Product Overview
The SAP-047R-V-DL4-L35-SOS-000, SAP056R-N-DL4-L35-SOS-000, and SAP-064R-N-DL4-L35-SOS-000 are SUNFAB (by HAWE) SAP series lightweight fixed-displacement axial piston pumps. With displacements covering 12 to 108 cm³/rev and a maximum working pressure of 400 bar, the SAP series is engineered for demanding mobile hydraulic applications. The three models feature geometric displacements of 47.1 cm³/rev, 56.7 cm³/rev, and 63.6 cm³/rev respectively, utilizing a bent-axis axial piston design with fixed displacement, meeting high market demands for flow performance, pressure, efficiency, and compact installation dimensions.
Model code breakdown (using SAP-047R-V-DL4-L35-SOS-000 as example): SAP denotes the Sunfab aluminum housing pump series; 047 indicates 47.1 cm³/rev displacement; R indicates right-hand rotation (viewed from drive end); V denotes HNBR shaft seal; DL4 indicates DIN 4-hole mounting flange (ISO 7653D); L35 indicates DIN 5462/ISO 14 splined shaft; SOS indicates O-ring seal + double shaft seal; 000 denotes standard configuration.
Each unit is manufactured to exact SUNFAB specifications, with mounting flange, drive shaft, port locations, and interfaces fully dimensionally matched for drop-in interchangeability. Every pump undergoes 100% simulated load testing on our test bench, validating flow characteristics, volumetric efficiency, and operational stability across the 350 bar continuous and 400 bar peak pressure ranges before shipment.
Technical Specifications
SAP-047R-V-DL4-L35-SOS-000 Core Specifications
Model: SAP-047R-V-DL4-L35-SOS-000
Series: SUNFAB SAP Series
Geometric Displacement: 47.1 cm³/rev (SAE C flange)
Theoretical Flow: 24 L/min (500 rpm), 47 L/min (1000 rpm), 71 L/min (1500 rpm)
Max Continuous Speed: 1900 rpm
Max Intermittent Speed: 2500 rpm
Max Working Pressure: 400 bar
Continuous Working Pressure: 350 bar
Rotation Direction: Right-hand (R)
Shaft Seal: HNBR (V)
Mounting Flange: DIN 4-hole (ISO 7653D)
Drive Shaft: DIN 5462 / ISO 14 splined shaft
Seal Configuration: O-ring + double shaft seal
Weight (approx.): 10.4 kg (SAE C flange)
SAP056R-N-DL4-L35-SOS-000 Core Specifications
Model: SAP056R-N-DL4-L35-SOS-000
Series: SUNFAB SAP Series
Geometric Displacement: 56.7 cm³/rev (SAE C flange)
Theoretical Flow: 28 L/min (500 rpm), 57 L/min (1000 rpm), 85 L/min (1500 rpm)
Max Continuous Speed: 1900 rpm
Max Intermittent Speed: 2500 rpm
Max Working Pressure: 400 bar
Continuous Working Pressure: 350 bar
Rotation Direction: Right-hand (R)
Shaft Seal: Nitrile (N)
Mounting Flange: DIN 4-hole (ISO 7653D)
Drive Shaft: DIN 5462 / ISO 14 splined shaft
Seal Configuration: O-ring + double shaft seal
Weight (approx.): 9.9 kg (SAE C flange)
SAP-064R-N-DL4-L35-SOS-000 Core Specifications
Model: SAP-064R-N-DL4-L35-SOS-000
Series: SUNFAB SAP Series
Geometric Displacement: 63.6 cm³/rev (SAE C flange)
Theoretical Flow: 32 L/min (500 rpm), 64 L/min (1000 rpm), 95 L/min (1500 rpm)
Max Continuous Speed: 1900 rpm
Max Intermittent Speed: 2500 rpm
Max Working Pressure: 400 bar
Continuous Working Pressure: 350 bar
Rotation Direction: Right-hand (R)
Shaft Seal: Nitrile (N)
Mounting Flange: DIN 4-hole (ISO 7653D)
Drive Shaft: DIN 5462 / ISO 14 splined shaft
Seal Configuration: O-ring + double shaft seal
Weight (approx.): 9.6 kg (SAE C flange)
SUNFAB SAP Series Full Displacement Range
SAP 012: 12.6 cm³/rev, max pressure 400 bar, continuous speed 2300 rpm
SAP 017: 17.0 cm³/rev, max pressure 400 bar, continuous speed 2300 rpm
SAP 025: 25.4 cm³/rev, max pressure 400 bar, continuous speed 2300 rpm
SAP 034: 34.2 cm³/rev, max pressure 400 bar, continuous speed 2300 rpm
SAP 040: 41.2 cm³/rev, max pressure 400 bar, continuous speed 1900 rpm
SAP 047: 47.1 cm³/rev, max pressure 400 bar, continuous speed 1900 rpm
SAP 056: 56.7 cm³/rev, max pressure 400 bar, continuous speed 1900 rpm
SAP 064: 63.6 cm³/rev, max pressure 350 bar (SAE B) / 400 bar (SAE C), continuous speed 1900 rpm
SAP 084: 83.6 cm³/rev, max pressure 400 bar, continuous speed 1600 rpm
SAP 108: 108.0 cm³/rev, max pressure 400 bar, continuous speed 1600 rpm
Data referenced from SUNFAB SAP series official technical documentation. The series features a lightweight metal casing design with smooth operation over the entire speed range, long life through high demands on material selection such as bearings and seals, and a corrosion-free light metal housing that reduces heat generation through better heat dissipation.
Key Technical Advantages
1. Lightweight Aluminum Housing with Compact Installation Design
The SAP series features a lightweight metal (aluminum) housing design that significantly reduces weight compared to conventional cast iron pump bodies. For example, the SAP-064R SAE C flange model weighs only approximately 9.6 kg. The pump can be mounted directly on the power take-off (PTO) or on a frame bracket via an intermediate shaft, providing flexible installation options that meet the strict space and weight requirements of mobile hydraulic systems. The corrosion-free light metal housing also offers better heat dissipation, effectively dissipating operating heat through the housing and reducing system thermal load.
2. High-Strength Materials with Precision Surface Treatment
The SAP series utilizes high-strength GGG60 ductile iron pressure-bearing housings, with piston pairs treated by plasma nitriding to achieve surface hardness of up to HV900. The valve plate employs a copper alloy + polymer composite material, ensuring stable operation under various working conditions with excellent power-to-weight ratio and extended service life. All sealing surfaces are equipped with O-rings to eliminate external leakage risk. High-standard bearings and seals are selected, making it an industry-leading hydraulic product with all-steel pressure-bearing components and a compact, robust overall structure.
3. Bent-Axis Structure with High Power Density Output
The SAP series employs a bent-axis axial piston structure, varying the piston stroke by changing the swashplate angle for precise displacement control. The series is renowned for its high power density. At 1900 rpm continuous speed and 350 bar continuous working pressure, the SAP-064R delivers 95 L/min flow. The high power density design enables it to meet the demands of large-flow hydraulic systems within a compact installation space, making it suitable for mobile hydraulic applications requiring high power output.
4. Premium Sealing System and Reliability Design
All three models feature SOS seal configuration — O-ring seal + double shaft seal design — providing reliable sealing performance under high-pressure conditions and suitability for continuous industrial operation. The SAP-047R uses HNBR (V) shaft seal with excellent high-temperature and oil resistance; the SAP056R and SAP-064R use Nitrile (N) shaft seal with good oil resistance and wear resistance. The DL4 mounting flange complies with ISO 7653D standards, and the L35 splined shaft complies with DIN 5462 / ISO 14 standards, ensuring complete interchangeability with the original pump.
5. Full Series Displacement Coverage with Flexible Adaptation
The SAP series covers a displacement range from 12.6 cm³/rev to 108 cm³/rev, with 10 standard sizes providing flexible displacement selection for system design. Pumps of different displacements within the same series share identical mounting interfaces and control methods, facilitating rapid replacement during system upgrades or displacement adjustments without redesigning piping and brackets. Additionally, the SAP series offers a DIN Optimised quiet version with lower noise and reduced system pulsation, suitable for electric motor drive applications with strict noise requirements.
Application Areas
The SAP-047R-V-DL4-L35-SOS-000, SAP056R-N-DL4-L35-SOS-000, and SAP-064R-N-DL4-L35-SOS-000 are widely deployed in the following machinery and systems:
Construction Equipment: Excavator hydraulic systems, wheel loader working circuits, bulldozer hydraulic drives
Mining Equipment: Underground LHD transmission systems, drill rig hydraulic circuits
Lifting & Transport Equipment: Truck crane hydraulic systems, loader crane hydraulic drives
Marine & Offshore Engineering: Deck machinery hydraulic power, marine hydraulic systems
Industrial Hydraulic Power Units: Steel plants, power plants, aluminum plants, cement machinery hydraulic power units
Mobile Hydraulic Systems: Various mobile machinery requiring high-pressure fixed-displacement hydraulic power
Expert Maintenance Tips
Pre-Installation Checks:
Verify pump rotation direction is right-hand (viewed from drive end, R). Reverse operation is not permitted.
Fill the pump housing with clean hydraulic oil (ISO VG46 or VG32 recommended) before installation to prevent dry-start damage to the piston pairs and valve plate.
Check mounting flange fit with the drive end. The DL4 flange should comply with ISO 7653D standards, ensuring accurate 4-hole positioning.
Verify splined shaft (L35, DIN 5462 / ISO 14) fit with the drive-end spline sleeve. Clearances should meet standard requirements; do not force installation.
Hydraulic Fluid and Filtration:
Use ISO VG46 anti-wear hydraulic oil with a cleanliness level of NAS Class 9 or better.
Maintain system filtration at ISO 16/13 cleanliness level or better.
Replace all hydraulic fluid after the first 100 hours, then every 2000 hours or annually.
Operational Monitoring:
Continuous working pressure must not exceed 350 bar; short-term peak pressure must not exceed 400 bar.
Pump housing temperature must not exceed 90°C. If exceeded, inspect the cooling system and circuit leakage.
Periodically inspect O-rings and double shaft seals for leakage and replace seals as necessary.
Every 1000 hours, check splined shaft wear and replace coupling or drive shaft if wear exceeds specifications.
