Product Overview
The V15A1R10XA is a YEOSHE V Series swashplate-type axial variable displacement piston pump with a nominal displacement of 15 mL/r, rated operating pressure of 175 bar (17.5 MPa), peak pressure capability of 250 bar (25 MPa), speed range of 500–1800 rpm (commonly 1500 rpm), output flow of approximately 22.5 L/min at 1500 rpm, drive power of approximately 6.8 kW at 1500 rpm and 175 bar, and weight of approximately 12–13 kg. The pump features A-type pressure compensation control (constant pressure variable) with a low-pressure adjustment range of 8–70 bar (0.8–7 MPa), suitable for low-pressure holding and low-pressure high-speed conditions — the classic power source for injection molding machines, machine tools, and forging machinery in small-to-medium power industrial hydraulic systems.
The V Series is engineered with special alloy materials, precision manufacturing, and an optimized swashplate angle adjustment mechanism, maintaining low noise levels (typically 62 dB) across the full pressure range with volumetric efficiency ≥ 92%. The series covers a displacement range of 8–70 cc/rev, offering multiple displacement ratings and control options (A/B/C/CG/D/E/EG/F/FG/G/H/HL/HJ/HK/HQ, etc.) within a shared mounting flange system, meeting diverse system requirements from simple constant pressure to load sensing and constant power control. The V15A1R10XA features an SAE-A two-hole mounting flange (locating circle φ50.8 mm), G1″ (or 1″ NPT) inlet, G3/4″ (or 3/4″ NPT) outlet, enabling rapid drop-in interchangeability with original YEOSHE/Daikin same-specification products.
The companion models — V23A3R10X (23 cc/rev, max 250 kgf/cm², weight approx. 20 kg), V38A2RS10X (37.8 cc/rev, rated 25 MPa, operating temperature 30–90 ℃), V42A4R10X (42 cc/rev, rated approx. 25 MPa), V50A3R10X (51.5 cc/rev, medium pressure constant pressure 20–140 bar, weight approx. 55 kg), and V70A3R10X (69.7 cc/rev, max 21 MPa, weight approx. 56 kg) — form the complete V Series product matrix, providing system integration solutions for different flow and pressure requirements.
Every V15A1R10XA undergoes 100% simulated duty-cycle testing prior to shipment — covering pressure holding, flow output, control response, and internal leakage — ensuring complete drop-in interchangeability with original YEOSHE pumps without installation or plumbing modifications.
Technical Specifications
V15A1R10XA Main Model Specifications:
Model: V15A1R10XA
Brand: YEOSHE
Series: V Series open-circuit swashplate axial variable piston pump
Pump Type: Swashplate axial variable displacement piston pump
Nominal Displacement: 15 mL/r (15 cc/rev)
Rated Operating Pressure: 175 bar (17.5 MPa)
Peak Pressure: 250 bar (25 MPa)
Speed Range: 500–1800 rpm (commonly 1500 rpm)
Flow at 1500 rpm: Approx. 22.5 L/min
Flow at 1800 rpm: Approx. 27.0 L/min
Drive Power at 1500 rpm, 175 bar: Approx. 6.8 kW
Control Type: A-type pressure compensation (constant pressure variable)
Pressure Adjustment Range: 8–70 bar (low pressure grade)
Direction of Rotation: R (clockwise, viewed from shaft end)
Mounting Flange: SAE-A two-hole flange (locating circle φ50.8 mm)
Shaft Type: φ22.2 mm keyed shaft (key 6.3×6.3)
Inlet Port: G1″ (or 1″ NPT)
Outlet Port: G3/4″ (or 3/4″ NPT)
Seals: NBR (Nitrile)
Housing Material: Cast iron
Weight: Approx. 12–13 kg
Volumetric Efficiency: ≥ 92%
Noise Level: Typically 62 dB(A)
Fluid Compatibility: Mineral oil (standard), optional water-glycol / phosphate ester
Operating Temperature Range: -10 to +60 ℃
V Series Same-Family Displacement Reference (1500 rpm, rated conditions):
V15 (15A series): 15 cc/rev, 175 bar rated, 250 bar peak, max 1800 rpm, flow at 1500 rpm 22.5 L/min, flow at 1800 rpm 27.0 L/min, weight approx. 13 kg
V18: 17.8 cc/rev, 175 bar rated, 250 bar peak, max 1800 rpm, flow at 1500 rpm 26.7 L/min, flow at 1800 rpm 32.0 L/min, weight approx. 13 kg
V23 (23A3R10X): 23 cc/rev, max 250 kgf/cm², max 1800 rpm, weight approx. 20 kg
V38 (38A2RS10X): 37.8 cc/rev, rated 25 MPa, flow at 1500 rpm 56.7 L/min, flow at 1800 rpm 68.0 L/min, weight approx. 26 kg
V42 (42A4R10X): 42 cc/rev, rated approx. 25 MPa, flow at 1500 rpm 63.0 L/min, flow at 1800 rpm 76.0 L/min, weight approx. 26 kg
V50 (50A3R10X): 51.5 cc/rev, medium pressure constant pressure 20–140 bar, flow at 1500 rpm 77.2 L/min, flow at 1800 rpm 92.7 L/min, weight approx. 55 kg
V70 (70A3R10X): 69.7 cc/rev, max 21 MPa, flow at 1500 rpm 104.5 L/min, flow at 1800 rpm 125.4 L/min, weight approx. 56 kg
Key Technical Advantages
1. Swashplate Variable Design — Precise Flow Control and Energy Savings
The V15A1R10XA employs YEOSHE’s proprietary swashplate angle adjustment mechanism, achieving stepless displacement variation through automatic swashplate inclination adjustment. A-type pressure compensation control (constant pressure variable) automatically reduces displacement to only leakage flow when system pressure reaches the set point, achieving constant pressure holding and energy-efficient operation; when system pressure drops, the pump automatically increases displacement to restore flow output. The low-pressure grade 8–70 bar setting range is particularly suitable for injection molding machine low-pressure holding and low-pressure high-speed clamping conditions, delivering over 40% energy savings compared to fixed displacement pump systems, with reduced power loss and oil temperature rise.
2. Low Noise Operation Across Full Pressure Range — 62 dB(A) Quiet Performance
The V Series employs special alloy materials and optimized internal flow passage design, maintaining low noise performance across the full pressure range, with the V15A1R10XA achieving a typical noise level of only 62 dB(A). This is achieved through precision-machined valve plate flow passages, optimized piston kinematics, and a rigid compact housing structure, reducing airborne noise emissions by approximately 6 dB(A) compared to conventional designs. For injection molding workshops, precision machine tools, and other indoor industrial environments with stringent acoustic requirements, this pump offers significant acoustic advantages.
3. Compact Lightweight Design — 12 kg Class-Leading Power Density
The V15A1R10XA weighs only approximately 12–13 kg at 15 cc/rev displacement, with a compact structural design providing exceptional adaptability within the limited installation space of industrial hydraulic power units. The pump features a cast iron housing combining structural rigidity with lightweight characteristics. The SAE-A two-hole mounting flange (locating circle φ50.8 mm) and φ22.2 mm keyed shaft are standard configurations, enabling simple installation and direct coupling with electric motors.
4. High Volumetric Efficiency and Broad Media Compatibility
The V Series achieves volumetric efficiency ≥ 92%, leading among comparable medium-low pressure piston pumps. Optimized spherical porting design and precision-machined piston assemblies effectively reduce internal leakage, ensuring stable flow output over extended operation. The pump is compatible with mineral-based hydraulic oil (standard), with optional water-glycol and phosphate ester media, and NBR seals suitable for standard industrial hydraulic systems.
5. Exceptional Field Interchangeability and Series Selection
The V15A1R10XA features mounting flange, shaft specifications, and port layouts conforming to YEOSHE V Series standards, enabling drop-in interchangeability with other V15 models (V15A2R10X, V15A3R10X, V15A4R10X, etc.). The V Series covers a wide displacement range of 8–70 cc/rev, offering over 15 control type options (A/B/C/CG/D/E/EG/F/FG/G/H/HL/HJ/HK/HQ) within a shared mounting flange system, meeting diverse requirements from simple constant pressure to complex load sensing control — providing flexible selection space for system design and equipment maintenance.
Application Areas
Small-to-Medium Injection Molding Machines: Power source for clamping, injection, holding pressure, ejector, and core pulling actions; low-pressure constant pressure (8–70 bar) suitable for holding pressure and low-pressure high-speed conditions
Machine Tools and Tool Machines: Hydraulic systems for CNC lathes, machining centers, and grinding machines — clamping, feed, and tailstock drive
Forging Machinery: Intermittent heavy-duty power source for presses under 100 tons, bending machines, hydraulic presses, and riveting machines
Plastic Forming Machines: Hydraulic power units for small injection molding and blow molding machines
Industrial Hydraulic Power Units: Non-standard equipment, automated production lines, and metallurgical/mining machinery pump stations
Construction Machinery: Auxiliary hydraulic circuits for small excavators, loaders, and forklifts
The V15A1R10XA is ideally suited for small-to-medium power industrial hydraulic systems requiring 175 bar continuous working pressure and displacements in the 12–18 cc/rev range — the classic configuration for small-to-medium injection molding machines and machine tool 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. The V15A1R10XA features an SAE-A two-hole flange and φ22.2 mm keyed shaft — never strike the shaft end during installation to avoid damaging internal seals and bearings. The pump should be installed with the outlet port facing upward, maintaining line backpressure below 2 bar with independent return to the reservoir.
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. Pressure Compensator Setup and System Commissioning
The A-type pressure compensator setting should be at least 10–15 bar below the system relief valve setting. The V15A1R10XA pressure adjustment range is 8–70 bar (low pressure grade). During commissioning, first turn the pressure setting screw to the lowest pressure position, then gradually increase to the target pressure. Adjustment must be performed with the pump at full displacement and low operating pressure to avoid system pressure oscillation.
4. Fluid Cleanliness and Temperature Control
Fluid cleanliness of NAS Class 9 (ISO 18/16/13) or better is recommended. Use pressure line filters with 10 μm filtration accuracy. The V Series operates with oil temperature of -10 to +60 ℃; ISO VG32 or VG46 anti-wear hydraulic oil is recommended. Under maximum pressure operating conditions, each cycle time should not exceed 6 seconds.
5. Restart Procedure After Extended Shutdown
If the pump has been idle for more than 30 days, manually rotate the shaft several turns to verify free rotation before restarting. Check for abnormal leakage at the case drain port. After startup, operate at low pressure for 10–15 minutes until oil temperature reaches normal operating range before applying full load.
