A1Y Series Hydraulic Lock | A1Y-Ha32B A1Y-Hb32B | Pilot Operated Check Valve | NG32

A1Y & A2Y Series Hydraulic Lock (Pilot Operated Check Valve)

Product Overview: The A1Y and A2Y Series are essential pressure-maintaining components in industrial hydraulic systems, commonly known as “Hydraulic Locks.” Their primary function is to permit unidirectional oil flow and enable reverse flow via pilot pressure. Designed for applications requiring long-term Self-locking and Pressure Maintenance (such as outriggers and hydraulic press slide supports), the series ensures that actuators remain stationary even if the pump source fails. The NG32 (Size 32) specification handles high flow rates and offers Threaded, Subplate, and Flanged mounting options to suit diverse installation requirements.

Featured models include: A1Y-Ha32B, A1Y-Hb32B, A1Y-Ha32L, A1Y-Ha32F, and more.

Key Technical Advantages:

• Superior Pressure Retention: Utilizes a precision-ground poppet structure for “Zero Leakage” closure, guaranteeing long-term stability of the actuator’s position.

• Versatile Mounting Structures: Available in L-type (Threaded), F-type (Flanged), and B/P-type (Subplate) to perfectly integrate into various system architectures.

• High-Response Pilot Control: Optimized pilot ratios ensure smooth reverse actuation, minimizing system hydraulic shock.

• Heavy-Duty Durability: Engineered for construction machinery and large machine tools, featuring high-strength cast bodies to withstand continuous high pressure and vibration.

Detailed Specifications & Parameters:

• Core Series: A1Y / A2Y Pilot Operated Check Valve.

• Featured Model Matrix:

  • A1Y-Ha32B / A1Y-Hb32B (Subplate mounting, NG32, Type B)

  • A1Y-Ha32L / A1Y-Hb32L (Threaded connection, NG32, Type L)

  • A1Y-Ha32F / A1Y-Hb32F (Flanged connection, NG32, Type F)

• Core Technical Specs:

  • Nominal Size: NG32 (32mm).

  • Max Operating Pressure: Rated up to 31.5 MPa (315 Bar).

  • Max Flow Capacity: Supports high flow rates between 200 – 400 L/min.

  • Cracking Pressure: Typically 0.04-0.4 MPa.

  • Control Type: Available in External or Internal Pilot options.