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4VD/4VG
DMZL
The DMZL 4-Cylinder Low/Mid-Temp Semi-Hermetic Piston Compressor (3-9HP) is designed for small to medium refrigeration systems operating at -10℃ to 12.5℃. It combines flexibility, durability, and low maintenance, making it a top choice for the catering industry, small cold storage facilities, and community pharmacies. The compressor’s 4-cylinder design ensures smooth operation, while its compatibility with common refrigerants (R404A, R22, R134A) makes it adaptable to diverse regional needs.
Hotels, large restaurants, and catering companies rely on 30-80 m³ kitchen coolers to store ingredients like vegetables, dairy, and prepared meals. This compressor maintains a stable temperature of 0-5℃, preventing bacterial growth and ensuring food safety compliance (e.g., HACCP, FDA). Its low noise level (≤63 dBA) avoids disrupting kitchen operations, and its general-purpose spare parts ensure quick repairs— critical for busy catering businesses that can’t afford downtime.
Local farmers, food co-ops, and small distributors often operate 50-150 m³ cold storage facilities to store seasonal produce (e.g., apples, potatoes, berries). This compressor cools these spaces to 2-5℃, extending the shelf life of produce by 40% compared to ambient storage. Its efficient valve design reduces energy consumption by 12% compared to similar models, lowering monthly utility costs for small businesses.
Community pharmacies and small clinics require cool rooms (10-20 m³) to store non-frozen pharmaceuticals— such as vitamins, oral medications, and topical creams— at 2-8℃. This compressor’s PTC motor protector prevents overheating, ensuring continuous operation and compliance with pharmacy regulations (e.g., USP <1079>). Its hermetic structure also prevents refrigerant leakage, which could contaminate medications and harm patients.
• Dual Lubrication Options: Customers can choose between centrifugal lubrication (for fixed installations like cold storage) or forced lubrication (for mobile applications like small refrigerated vans). This flexibility allows the compressor to adapt to different use cases without redesign.
• Minimal Dead Space: The cylinder heads are CNC-machined to reduce dead space to ≤3%. This improves compression efficiency by 8% and ensures consistent cooling performance across the compressor’s operating range.
• Dual Motor Protection: The compressor includes both internal PTC sensors and external protection modules (6-wire connection) that guard against motor burnout from overheating or electrical surges. This double protection reduces the risk of motor failure by 50%.
• High-Grade Cast Iron Crankcase: Made from HT250 cast iron, the crankcase withstands temperature fluctuations (-10℃ to 50℃) without cracking. It also resists corrosion from refrigerant vapors, ensuring long-term durability.
• Low-Friction Bearing Sets: The bearings use a molybdenum disulfide coating that reduces friction by 8%. This cuts energy loss and extends the bearings’ service life to 8,000+ hours.
• Universal Spare Parts: Valves, gaskets, and oil filters are compatible with most DMZL 4-cylinder compressors. This eliminates the need for customers to stock unique parts for each model, reducing inventory costs by 30%.
• Free Online Courses: Our learning portal offers self-paced courses for technicians, covering topics like compressor disassembly, cleaning, and reassembly. Each course includes video tutorials and hands-on quizzes to ensure understanding.
• Maintenance Manual with Videos: We provide a detailed maintenance manual that includes step-by-step videos for common tasks— such as oil replacement, valve adjustment, and leak detection. This helps customers with limited technical experience perform basic maintenance.
• Global Spare Parts Centers: With warehouses in Asia, Europe, and North America, we ensure spare parts are delivered within 1-3 business days. This reduces downtime for customers in all regions.
• Tiered Warranty: A 1.5-year warranty covers the entire compressor, with a 2-year warranty on critical components like the crankshaft and pistons. This provides comprehensive protection for high-wear parts.
• Dual-Voltage Motors: For regions with inconsistent electricity (e.g., parts of Asia, Africa), we offer dual-voltage motors (220V/380V) that adapt to voltage fluctuations. This ensures stable operation even in unreliable power grids.
• Refrigerant Compatibility Adjustments: We can modify the compressor to support additional refrigerants (e.g., R507A) based on customer needs. This customization is done at no extra cost for bulk orders.
