Description
Sanhua LDF Series: Features and Details
1. Core Function and Construction
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Primary Function: Electronically controlled on/off valve for refrigerant flow regulation.
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Key Design Feature: Engineered for Low Internal Leakage (e.g., $\leq 10 \text{ mL/min}$ for smaller models).
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Benefit: Ensures efficient system isolation and minimizes energy waste from refrigerant bypass when the valve is shut.
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Operating Type: Available as Direct-Operated or Pilot-Operated depending on the orifice size.
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Normal Position: Primarily Normally Closed (NC), meaning it is closed when unpowered.
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Compact Size: Features a compact design, making it easy to install in systems with limited space.
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Applications: Widely used in:
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Commercial Refrigeration and Freezing Systems.
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Ice Makers and Ice Cream Machines (where low leakage is critical).
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Air Conditioning and Heat Pump Systems (for precise control and isolation).
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Can be used on Liquid, Suction, and Discharge lines (must adhere to specific model parameters).
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2. Technical Specifications
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Refrigerant Compatibility: Applicable for a very wide range of refrigerants, including:
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Common HFCs/HCFCs (R22, R134a, R404A, R407C, R410A, R507A, etc.).
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New generation refrigerants: HFOs (A2L) and Hydrocarbons (HC/A3) like R290, R32, R1234yf, and R452B (GreenTech range).
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Maximum Operating Pressure (PS): High rating, typically up to 4.5 MPa (45 bar).
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Max. Operating Pressure Difference (MOPD): Robust MOPD, typically up to 3.1MPa (31bar).
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Medium Temperature (TS): Wide range, typically -30C to +120C.
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Coil Features: Coils are designed for low energy consumption and high reliability.
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Connections: Available in standard ODF (solder) connection sizes (e.g., 1/4” to 3/8”).
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