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China Access Valves for Refrigeration Systems - Reliable Suppliers and Factory Direct Quality

Access valves, commonly referred to as non-return valves or check valves, are essential components in the refrigeration systems of refrigerators. These valves are designed for unidirectional flow, enabling the refrigerant to flow in only one specified direction while effectively preventing any reverse flow. When the refrigerant moves forward, the access valve opens seamlessly, allowing for smooth passage. In contrast, if the refrigerant tries to flow backward, the access valve automatically shuts, blocking the reverse flow. Sourced from trusted suppliers and manufacturers in China, our access valves ensure high quality and reliability, making them a crucial part of any efficient refrigeration system. Choose our factory for top-notch access valves that meet your refrigeration needs

    Product Description

    Access valve is mainly composed of components such as a nylon valve needle, valve seat, limit ring and housing. Its internal structure may vary depending on the type, such as a ball valve or a needle valve. On the outer surface of the check valve, the direction of the refrigerant flow is usually marked with an arrow to ensure that it is not connected in reverse during installation.

    In the refrigeration system of a refrigerator, the main function of the access valve is to prevent the high-temperature and high-pressure vapor inside the compressor from flowing back into the evaporator when it stops, which could cause the evaporator to heat up and thus reduce the refrigeration efficiency. By connecting access valve, the high and low pressure inside the refrigeration system can be quickly balanced when the compressor stops, facilitating a restart.

    Application scenario

    1. Refrigeration system
    Refrigerator
    air conditioner
    2. Industrial fluid control
    Reliable flow management and regulation in industrial systems.
    3. Maintenance operation assistance
    Facilitates pressure testing, vacuuming, and refrigerant charging.

    Feature

    • Equipped with imported valve inside of reliable performance.
    • Double sealing ensure leak-tight.
    • Copper tube of various lengths and hardness are available.
    • Valve bonnet is knurled for easy handing.

    Technical Parameters

    Applicable Refrigerants
    HCFC and HFC
    Medium Temperature Range
    -25°C ~ +120°C
    Max Operating Pressure
    3.0 MPa
    Max Allowable Pressure
    3.0 MPa

    Structure

    Charging-Valve-2 - Flat Cap
    1. Flat cap
    Charging-Valve-3 - Needle Valve Cap
    2. Needle valve cap

    Specification

    Type Connection Size Overall Dimension Hexagonal S Thread M
    A B φD H L
    Type A 1/4 SAE 1/8” 60 14 3.17 94 11 7/16-20UNF
    3/16" 4.76
    1/4" 90 6.35 124
    Type B 1/4 SAE 1/4" 90 14 6.35 118 12 7/16-20UNF
    1/2 SAE 16 14 1/2-20UNF
    1/4 ACME 1/2-16ACME

    Pictures

    Charging-Valve-1
    Charging-Valve-4Charging-Valve-5Charging-Valve-7Charging-Valve-10

    Certificates

    patent-5patent-2patent-4patnet-1patnet-3
    Why Choose Us

    Frequently Asked Questions (FAQ)

    What is the primary function of the access valve in a refrigeration system?
    The primary function is to prevent high-temperature and high-pressure vapor inside the compressor from backflowing to the evaporator when the system stops. It also helps balance the high and low pressures quickly to facilitate compressor restart.
    What components make up the structure of the access valve?
    The access valve is mainly composed of a nylon valve needle, a valve seat, a limit ring, and a robust outer housing. The valve bonnet is knurled for easy handling.
    Which refrigerants are compatible with these access valves?
    These access valves are designed for compatibility with both HCFC and HFC refrigerants.
    What are the temperature and pressure limits for this product?
    The applicable medium temperature ranges from -25°C to +120°C. The maximum operating pressure and maximum allowable pressure are both rated at 3.0MPa.
    Are there options for different copper tube lengths and hardness?
    Yes, we provide copper tubes in various lengths and hardness profiles to meet diverse system design and installation requirements.
    How do I prevent reverse connection during installation?
    The outer surface of the check valve is marked with a flow direction arrow. Ensuring the refrigerant flow aligns with the arrow prevents reverse connection.