YUKEN “A3H” Series High pressure variable piston pump
YUKEN “A3H” series high pressure variable piston pump：
A3H16、A3H37、A3H56、A3H71、A3H100、A3H145、A3H180
E-mail: hyd-sales2009@outlook.com
YUKEN Variable Displacement Piston Pump A3H Series Specifications & Model Explanation
1. Overview
2. Core Technical Data (A3H Series)
|
Parameter
|
A3H16 Series
|
A3H37 Series
|
A3H56 Series
|
A3H107 Series
|
|
Geometric Displacement (Vg)
|
16 cm³/rev
|
37 cm³/rev
|
56 cm³/rev
|
107 cm³/rev
|
|
Speed Range
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Min: 1000 min⁻¹; Max: 2000 min⁻¹
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Min: 800 min⁻¹; Max: 1800 min⁻¹
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Min: 800 min⁻¹; Max: 1800 min⁻¹
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Min: 600 min⁻¹; Max: 1500 min⁻¹
|
|
Continuous Operating Pressure (pN)
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315 bar
|
315 bar
|
315 bar
|
315 bar
|
|
Intermittent Operating Pressure (pmax)
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400 bar (10% duty cycle, 10s)
|
400 bar (10% duty cycle, 10s)
|
400 bar (10% duty cycle, 10s)
|
400 bar (10% duty cycle, 10s)
|
|
Flow Rate (1500 min⁻¹, 10 bar)
|
24 l/min
|
55.5 l/min
|
84 l/min
|
160.5 l/min
|
|
Minimum Drive Power (≈1 bar)
|
1.2 kW
|
2.8 kW
|
4.2 kW
|
8.0 kW
|
|
Weight
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18 kg
|
32 kg
|
48 kg
|
75 kg
|
|
Inlet Pressure
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0.5 – 2.0 bar
|
0.5 – 2.0 bar
|
0.5 – 2.0 bar
|
0.8 – 2.5 bar
|
3. Key Features
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Stepless Displacement Adjustment: Supports 0 – 100% stepless displacement adjustment through multiple control modes, effectively adapting to dynamic flow and pressure changes of hydraulic systems, reducing energy loss.
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High Pressure & Efficiency: Precision-machined axial swashplate and piston-cylinder structure ensure high volumetric efficiency (≥94%) and mechanical efficiency (≥89%) even under long-term high-pressure operation.
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Diversified Control Modes: Available in manual control (M), hydraulic control (H), electro-hydraulic proportional control (EP), and load-sensitive control (LS), meeting different automation and control requirements of industrial systems.
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Long Service Life: Adopts wear-resistant alloy steel for piston and cylinder block, combined with optimized oil distribution and lubrication structure, ensuring stable operation and long service life in harsh industrial environments.
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Low Noise Operation: Special damping and flow distribution design effectively reduces operating noise, with noise level controlled at 68 – 82 dB(A) (varies by size and operating speed).
4. Hydraulic Fluid & Environmental Requirements
|
Parameter
|
Specification
|
|
Permissible Fluids
|
HL/HLP mineral oil (DIN 51524); Anti-wear hydraulic oil (ISO VG 32/46/68); Fire-resistant hydraulic oil (HFC/HEES)
|
|
Operating Temperature
|
-10 °C to +80 °C (short-term up to +100 °C)
|
|
Ambient Temperature
|
-15 °C to +65 °C
|
|
Viscosity Range
|
15 – 380 mm²/s; Maximum starting viscosity: 1500 mm²/s
|
|
Fluid Cleanliness
|
ISO 4406 (c) 18/16/13 (recommended); Minimum ISO 4406 (c) 20/18/15
|
5. Model Code Structure (A3H Series)
5.1 Standard Ordering Code
5.2 Code Segment Explanation
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Segment
|
Code
|
Meaning
|
|
Series
|
A3H
|
Axial piston pump, variable displacement, swashplate design, high-pressure industrial type
|
|
Displacement
|
16, 22, 37, 56, 80, 107, 160
|
Geometric displacement (cm³/rev), e.g., 56 = 56 cm³/rev
|
|
Control Mode
|
M/H/EP/LS
|
M: Manual control; H: Hydraulic control; EP: Electro-hydraulic proportional control; LS: Load-sensitive control
|
|
Mounting Type
|
F/B
|
F: Flange mounting (ISO 3019-2); B: Foot mounting
|
|
Shaft Type
|
K/S
|
K: Parallel keyed shaft (ISO 3019-2); S: Splined shaft (SAE J744)
|
|
Seal Type
|
N/V
|
N: Nitrile rubber (NBR) seal; V: Fluorocarbon rubber (FKM) seal
|
6. Key Dimensions (Unit: mm, Typical Models)
6.1 A3H56
|
Dimension
|
Value (±0.5)
|
Description
|
|
a
|
235
|
Overall length (flange to shaft end)
|
|
b
|
155
|
Flange width
|
|
d
|
40
|
Shaft diameter (K type)
|
|
M
|
M14×1.5
|
Mounting thread
|
6.2 A3H107
|
Dimension
|
Value (±0.5)
|
Description
|
|
a
|
310
|
Overall length (flange to shaft end)
|
|
b
|
190
|
Flange width
|
|
d
|
55
|
Shaft diameter (K type)
|
|
M
|
M16×1.5
|
Mounting thread
|
7. Material Specifications
|
Component
|
Material
|
|
Housing & Flange
|
High-strength cast iron (FC250) for durability and pressure resistance
|
|
Cylinder Block & Piston
|
High-carbon alloy steel (SCM440), heat-treated for wear resistance
|
|
Swashplate & Valve Plate
|
Wear-resistant alloy steel with tungsten carbide coating
|
|
Shaft
|
Chrome-molybdenum alloy steel (SNCM439), quenched and tempered for high strength
|
|
Bearings
|
High-precision roller bearings and steel-backed copper-lead alloy bushes
|
|
Seals
|
NBR/FKM rubber (depending on seal type), oil-resistant and high-temperature resistant
|
8. Applications
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Industrial Applications: Plastic injection molding machines, hydraulic presses, metal forming equipment, machine tools (CNC lathes, milling machines), and high-pressure hydraulic power units requiring variable flow control.
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Special Applications: Heavy-duty hydraulic systems in metallurgy, mining, and engineering machinery auxiliary systems, where high pressure and stable performance are required.
9. Important Notes
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Displacement adjustment should be performed under no-load or low-load conditions to avoid excessive mechanical stress and damage to internal components.
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Ensure precise alignment between the pump drive shaft and the motor shaft (coaxiality ≤0.15 mm) to prevent shaft deformation and bearing wear.
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Install a pressure relief valve and high-precision filter in the hydraulic system to protect the pump from overpressure and contamination.
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Regular maintenance is required: replace hydraulic oil every 1500 – 2000 operating hours, and clean or replace the oil filter every 500 operating hours.
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Avoid long-term operation at low speed (below minimum speed) and high pressure, as this will reduce efficiency and shorten service life.
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Check the seal for leakage regularly; replace the seal immediately if leakage is found to prevent oil loss and system contamination.
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Process steps：
Customer inquiry: Customers will make inquiries before placing an order to understand product details and communication needs.
Quotation: According to customer needs, provide a formal quotation, including the name, model, quantity, delivery time, payment method, etc. of the goods.
Order confirmation: After the customer confirms the quotation, a formal purchase order will be placed.
Confirm the delivery time: communicate the delivery time with the production department, inform the factory of the order details, and arrange the production plan.
Sign an export contract: After the two parties confirm that it is correct, sign an export contract to establish a trade relationship.
Implement the letter of credit (if applicable): If the payment method of the letter of credit is used, the customer needs to be urged to issue the certificate and review the contents of the letter of credit.
Export stocking: According to the requirements of the contract and the letter of credit, arrange production, purchase raw materials and packaging, and prepare the goods.
Chartering and booking: Contact the freight forwarder to make a booking and arrange the transportation of goods.
Export inspection: Apply to the quality inspection department for export commodity inspection and provide relevant documents.
Apply for a write-off slip: apply for a write-off slip from the foreign exchange management department for subsequent foreign exchange write-off.
Export declaration: Declare exports to the customs and provide documents such as power of attorney for customs declaration, customs declaration form for export goods, commercial invoice, packing list, etc.
