Description
General Specifications and Technical Details
Applications
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Typical Use: Commercial and industrial air conditioning, refrigeration systems, and heat pumps.
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Function: Controls the automatic adjustment of refrigerant flow rate and can also be used for suction line pressure control.
Refrigerant Compatibility
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Broad Compatibility: Applicable for most common refrigerants, including HFC, HFO, HCFC, and some flammable refrigerants (e.g., R22, R134a, R404A, R407C, R410A, R507, R1234ze, R32, R290, R448A, R449A, R452A, R513A).
Performance Range
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Cooling Capacity: Ranges from approximately 54 to 1495 kW (based on R134a nominal capacity).
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Full Stroke Steps: Up to 3800 steps (varies by model size, e.g., VPF 12.5/25/50: 2600 steps; VPF 400: 3800 steps).
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Max. Operating Pressure (MWP/PS): Up to 4.5 MPa (varies by model).
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Max. Opening Pressure Differential (MOPD): Up to 3.9 MPa (Forward and Reverse, varies by model).
Operating Conditions
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Medium Temperature (TS): -40C to +90C.
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Ambient Temperature: -40C to +60C.
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Relative Humidity: 0 to 100% RH.
Electrical Parameters
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Rated Voltage: 12V DC (rectangular wave).
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Actuating Mode: 2-phase, 4-step permanent magnet stepping motor (bi-pole actuation).
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Protection Class: IP 67 (highly protected against dust and immersion in water).
The Sanhua VPF series is positioned as a reliable, high-precision, and robust solution for demanding commercial and industrial HVAC&R applications that require excellent capacity control and efficiency, particularly in reversible systems.
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