Hydraulic Control One-way Valve A1Y-HB10B

1. Model analysis
-A1Y-HB10B is the naming convention of Yuken in Japan, with specific meanings:
-A1Y: Represents the series or type of hydraulic control check valve.
-HB: indicates that the valve is a hydraulic pilot operated check valve.
-10: Diameter specifications (such as 10mm or corresponding flow parameters).
-B: It may be a version or design code (such as sealing material, pressure rating, etc.).
2. Functional features
-One way valve function: allows oil to flow freely from the inlet (P → A) and blocks in the reverse direction (A → P).
-Hydraulic control opening: Apply pressure through the external control oil port (X) to push the valve core open and achieve reverse flow (A → P).
-Application scenarios: Commonly used for hydraulic cylinder pressure maintenance, locking circuits, or in situations where it is necessary to prevent uncontrolled load drop (such as cranes, injection molding machines).
3. Technical parameters (subject to actual samples)
-Work pressure: usually 21~31.5 MPa (depending on the model suffix).
-Opening pressure: The opening pressure of the one-way valve is about 0.03~0.05 MPa.
-Hydraulic control pressure ratio: about 1:2~1:4 (the control oil pressure needs to reach the ratio of the main oil circuit pressure to open).
-Flow rate: related to the diameter (e.g. 10 diameters correspond to approximately 40-60 L/min).
4. Precautions for installation and use
-Oil port identification:
-P: Oil inlet (forward flow inlet).
-A: Oil outlet (connected to the actuator).
-X: Hydraulic control oil port (connected to the control oil circuit).
-Installation direction: Ensure that the direction of the valve body arrow is consistent with the system requirements.
-Drain port: Some models require separate oil drain (such as with drain port Y), and there should be no back pressure return to the oil tank.
-Cleanliness: Hydraulic oil must meet ISO 18/15 or higher cleanliness standards to avoid valve core sticking.

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