Description
Sanhua MDF Series: Features and Details
The MDF series includes both direct-operated and pilot-operated solenoid valves to cover a wide range of flow capacities and pressure requirements.
1. Core Function and Application
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Function: Acts as an electrically controlled on/off valve to start or stop refrigerant flow.
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Operating Type: Available in both Normally Closed (NC) (closed when unpowered) and Normally Open (NO) types.
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Mode of Operation: Available as:
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Direct Operated: For smaller port sizes.
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Pilot Operated: For larger port sizes, allowing higher flow and Maximum Operating Pressure Difference (MOPD).
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Key Applications:
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Refrigerating and Freezing Systems (Commercial and Industrial).
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Air Conditioners and Heat Pumps (for line isolation and defrost).
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Installation on Liquid, Suction, and Discharge lines (depending on model).
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2. Technical Specifications
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Refrigerant Compatibility: Applicable for all common HFC and HFO refrigerants including R134a, R404A, R407C, R410A, R448A, R449A, R450A, R452A, R507A, and R513A.
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Maximum Operating Pressure (MOP): Up to 4.3 MPa (43bar) in some models.
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Max. Operating Pressure Difference (MOPD): Great valve opening performance, with high MOPD, typically up to 3.1 MPa (31 bar) for AC coils (varies by model).
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Medium Temperature (TS): Ranges from -30C / -40C up to +105C+140C depending on the specific model variation (L/H ranges).
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Connections: Available with both Flare and Solder (ODF/Ext) connections, and in a wide range of port sizes (e.g., 1/4” up to 7/8” and larger).
3. Coil and Electrical Features
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Energy Efficiency: Coils are designed for low energy consumption.
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Safety & Durability: Coils are double-sealed, water-tight, and safe (often rated up to IP65 with a DIN plug).
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Installation: Quick installation coils (e.g., MQ-A11) are available for fast and easy mounting.
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Voltage: Available in common AC and DC voltages (e.g., 24V AC/DC, 110-120V AC, 220-240V AC).
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