HY160Y-RP Hengyuan Axial Piston Pump 160ml/r 315bar

Product Overview

The HY160Y-RP is a HENGYUAN HY Series open-circuit swashplate-type axial piston variable displacement pump with a nominal displacement of 160 ml/r, rated operating pressure of 315 bar (31.5 MPa), peak pressure capability of 400 bar (40 MPa), and maximum speed of 1500 rpm. At 1500 rpm, it delivers a maximum flow of 240 L/min, 126 kW maximum drive power, and 802 N·m maximum torque at 315 bar. Equipped with constant power control (Y control), the pump automatically adjusts displacement in response to system pressure, maintaining drive power below the set value at constant drive speed — the classic main pump configuration for heavy-duty industrial hydraulic systems including metal baling shears, presses, and scrap processing equipment.

The HY Series covers a wide displacement range from 10 to 320 ml/r, featuring an integrated pump body and housing design that eliminates the traditional CY pump scale plate for a more compact appearance and higher power-to-weight ratio. The series offers fast-responding constant power control with automatic power matching based on load, and multiple variable control options including constant pressure (P), energy-saving constant pressure with remote pressure control (P02), pressure and flow control (P03), and energy-saving high-low voltage compensation control (P04).

The HY160Y-RP features a mounting flange fully compatible with the CY14-1B series pump and SAE-standard port flanges, enabling rapid drop-in interchangeability with original CY pumps and same-size HY series products without modifying system installation interfaces or plumbing layouts. The pump is widely deployed in Y83W-4000L, Y83-5000, Y83W-6000 metal baling shears, as well as various press machines, marine auxiliary equipment, petroleum machinery, and metallurgical equipment hydraulic systems.

Every HY160Y-RP undergoes 100% simulated duty-cycle testing prior to shipment — covering pressure holding, flow output, control response, and internal leakage — ensuring reliable field performance under heavy-duty operating conditions.

Technical Specifications

• Model: HY160Y-RP

• Brand: HENGYUAN

• Series: HY Series open-circuit swashplate axial piston variable displacement pump

• Nominal Displacement: 160 ml/r

• Rated Operating Pressure: 315 bar (31.5 MPa)

• Peak Pressure: 400 bar (40 MPa)

• Clearance Working Pressure (10% cycle period): 350 bar

• Maximum Speed: 1500 rpm

• Maximum Flow at 1500 rpm: 240 L/min

• Maximum Drive Power at 315 bar: 126 kW

• Maximum Torque at 315 bar: 802 N·m

• Control Type: Y constant power control

• Direction of Rotation: R (clockwise, viewed from shaft end)

• Shaft Type: P (metric parallel with key)

• Mounting Flange: CY14-1B standard flange

• Port Flange: SAE standard port flange

• Housing Material: High-strength cast iron

• Inlet Absolute Pressure Range: 0.8–30 bar

• Case Drain Maximum Permissible Pressure: Must not exceed 2 bar absolute pressure

• Fluid Cleanliness Requirement: NAS Class 10 (or ISO 19/16)

• Recommended Fluid: L-HM32, 46, 68 low pour point anti-wear hydraulic oil

• Normal Operating Temperature: 15–65 ℃, ideal 50±4 ℃

• Kinematic Viscosity Range: 27–43 mm²/s

• Displacement Range Available: 10, 16, 18, 25, 28, 32, 40, 45, 55, 63, 71, 80, 90, 95, 100, 107, 125, 140, 160, 180, 200, 225, 250, 280, 300, 320 ml/r

• Control Options Available: M (fixed displacement), Y (constant power), MY (grading variables), B (electro-hydraulic proportional), S (manual), P (constant pressure), P01 (energy-saving constant pressure), P02 (constant pressure + remote pressure), P03 (constant pressure + load sensing), P04 (high-low voltage compensation)

HY Series Same-Family Displacement Reference (1500 rpm, 315 bar):

• HY100Y-RP: 100 ml/r, max flow 150 L/min, max power 78.8 kW, max torque 501 N·m

• HY125Y-RP: 125 ml/r, max flow 187.5 L/min, max power 98.4 kW, max torque 626 N·m

• HY160Y-RP: 160 ml/r, max flow 240 L/min, max power 126 kW, max torque 802 N·m

• HY180Y-RP: 180 ml/r, max flow 270 L/min, max power 142 kW, max torque 902 N·m

• HY200Y-RP: 200 ml/r, max flow 300 L/min, max power 157.5 kW, max torque 1003 N·m

• HY225Y-RP: 225 ml/r, max flow 337.5 L/min, max power 177.2 kW, max torque 1128 N·m

• HY250Y-RP: 250 ml/r, max flow 375 L/min, max power 196.9 kW, max torque 1253 N·m

• HY280Y-RP: 280 ml/r, max flow 420 L/min, max power 220.5 kW, max torque 1403 N·m

Data based on 315 bar rated conditions without considering mechanical and volumetric efficiency.

Key Technical Advantages

1. Constant Power Control — Intelligent Power Matching and Energy Savings

The HY160Y-RP employs Y constant power control, automatically adjusting pump displacement in response to system pressure through a hyperbolic pressure-displacement characteristic that maintains drive power below the set value at constant drive speed. When system pressure rises, pump displacement decreases; when pressure falls, displacement increases. This control characteristic enables automatic power matching to load, preventing motor overload while eliminating relief losses for significant energy savings. Constant power control delivers fast response, suitable for shears, balers, and similar applications with frequent load changes.

2. Wide Displacement Range — Flexible Selection Space

The HY Series covers a wide displacement range from 10 to 320 ml/r within a shared mounting flange system, providing flexible flow matching for system design. The HY160Y-RP features a mounting flange fully compatible with the CY14-1B series pump and SAE-standard port flanges, enabling rapid interchangeability with other same-series displacements. The pump also offers over ten control options including M, Y, MY, B, S, P, and P01–P04, meeting diverse requirements from simple fixed displacement to complex load sensing control.

3. Integrated Pump Body and Housing — Compact Structure and High Power Density

The HY Series features an integrated pump body and housing design that eliminates the traditional CY pump scale plate, resulting in a cleaner, more compact appearance and significantly improved power-to-weight ratio. The HY160Y-RP delivers 126 kW maximum drive power at 160 ml/r displacement and 315 bar, with power density leading among comparable products. The compact structural design provides exceptional adaptability within the limited installation space of metal baling shears and press machines, while the high-strength cast iron housing ensures long-term reliability under heavy-duty and vibration-prone conditions.

4. Excellent Suction Performance and High Reliability

The HY Series delivers excellent suction performance with an inlet absolute pressure range of 0.8–30 bar, combined with optimized valve plate flow passages ensuring adequate suction at high speeds to prevent cavitation damage. The swashplate axial piston design creates a hydrostatic oil film between shoe and swashplate for smooth operation, low noise, and long service life. Case drain maximum permissible pressure must not exceed 2 bar absolute and must not be higher than 0.5 bar above inlet pressure, ensuring case sealing operates within safe pressure limits.

5. Exceptional Field Interchangeability and Media Compatibility

The HY160Y-RP features a CY14-1B standard mounting flange, enabling drop-in interchangeability with original CY series pumps and same-size HY series products. The pump is compatible with mineral-based hydraulic oil and fire-resistant fluids. Recommended fluid is L-HM32, 46, or 68 low pour point anti-wear hydraulic oil with normal operating temperature of 15–65 ℃ and kinematic viscosity of 27–43 mm²/s. For equipment currently using CY14-1B series pumps, the HY160Y-RP installs directly without modifying system installation interfaces or plumbing layouts, dramatically reducing equipment downtime.

Application Areas

• Metal Baling Shears: Main hydraulic pump for Y83W-4000L, Y83-5000, Y83W-6000, Q83W-4000A2, Q83W-4000A3 models

• Press Machines: Four-column hydraulic presses and frame-type hydraulic press power sources

• Scrap Processing Equipment: Scrap baling machines, guillotine shears, and alligator shears hydraulic systems

• Marine Auxiliary Equipment: Anchor winches, steering gear, and deck machinery hydraulic systems

• Petroleum Machinery: Drilling equipment and workover rig hydraulic power units

• Metallurgical Equipment: Aluminum profile extrusion presses and forging equipment hydraulic stations

• Hydraulic Machinery: Shiplock gate hoist hydraulic systems

• Other Heavy-Duty Industrial Hydraulic Systems: Power units requiring 315 bar continuous working pressure and constant power control

The HY160Y-RP is ideally suited for heavy-duty industrial hydraulic systems requiring 315 bar continuous working pressure and displacements in the 140–180 ml/r range — the classic configuration for metal baling shear and large-tonnage press hydraulic power units.

Expert Maintenance Tips

1. Shaft Alignment and Coupling Requirements

Maintain concentricity between the pump shaft and drive shaft within 0.05 mm. Flexible couplings are strongly recommended to accommodate minor angular misalignment. Use appropriate lifting equipment during installation of the HY160Y-RP and never strike the shaft end. Tighten mounting flange bolts in diagonal sequence to the specified torque. The pump features a metric parallel keyed shaft (P shaft end); ensure sufficient keyway engagement length with the drive coupling.

2. Pre-Start Priming Procedure

Before initial startup, the pump must be slowly filled through the case drain port with clean hydraulic oil to ensure adequate lubrication, cooling, and sealing during startup. Start the pump in jog mode until the pump and piping are sufficiently filled and vented. After complete venting, run at low pressure for 5–10 minutes, check piping and component tightness, then gradually increase to rated pressure.

3. Constant Power Controller Commissioning

The HY160Y-RP constant power controller achieves power limitation through a pressure-displacement hyperbolic curve. During commissioning, verify that the power setting matches the drive source (electric motor or engine) power output. The control start pressure is set according to system requirements; adjustment must be performed with the pump at full displacement and low operating pressure. To change control mode (e.g., from constant power to constant pressure control), use the corresponding modular control cover for replacement.

4. Fluid Cleanliness and Filtration

Fluid cleanliness should be maintained within NAS Class 10 (or ISO 19/16) as cleanliness significantly affects pump service life. Use pressure line filters with a filtration ratio β10 ≥ 75 (per ISO 4572). Avoid suction filters, which increase suction resistance and cavitation risk; if essential, use with a vacuum switch monitor. Self-priming vacuum during cold start should not exceed 0.016 MPa. Install a breather filter with filtration accuracy ≤10 μm on the reservoir and regularly check oil level and fluid condition.

5. Case Drain Line Requirements

The case drain line should be independently routed to the reservoir, avoiding shared return lines. Case drain backpressure must not exceed 2 bar absolute and must not be higher than 0.5 bar above inlet pressure. Drain line diameter should be sufficiently large to ensure free drainage under cold-start high-viscosity conditions. Installing a pressure gauge or sensor on the drain line is recommended to monitor case pressure status. Before restarting after extended shutdown, manually rotate the shaft several turns to verify free rotation.