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Suitable for cold rooms storing produce, meat, and seafood, this piston compressor offers 3–50HP options, with cooling capacity matched to power. It features rapid temperature pull-down, low noise, and high energy efficiency, supported by solid after-sales service and timely shipment.
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As a premier manufacturer and global supplier of commercial cooling solutions, we present the 5HP R404a Piston Semi-Hermetic Refrigeration Compressor.
Engineered for heavy-duty cold storage, this unit delivers exceptional thermal extraction and unwavering operational stability for large-scale facilities.
Optimized for R404a, R507, and R22 refrigerants, ensuring versatile integration into existing systems.
Features a robust 5HP / 3.7kW nominal power output with advanced centrifugal lubrication for a prolonged lifecycle.
Direct-from-factory customization and bulk availability to meet the exacting demands of industrial procurement.
Step into a cold room powered by our 5HP semi-hermetic piston compressor, and you will immediately notice the crisp, perfectly chilled air, devoid of the harsh mechanical clatter typical of lesser units. The robust cast-iron casing feels cool and solid to the touch, a testament to the heavy-duty craftsmanship designed to withstand the most demanding industrial environments. By integrating this powerhouse into your commercial refrigeration infrastructure, you are not merely purchasing a machine; you are investing in absolute temperature certainty. It rapidly pulls down ambient heat, locking in the freshness, texture, and nutritional value of sensitive inventory like premium seafood, prime cuts of meat, and delicate agricultural produce. The meticulous engineering minimizes internal friction, which translates to a smooth, low-hum operation that keeps your facility running seamlessly. This compressor empowers facility managers to drastically reduce spoilage rates, optimize electrical consumption, and maintain strict compliance with health and safety standards, ultimately safeguarding your bottom line and elevating your operational efficiency.
Compressor Model | Motor Nominal Power HP/kW | Displacement (1450rpm 50Hz/60H | cylinders× diameter× itinerary mm | Suction, Discharge Line mm | Oil Volume L | Power Supply V/Ф/Hz | Electrical Parameters | Crankcase Heater （220V） W | Fuel supply mode | Weight kg | ||
DL Discharge Valve | SL Suction Valve | （A） Max Operating Current | （A） Starting/ Locked Current | |||||||||
4VB3.2Z | 3/2.2 | 18.1/21.8 | 4×Ф41×39.3 | Ф16 | Ф22 | 2 | 220-240 △/380-420Y/3/50 265-290 △/440-480/3/60 | 15.9/9.2 | 76.6/44.2 | 120 | Centrifugal lubrication | 82 |
4VB5.2G | 5/3.7 | 18.1/21.8 | 4×Ф41×39.3 | Ф16 | Ф22 | 2 | 18.7/10.8 | 107.7/62.2 | 120 | 86 | ||
4VB4.2Z | 4/3 | 22.7/27.4 | 4×Ф46×39.3 | Ф16 | Ф28 | 2 | 18.5/10.7 | 92.7/53.2 | 120 | 84 | ||
4VB6.2G | 6/4.4 | 22.7/27.4 | 4×Ф46×39.3 | Ф22 | Ф28 | 2 | 22.9/13.2 | 107.7/62.2 | 120 | 86 | ||
4VB5.2Z | 5/3.7 | 26.8/32.4 | 4×Ф50×39.3 | Ф22 | Ф28 | 2 | 23.4/13.5 | 107.7/62.2 | 120 | 85.5 | ||
4VB7.2G | 7/5.1 | 26.8/32.4 | 4×Ф50×39.3 | Ф22 | Ф28 | 2 | 27.5/15.9 | 142.8/82.4 | 120 | 88.5 | ||
4VB6.2Z | 6/4.4 | 32.5/39.2 | 4×Ф55×39.3 | Ф22 | Ф28 | 2 | 27.5/15.9 | 142.8/82.4 | 120 | 90.5 | ||
4VB9.2G | 9/6.6 | 32.5/39.2 | 4×Ф55×39.3 | Ф22 | Ф28 | 2 | 34.5/20 | 142.8/82.4 | 120 | 90.5 | ||
When sourcing core components for commercial freezing systems, performance metrics and build quality are non-negotiable. This compressor is engineered to deliver unparalleled value through its meticulously refined architecture.
Accelerated Thermal Transfer: The precision-machined valve plates and optimized cylinder geometry ensure rapid heat absorption, bringing massive storage spaces to target temperatures in a fraction of the standard time.
Heavy-Duty Cast Iron Housing: Feel the heft of the industrial-grade casing, designed to absorb internal stresses and shield the internal mechanics from corrosive ambient moisture.
Intelligent Fluid Dynamics: The internal pathways are sculpted to minimize gas turbulence, ensuring a smooth, continuous flow of the R404a refrigerant, which directly translates to lower energy expenditure.
Seamless Integration: Designed with standardized mounting points and suction/discharge line dimensions, allowing installation crews to swap out old units or build new racks with zero guesswork.
Achieving and maintaining deep freeze conditions requires a compressor that does not falter under heavy thermal loads. This 5HP unit is calibrated for maximum volumetric efficiency.
Rapid Temperature Pull-Down: The high-displacement capacity guarantees that newly stocked inventory is flash-chilled, preserving cellular integrity in meats and preventing wilting in produce.
Broad Evaporating Range: Capable of operating flawlessly across a wide temperature spectrum (from -40℃ down to -5℃), making it a versatile backbone for both blast freezers and standard chilling rooms.
Exceptional COP (Coefficient of Performance): By maximizing the cooling output per kilowatt of electricity consumed, facility operators will notice a tangible reduction in monthly utility overheads.
Continuous Duty Cycle: Built to run relentlessly during peak seasonal demands without experiencing thermal degradation or loss of pumping capacity.
Downtime in commercial storage equates to catastrophic financial loss. We have fortified this compressor with a multi-layered defense system to ensure uninterrupted service.
Internal Motor Protector: Embedded thermistors actively monitor winding temperatures, instantly cutting power if thermal limits are breached, thereby preventing catastrophic motor burnout.
Integrated Pressure Relief Valve: Safeguards the structural integrity of the casting by automatically venting excess pressure if system blockages occur, averting potential blowouts.
Robust Crankcase Heater: The standard 120W (220V) heater prevents refrigerant migration and oil foaming during off-cycles, ensuring crisp, fully lubricated start-ups even in freezing ambient conditions.
Centrifugal Lubrication System: A meticulously balanced crankshaft drives oil to every critical bearing surface, creating a protective hydrodynamic film that drastically reduces metal-on-metal wear.
Industrial equipment does not have to be deafening. We understand that a quiet acoustic environment is crucial for workplace safety and compliance in modern processing plants.
Acoustically Dampened Casting: The dense, thick-walled iron construction naturally absorbs high-frequency mechanical whining, resulting in a low, unobtrusive hum.
Precision-Balanced Crankshaft: Dynamic balancing eliminates eccentric rotational forces, ensuring the unit runs smoothly without transmitting destructive vibrations into the piping network.
Advanced Piston Ring Geometry: The specialized rings create a perfect seal against the cylinder walls, eliminating gas blow-by and the associated hissing noises.
Vibration Isolation Mounts: Engineered to sit on high-density polymer or spring isolators, severing the acoustic bridge between the compressor deck and the building structure.
Environmental stewardship and regulatory compliance are at the forefront of modern facility management. This compressor is designed to keep refrigerants exactly where they belong—inside the system.
Optimized for R404a: Fully compatible with low-toxicity, non-flammable refrigerants, providing exceptional latent heat absorption while meeting stringent environmental safety protocols.
Semi-Hermetic Integrity: The bolted, gasket-sealed architecture eliminates the vulnerable shaft seals found in open-drive units, virtually eradicating the risk of insidious gas leaks.
Premium Gasket Materials: We utilize advanced, chemically inert sealing compounds that resist degradation from synthetic POE oils and extreme temperature fluctuations.
Serviceable Architecture: Unlike fully hermetic units, the semi-hermetic design allows maintenance crews to open the casing, replace internal components, and reseal it perfectly, extending the machine's lifecycle and reducing landfill waste.
No two cooling projects are identical. As a dedicated manufacturer, we provide flexible solutions tailored to the exact dimensional and thermal requirements of your specific application.
Versatile Application Matrix: Proven to deliver exceptional results across diverse environments, from pharmaceutical storage and supermarket display cases to massive agricultural holding facilities.
Comprehensive Capacity Range: While this 5HP unit is a workhorse, our full portfolio spans from 3HP up to 50HP, allowing you to scale your refrigeration racks precisely to your load calculations.
Expert Engineering Support: Our in-house team of thermal dynamics engineers is available to analyze your blueprints and recommend the exact configuration needed for optimal airflow and cooling.
OEM & Custom Fabrication: We offer deep customization services, providing detailed CAD drawings, specific voltage configurations, and tailored mounting solutions to integrate seamlessly into your proprietary equipment designs.
Procuring heavy machinery requires absolute confidence in the supplier. We back every unit with rigorous testing protocols and an unwavering commitment to your operational success.
Stringent Factory Testing: Before any compressor is crated, it undergoes brutal pressure tests, leak detection protocols, and loaded run-ins to ensure it meets our exacting performance baselines.
Global Certification Compliance: Manufactured in state-of-the-art facilities adhering to strict CE and CCC standards, guaranteeing international electrical and mechanical safety.
Expedited Global Logistics: Our streamlined supply chain and robust packaging ensure that your bulk orders arrive at your loading dock on schedule, free from transit damage.
Dedicated Technical Support: Our after-sales engineers are not just order-takers; they are refrigeration experts ready to assist your technicians with installation guidance, troubleshooting, and maintenance schedules.
If you don't know which model is suitable for you, please contact we without hesitation, after tell us your requirements, we shall be glad to give you our professional advise.
And if all this model don't suit for you, we have advanced software and professional team of engineers can design product for you.
We can provide designing data and prodcution drawings.
We have a wealth of exhibition experience, where we continuously showcase our products, exchange technologies and listen to customer demands. These are some real-time photos from the exhibition site, witnessing every step of our joint growth with the industry.
The standard products are ready for immediate use, while the customized ones are specially made for you. The difference lies not only in the product itself, but also in the depth of coordination throughout the entire service process.
From the initial communication of the plan to the satisfactory feedback received after the final product was delivered，we have customized products for many customers, these are some projects we did before，Covering various needs and scenarios.
To meet various scenarios and requirements, we have also introduced more product categories, aiming to provide you with a more comprehensive experience. Please click on each category label to quickly browse the preferred products.
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Partnering with the right manufacturer is the most critical decision in building a reliable refrigeration infrastructure. We do not just assemble parts; we engineer comprehensive cooling solutions designed to protect your most valuable assets.
Decades of Manufacturing Mastery: We bring years of metallurgical and thermodynamic expertise to the table, ensuring every casting and valve plate is machined to microscopic tolerances.
Direct-Source Economics: By eliminating intermediaries, we provide premium, industrial-grade equipment at highly competitive price points, maximizing your project's ROI.
Uncompromising Material Selection: We refuse to cut corners. From the high-grade copper in our motor windings to the specialized alloys in our pistons, every component is chosen for maximum endurance.
Future-Proof Engineering: We continuously invest in R&D, listening to the demands of facility operators to refine our designs for better energy efficiency and easier field serviceability.
Navigating the technical specifications of commercial cooling equipment can be complex. Below are detailed answers to the most common inquiries from facility engineers and procurement specialists.
Q1: Can this 5HP compressor operate efficiently in extreme ambient temperatures?
A: Yes. The robust cast-iron housing and advanced internal motor protector are specifically engineered to dissipate heat effectively. When paired with an appropriately sized condenser, it maintains stable pressure ratios even in sweltering mechanical rooms.
Q2: What type of lubrication oil is recommended for use with the R404a refrigerant in this unit?
A: For R404a and other HFC refrigerants, we strictly mandate the use of high-quality Polyolester (POE) synthetic oil. The compressor comes pre-charged with 2 liters of POE oil, which ensures optimal miscibility and return from the evaporator.
Q3: How does the centrifugal lubrication system differ from standard oil pumps?
A: Instead of relying on a separate mechanical pump that can fail, our centrifugal system utilizes the rotational force of the precisely machined crankshaft to draw oil upward and distribute it outward to the bearings. This provides a fail-safe, continuous hydrodynamic film.
Q4: Is it possible to integrate this compressor into an existing rack system running on R22?
A: Absolutely. While optimized for R404a, the compressor's valves and seals are fully compatible with R22. However, you must ensure the system is thoroughly flushed and the correct mineral or alkylbenzene oil is used if reverting to R22.
Q5: What is the lead time for a bulk order of these semi-hermetic compressors?
A: Our streamlined manufacturing processes allow us to maintain a steady inventory of standard components. For standard 5HP units, we typically process and dispatch bulk shipments within a highly competitive timeframe, ensuring your project timelines are met without delay.
