Quick Coupler Series – Model Selection The Hongsen Quick Coupler Series HS-MH-R744 / HS-ML-R744 is available in multiple configurations for different refrigerants and HVACR servicing requirements. The model range includes couplers for R744 (CO₂), R1234yf, and R134a refrigerant systems, with dedicated high-side and low-side options. Model Selection Description R744 (CO₂) Models:HS-MH-R744 is designed for high-side applications, while HS-ML-R744 is designed for low-side servicing. Both feature a 1/4 SAE connection and manual operation. R1234yf Models:HS-MH-1234 provides high-side connection, while HS-ML-1234 is designed for low-side applications. Both are manual-type couplers for R1234yf systems. R134a Models:HS-MH-S and HS-ML-S include an M14×1.5 / 1/4 SAE adapter for high- and low-side servicing. The HS-MH-S 1/4 SAE and HS-ML-S 1/4 SAE models provide direct 1/4 SAE connections. Manual-Type Design: All models use a manual operating design for convenient refrigerant system servicing and connection. High & Low-Side Options: Dedicated high-side and low-side models help technicians select the appropriate coupler for different AC service applications. Wide Refrigerant Compatibility: Covers R744 (CO₂), R1234yf, and R134a, making the series suitable for a variety of modern automotive AC and HVACR systems. This model range is suitable for refrigerant charging, automotive air conditionin
Quick Coupler Series HS-MH-R744/HS-ML-R744
The Hongsen Quick Coupler Series HS-MH-R744 / HS-ML-R744 is designed for R744 (COâ‚‚) refrigerant systems where reliable connections and high-pressure performance are essential. Manufactured to meet the J639 standard, these quick couplers feature a self-locking structure and adjustable opening mechanism for secure connections and precise refrigerant filling. The one-piece valve body is engineered for ultra-high-pressure applications, with a burst pressure exceeding 8,700 PSI (60 MPa). This makes the series suitable for professional automotive AC, refrigeration, and HVACR servicing, including hig
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