Parameter Specification of YUKEN Piston Pump A16-FR04BK-32

1. Model Interpretation

• A16: Series identifier + geometric displacement, indicating the “A” series piston pump with a geometric displacement of 16 cm³/rev (0.98 cu.in./rev)
• F: Mounting type, flange mounting
• R: Rotation direction, clockwise rotation (viewed from the shaft end, standard configuration)
• 04: Control mode, remote pressure control (external pressure signal control)
• B: Pressure adjustment range, 3.5 – 21 MPa (36 – 305 psi)
• K: Shaft type, keyed shaft
• 32: Design number, corresponding to the standard design specification of the pump

2. Core Technical Parameters

3. Installation & Structural Parameters

• Mounting Type: Flange mounting (code “F”)
• Rotation Direction: Clockwise (viewed from the shaft end, code “R”), standard configuration
• Shaft Type: Keyed shaft (code “K”)
• Approximate Weight (Flange Mounting): 12 kg (26.5 lbs)
• Port Specification: The suction port (S) has an inner diameter of 25 mm, and the discharge port (P) has an inner diameter of 18 mm; the port connection complies with SAE J518 standard (4 bolts)
• Drain Pipe Requirement: A separate drain pipe should be installed for each side of the pump, with a pipe inner diameter of not less than 10 mm (3/8 inch, inner diameter ≥ 8 mm)

4. Fluid & Environmental Parameters

• Applicable Fluid: Petroleum-based hydraulic oil equivalent to ISO VG 32 or ISO VG 46
• Fluid Viscosity Range: 20 – 400 mm²/s (20 – 400 cSt)
• Operating Temperature Range: 0 – 60 °C
• Fluid Contamination Control: The contamination level should be within NAS 10
• Suction Pressure Requirement: -16.7 kPa ~ 50 kPa (-125 mmHg ~ +0.5 kgf/cm²)

5. Performance Characteristics

• Efficiency: At 16 MPa (2320 psi) and 1800 r/min, the volumetric efficiency exceeds 98% and the overall efficiency exceeds 90%.
• Step Response: The step response time (0 to maximum flow) is 5 ms, and the hysteresis is 2% or less (depending on the circuit and operating conditions).
• Noise Performance: Advanced structural design ensures low noise operation, providing a quiet working environment.
• Energy Saving: High overall efficiency effectively reduces power loss, minimizes oil temperature rise, and lowers the requirement for fuel tank capacity.

6. Safety & Usage Notes

• When setting the pressure, ensure that the full cut-off pressure does not exceed the maximum intermittent pressure (28 MPa).
• If the pump is operated above the rated pressure (25 MPa), the operating conditions are restricted: the intermittent time at maximum flow should not exceed 1/5 of one cycle time and 6 seconds simultaneously.
• Avoid applying bending or radial loads to the pump shaft; the TIR of the drive shaft should not exceed 0.1 mm, and the angle deviation should not exceed 0.2°.
• Ensure complete air bleeding of the pump and pipeline to avoid vibration caused by air entrapment.
• When the pump is installed above the oil level, a foot valve should be installed in the suction pipeline, and the height from the suction port to the oil level should not exceed 1 m.