HITACHI Scroll Type Refrigeration Compressor E405DHD-36D2G E405DHD-38D2G E405DHD-42D2G

Key Technical Specifications Comparison

• Proven Technology, High Reliability:Piston compressors are a well-established technology known for their sturdy construction, making them particularly suitable for harsh operating conditions, high-pressure applications, or situations requiring high discharge pressure.

• Strong Resistance to Shock/Liquid Slugging:Compared to scroll compressors, piston compressors generally exhibit greater tolerance to liquid slugging (refrigerant returning to the compressor as liquid). This is a significant advantage in applications with less stable systems or complex operating conditions.

• Ease of Repair and Maintenance:As semi-hermetic compressors, their core moving parts (such as pistons, connecting rods, and valves) can be repaired or replaced in case of wear or failure. This significantly reduces the total cost of ownership over the entire lifecycle, avoiding the need for a complete unit replacement typical of hermetic compressors if a core component fails.

• Excellent Energy Efficiency:Through optimized design (e.g., high-efficiency motors, precision-machined valve plates, optimized flow paths), Hitachi ensures this series offers a high Coefficient of Performance (COP) under rated medium and low-temperature conditions.

• Broad Application Scope:This series is designed for medium and low-temperature applications, covering a wide range from refrigeration (approx. -10°C evaporation temperature) to freezing (approx. -40°C evaporation temperature). The codes "36D2G," "38D2G," and "42D2G" typically indicate different cylinder displacements, allowing selection based on varying cooling capacity requirements and providing flexibility for users.

• High-Efficiency Motor:Utilizes specially designed motors that are highly efficient and have high heat resistance grades, ensuring long-term motor reliability under demanding conditions.

• Wear-Resistant Components:Key parts like pistons, cylinders, and bearings are made from high-strength, wear-resistant materials and manufactured with high precision, ensuring long compressor life and low operational wear.

• Efficient Valves:Optimized valve plate design helps reduce flow resistance, increase volumetric efficiency, and thereby enhance overall performance.

• The robust design and high-quality material selection make it ideally suited for commercial and industrial applications requiring 24/7 continuous operation, such as large cold storage warehouses, chemical plants, and food processing centers.

• Repairability is a key advantage.If an internal failure occurs, it can often be repaired by replacing an internal repair kit, at a cost significantly lower than replacing the entire compressor. This is highly attractive for users who prioritize long-term operating costs and equipment availability.

• This compressor series is typically compatible with various common refrigerants, including R22(still used in some regions), R404A, R507, as well as newer environmentally friendly refrigerants like R448Aand R449A. This provides flexibility for system retrofits and new projects.

• Users pursuing long equipment service life and low lifecycle costs.

• Applications with harsh operating conditions, high demands on system stability, and potential risk of liquid slugging.

• Industrial refrigeration systems requiring low evaporation temperatures and high discharge pressures.

• Situations where maintenance convenience is critical (as they can be repaired on-site).

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