal/h), or process description with heat load data

• Chilled water supply/return temperatures required (e.g., 7°C supply / 12°C return)

• Site conditions: ambient wet-bulb temperature, altitude (affects cooling tower performance), available electrical supply (voltage, phase, frequency)

• Application type: process cooling, HVAC comfort cooling, data center, or other

• Special requirements: glycol mixture (indicate percentage), corrosion-resistant materials, communication protocol (Modbus, BACnet)

  
  

Step 2 — Receive a Tailored Technical Proposal

Our HVAC engineering team reviews your requirements and prepares a detailed proposal including:

• Recommended SML model with capacity verification against your load profile

• Cooling tower and pump specifications

• System P&ID schematic (for complete system orders)

• Equipment layout recommendations

• Compliance statement for applicable standards and certifications

• Comprehensive quotation with shipping terms (FOB/CIF) and estimated delivery lead time

Proposals are typically delivered within 24 business hours.

Step 3 — Optional Factory Visit or Video Inspection

• Visit Zhangjiagang: Tour our manufacturing facility, see chillers in various stages of assembly, and witness a live test run. We are approximately 2 hours by car from Shanghai.

• Video Inspection: If travel is not feasible, we conduct a live video walkthrough of your completed chiller running a full-load factory acceptance test with real-time instrumentation data shared on screen.

• Third-Party Inspection: We welcome SGS, Bureau Veritas, TUV, or your designated inspector at any stage of production.

  
  

Step 4 — Production, Shipping & Commissioning

• Chiller is manufactured to your specifications (6-10 weeks standard lead time)

• Pre-shipment inspection and certified test run with test report documentation

• Container loading and sea/rail freight to your destination port

• Optional: Chenxing engineer dispatched to your site for installation supervision, commissioning, and operator training

• Your team achieves independent operation at rated performance — typically within 3-5 days after system fill and power-on

Contact Nicole directly:

Inquiry response time: Within 12 business hours. For urgent inquiries, WhatsApp messages typically receive a reply within 2 hours during China business hours (UTC+8, 8:00-18:00).