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Refrigeration Fittings
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Thermal technology
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Automotive thermal management
- Equipment manufacturing
![<!--<$[标题]>begin-->FDH Series Piston Type Check Valve<!--<$[标题]>end-->](/picture/0/7aa6aa07bf9049208eaa995049ae30bd.jpg)
FDH series piston type check valves are widely used in VRVs and commercial air conditioners, heat pump hot water heaters and commercial refrigeration. The piston type check valves are preferred at exhaust air tube because of better high temperature resistance performance.
FEATURES
• This valve can ensure the only correct flow direction to prevent back flow
• Damping spring design without installation angles limits
• FDHY reinforced spring-type valve for multiple compressors in parallel
OPERATION CONDITIONS
• Applicable Refrigerants: R410A, R32, R134a, R404A, R507, R290, R407C and R22, etc.(For R290, please confirm before placing orders.)
• Maximum Working Pressure: 4.5MPa
• Medium Temperature： -50℃~ +140℃
• Ambient Temperature：-30℃~ +55℃
• Relative Humidity： below 95%
TECHNICAL PARAMETERS
Model | Kv | Maximum Working Pressure | Min Open Differ Press |
（m3/h） | MPa | MPa | |
FDH10 | 1.03 | 4.6 | 0.005 |
FDH12 | 2.06 | 4.6 | 0.005 |
FDH16 | 3.6 | 4.6 | 0.005 |
FDH19 | 5.48 | 4.6 | 0.005 |
DIMENSIONS
Model | Connections （ΦD） | A | B | C | Weight | Order Number | |
inch | mm | mm | mm | mm | g | ||
FDH10 | 3/8 | 9.6 | 109 | 9 | 18 | 55.3 | FDH2605701000 |
FDH12 | 1/2 | 12.7 | 131 | 10 | 22 | 90 | FDH2606100005 |
FDH16 | 5/8 | 16.1 | 139 | 12 | 28 | 165 | FDH2605270001 |
FDH19 | 3/4 | 19.25 | 165 | 15 | 34 | 235 | FDH2606100018 |
