HY Series High Pressure Radial Piston Pump HY45Y / HY63Y-RP

Genlu Hydraulic stands at the absolute forefront as an elite-tier global developer and high-precision manufacturer of industrial heavy-duty ultra-high-pressure hydraulic pumps, heavy displacement piston blocks, and comprehensive fluid power manifolds for global B2B industrial material networks. The HY Series Ultra-High-Pressure Fixed/Variable Piston Pump Line—engineered to deliver a premium 100% drop-in interchangeable alternative to the definitive industrial press power standard, specifically matching traditional heavy-duty high-output legacy and modernized HY Series codes (such as HY45Y-RP, HY63Y-RP, HY80Y-RP, and HY100Y-RP, spanning the full volumetric displacement portfolio from HY10Y to HY100Y)—represents a sophisticated positive-displacement fluid-power solution. Commonly classified across international metalworking and mining infrastructures as high-pressure piston ram pumps or primary heavy-press power units, this series is custom-tailored for massive heavy-duty hydraulic processing presses, refractory forming plants, metal balers, and smelting mills operating under continuous extreme pressure cycles.

Within large industrial forging presses or extrusion machine circuits, primary fluid pumps run continuously at a massive 31.5 MPa nominal pressure threshold, routinely subjected to rapid decompression cycles, heavy fluid deceleration, and severe transient fluid shocks as the press transitions from slow pressing to rapid return strokes. Substandard aftermarket alternative pumps lacking consistent bimetallic matrix densities along the rotary block copper lining or suffering from insufficient surface hardness along the piston shoe interface inevitably face catastrophic mechanical failure—including shoe dislocation, internal barrel splitting, and complete valve plate galling. Genlu’s premium HY series replacement pumps are reverse-engineered to flawlessly duplicate the exact hydrostatic film equilibrium constants, specialized bimetallic clad bonding matrices, and high-tensile anti-fatigue cast iron casings detailed in standard heavy-duty engineering manuals. Whether validating circular/rectangular mounting flange positions, high-torque involute splines, straight-keyed driveshafts, or oversized SAE split flange fluid porting layouts, our pumps guarantee 100% mechanical and functional drop-in interchangeability. Prior to delivery, each assembly undergoes 100% Full-Simulation Condition Testing under continuous peak loads to measure volumetric tracing, rapid decompression response, and case leakage thresholds, ensuring immediate maximum tonnage capacity upon installation.

Technical Specifications 

• Product Pump Classification: HY Series Ultra-High-Pressure Industrial Heavy-Duty Piston Pump (Ram Pump Core)

• Core Representative Model Designation Codes: HY45Y-RP / HY63Y-RP / HY80Y-RP / HY100Y-RP

• Series Volumetric Coverage Matrix: Broad-scale replacement for HY10Y, HY16Y, HY25Y, HY28Y, HY32Y, HY40Y, HY45Y, HY55Y, HY63Y, HY71Y, HY80Y, HY90Y, and HY100Y platforms

• Geometric Displacement Boundaries: Spanning 10 $cc/rev$ to 100 $cc/rev$ (e.g., 45 $cc/rev$ for HY45Y, 63 $cc/rev$ for HY63Y)

• Maximum Continuous Rated Operating Pressure: 31.5 MPa (315 bar / 4568 PSI)

• Maximum Permissible Transient Intermittent Peak Pressure: Up to 40.0 MPa (400 bar / 5800 PSI) during intensive pressing spikes

• Permissible Operational Shaft Input Speed: 1500 RPM — 1800 RPM under continuous rating

• Drive Shaft Mechanical Configurations: High-torque standard involute splined shafting or industrial flat straight keyed shaft arrangements

• Main Fluid Porting Geometries: Suction port equipped with large-diameter split SAE 4-bolt flange pattern; discharge port engineered for heavy-duty high-pressure flange adaptation

• Control Mechanism Variations (Y Suffix Platforms): Standard high-rigidity fixed displacement output; adaptable to constant-power, constant-pressure, or pilot hydraulic proportional variable displacement regulators

• Total Pump Assembly Net Dry Weight: 45.0 kg — 95.0 kg (Scalable by displacement frame size; features heavy-walled thick-section alloy casting hulls)

Key Technical Advantages:

• Thick-Walled High-Tensile Alloy Nodular Iron Casing Block: Cast from high-elasticity nodular iron with a housing wall thickness increased by more than 20% compared to standard aftermarket pumps. This high-rigidity construction suppresses micro-elastic shell stretching during rapid 31.5 MPa cycling, eliminating the risk of structural micro-cracking and external casing weeping caused by fatigue.

• Heavy-Duty Bimetallic Piston Shoes with Balanced Hydrostatic Interface: The pistons are machined from high-frequency induction-hardened alloy steel, paired with shoes cast from high-tin bronze. By precisely calibrating the shoe face fluid damping, a 98% hydrostatic force balance is achieved at 31.5 MPa. This maintains a resilient 2–3 $\mu m$ lubrication layer, preventing dry-friction scoring or shoe detachment.

• 9-Piston Odd-Symmetric Array for Low Pressure Pulsation: Built on a symmetric 9-piston rotating group design. Compared to even-piston setups, the odd-numbered configuration provides a smoother flow overlap during fluid displacement, keeping discharge pressure ripples under $\le 2.5\%$. This minimizes structural line vibration and extends the service life of downstream system valving.

• CFD-Optimized Anti-Cavitation Valve Plate with Smooth Flow Transitions: The valve plate surface undergoes nitriding treatment and features fluid channels optimized via Computational Fluid Dynamics (CFD). The gradual decompression grooves ensure a smooth transition as the piston cavities alternate between ports, suppressing cavitation pitting and keeping volumetric efficiency above 95% even when oil temperatures reach 65°C.

Application Areas:

• Heavy Industrial Hydraulic Presses and Forging Equipment: Primary high-pressure power supply for four-column stamping presses, refractory brick forming machines, and heavy metal scrap balers.

• Metallurgical Smelting Mills and Rolling Mill Automation: Supplying ultra-high-pressure power for Automatic Gauge Control (AGC) roll-bending loops and blast furnace top-cover lifting cylinders.

• High-Pressure Fluid Test Stands and Synchronous Lifting Systems: Delivering reliable fluid power for hydrostatic pipe burst test configurations and multi-point synchronous heavy bridge lifting rigs.

Expert Maintenance Tips:

• Mandatory Pre-Lubrication and Manual Shaft Rotation Prior to First Run: Because the internal rotating kit of the HY series is machined to tight clearances, dry operation will cause immediate damage. Before commissioning or after a system overhaul, fill the pump housing with clean system oil via the highest drain port (e.g., at least 2.0L for HY63Y). Once filled, turn the drive coupling manually 3–5 times to ensure the internal components are fully coated before starting the motor.

• Enforced Flooded Suction Installation Criteria for High-Pressure Circuits: For displacements larger than HY45Y running at a continuous 31.5 MPa, a flooded suction setup with the oil reservoir positioned above the pump inlet is highly recommended (or install a low-pressure charge pump supplying 0.1–0.2 MPa). Avoid high suction lifts exceeding 0.5 meters, as the resulting fluid velocity will cause cavitation and destroy the piston shoes.

• Strict Fluid Cleanliness Requirements and Case Drain Backpressure Limits: Under 31.5 MPa of pressure, micro-particles act as high-velocity abrasives that erode internal tolerances. The hydraulic fluid must be continuously filtered to meet NAS Grade 7 (ISO 18/15) or cleaner. Additionally, route the independent case drain line directly to the reservoir with an absolute backpressure limit under 0.1 MPa to prevent shaft seal blowout or hydrostatic balance failure.