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Applicable for laboratory experiments, scientific research, vacuum packaging, refrigeration maintenance, and air conditioning repair Flow rate: 4.5 CFM (128 L/min), Power: 1/2 HP; Ultimate vacuum: 10–15 Pa; Inlet port compatible with 1/4" and 3/8" Flare or 8 mm vacuum hose; Oil capacity: 350 ml R32 explosion-proof design, compatible with multiple A1 refrigerants (e.g., R134A, R410A, R12, R22, R502) and A2L refrigerants (e.g., R32, R1234yf) Equipped with solenoid valve to effectively prevent oil backflow and extend equipment service life Note: Pump oil not included; Oil mist may occur during initial startup, which is normal; please contact us promptly if any issues arise