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REFRIGERANT LINE SERVICE VALVES
Service Valves
Often referred to as an isolation valve, our FJ series service valve is designed to isolate a specific component from the rest of the circuit, while keeping the non-isolated refrigerant circulating through the system. Essential service and maintenance activities can be undertaken without disrupting the regular operation of the system, such as withdrawing or refilling the refrigerant charge.
Read the full selection table and product data below or get in touch for more indepth system technical advice.
Ensure Safe and Reliable Process Flows with Service Valves
Arguably one of the most important valves, service valves will be invaluable to service engineers who may utilise the valve to check for problems. Service valves are usually located either side of the compressor, allowing for temporary isolation of the compressor from the rest of the system without interrupting the correct functioning of the system. Engineers can perform several tasks with the service valve including removing refrigerant from an overcharged system, for adding new replacement refrigerants into the lines, to add additional refrigerant to top off loss due to a leak or to measure the refrigerant gas pressure in the system.
Versatilty with Refrigerants
FJ service valves are applicable with various refrigerants including R134a, R407c, R410a, R32, R404a and R290.
Ease of Maintenance
Dunan service valves are designed to isolate parts of the system, allowing for maintenance, pressure readings, and refrigerant management without disrupting the entire operation.
Designed to Offer Secure and Reliable performance in HVACR Systems
Dunan service valves offer durability and reliability, even in the most demanding conditions. They are designed to connect indoor and outdoor units, close or open the refrigerant circuit, and evacuate the refrigerant or charge refrigerant into split air conditioner systems.
FJ Series
FJ series service valves have a critical role in the productivity and safety of refrigeration systems. They feature a combination of soft seal and hard seal to ensure air tightness.
Operating Temperature
Applicable Relative Humidity:<-95%
Max Temperature: -30 ~ +120C
Ambient Temperature: -30~70
Operating Pressure
Max Operating Pressure: 4.5MPa
FJ Series
| Model | Port (mm) | Kw (m3/h) | Applicable Refrigerant | |
| Connection Tube Nut Side Inlet | Connection Cooper Tube Side Inlet | |||
| FJ04 | 4.8 | 0.45 | 0.50 | R410A R32 R290 R407C R134a R404A |
| FJ08 | 7 | 1.30 | 1.47 | |
| FJ10 | 10 | 2.36 | 2.78 | |
| FJ13 | 13 | 3.38 | 4.01 | |
| FJ16 | 16 | 7.12 | 7.26 | |