Bokin Electro-Hydraulic Technology (Foshan) Co., Ltd. is one of the leading manufacturers and suppliers of hydraulic axial piston pump a4vso250 drg remote pressure control in China. If you're going to wholesale bulk durable hydraulic axial piston pump a4vso250 drg remote pressure control made in China, welcome to get pricelist from our factory. All customized products are with high quality and competitive price.
Product Parameters
▶ Robust high-pressure pump for industrial applications
▶ Size 250
▶ Nominal pressure 350 bar
▶ Maximum pressure 400 bar
▶ Open circuit
Features
▶ Variable displacement pump with axial piston rotary group of swashplate design for hydrostatic drives in open circuit
▶ Flow is proportional to the drive speed and displacement.
▶ The flow can be continuously changed by adjusting the swashplate.
▶ Excellent suction characteristics
▶ Low noise level
▶ With pre-compression volume for pressure pulsation reduction
▶ Nominal pressure 380 bar / maximum pressure 420 bar for selected control devices with port plate 36.
▶ Long service life
▶ Modular design
▶ Variable through drive options
▶ Optical swivel angle indicator
▶ Any installation position possible
▶ Suitable for variable-speed drives
▶ HF operation with reduced data possible for HFC operation, special version available
▶ Remote pressure control (DRG) function for flexible and convenient pressure adjustment in industrial systems
Hydraulic Axial Piston Pump A4VSO250 DRG Remote Pressure Control Complete Model
A A4VSO 250 DRG/30R-PPB13N00
Technical Specifications
|
Available Size |
A4VSO40 |
A4VSO71 |
A4VSO125 |
A4VSO180 |
A4VSO250 |
|
Series |
1X |
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|
Nominal Pressure |
350 / 380 bar |
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|
Maximum Pressure |
400 / 420 bar |
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Product Advantages
Core Positioning
Large-scale axial piston pump with Rexroth's DRG remote pressure control, tailored for massive hydraulic systems requiring centralized management and high power output. Its advanced design combines variable displacement technology with remote control functionality, delivering precise pressure adjustment for complex industrial applications.
Key Performance & Control Specs
Geometric displacement of 250 cm³/rev, nominal speed of 1500 rpm, delivering 375 l/min rated flow (max 870 l/min). The DRG remote controller allows pressure setting between 50–350 bar via an external relief valve (DBD 6/DBETA-6X), with a standard differential pressure of 20 bar (adjustable 20–50 bar). The final pressure control value is the sum of the external relief valve setting and differential pressure, ensuring precise pressure management across multiple pumps.
Remote Control Advantages
The external relief valve connects to the M14×1.5 XD port, enabling centralized pressure management for multi-pump configurations. With a 0.4 s swivel response time (Vg min→Vg max), it delivers smooth, rapid adaptation to remote commands, while mechanical displacement limits prevent over-displacement and protect system components. The modular design supports integration with FR flow control or DFR pressure-flow control for enhanced operational flexibility. Through-drive options facilitate combination pump setups, reducing system complexity.
Structural & Installation Flexibility
Weighs 184 kg, featuring an ISO 3019-2 4-hole flange (Ø224) for stable mounting. SAE J518 ports (3 in suction, 1.5 in pressure) come with M16×2 metric threads, and it supports all installation positions. Vertical mounting requires 10 l/min bearing flushing to lubricate the front bearing and shaft seal. The M42×2 R(L) drain port must be connected to the reservoir, with separate drain lines recommended for combination pumps to avoid case pressure overload.
Fluid & Operational Resilience
Compatible with mineral oils (HL/HLP), flame-resistant fluids (HFC/HFDU), and biodegradable options (HEES). Operates within a -20~+80°C temperature range, with hydraulic fluid viscosity spanning 20–380 mm²/s. Case pressure is limited to 4 bar absolute (6 bar peak) to protect shaft seals, and hydraulic fluid cleanliness of ISO 4406 17/15/12 (pilot valve) prevents contamination-related faults. Bearing flushing is required for special fluids to ensure optimal lubrication.
Industry Applications
Ideal for large-scale hydraulic power plants, heavy mining equipment, industrial mill hydraulics, and offshore oil and gas systems. Excels in shipyard cranes, steel processing machinery, and large-scale manufacturing plants requiring remote pressure control, high power, and variable displacement.
Our Advantage
CORE TECHNOLOGY
20+ years R&D experience, industry expert-led, independent IP rights
CORE IP PRODUCT
4WREE, 4WRKE, 4WRJE, 4WRLE, 4WRPEH, etc
OUTPUT
Proportional valve monthly output >10000+ pieces
BRAND
100% independent proportional valve brand, supporting brand customization
CUSTOMIZED ELECTRO-HYDRAULIC SYSTEM SOLUTIONS FOR ALL APPLICATIONS
Integrating core component development, system design and customized Implementation Services
APPLICATION FIELDS
• Precision Injection Molding
• Die Casting
• Metallurgy & Foundry
• New Energy
FAQ
Q: What are the key technical parameters of the 4WRZ series proportional valves?
A: The 4WRZ series is a pilot-operated proportional directional valve without on-board electronics, available in sizes 10-32. It supports external control electronics, with nominal flow ranging from 25-520 L/min (Δp=5 bar) and maximum operating pressure 350 bar. It features spring-centered spools, optional manual override, and compliance with ISO 4401 porting patterns.
Q: How does the PGX single pump ensure high volumetric efficiency?
A: The PGX single pump adopts axial and radial pressure compensation technology. Axial compensation is achieved through front/rear oil distribution plates balanced by pressure field backpressure, while radial compensation uses crescent plates and plastic rods for automatic gap adjustment. These designs maintain ≥95% volumetric efficiency even at low speeds and low viscosity.
Q: What makes the 4WRJE series suitable for industrial automation?
A: The 4WRJE series is a precision proportional valve with low hysteresis and high repeatability, supporting analog control signals. It has compact dimensions, easy integration with automation systems, and working pressure up to 350 bar. It is widely used in industrial robots, conveyor systems, and automated assembly lines requiring precise motion control.
Q: What is the operating temperature range of the ITM/ITMH hydraulic motors?
A: The ITM and ITMH hydraulic motors operate within a temperature range of -20°C to +80°C (hydraulic oil temperature), with ambient temperature tolerance of -20°C to +60°C. They use high-temperature resistant seals and lubricants, ensuring stable performance in both low-temperature and high-temperature working environments.
Q: What flow control capabilities do the 4WRAE series valves provide?
A: The 4WRAE series is a proportional flow control valve with adjustable flow rates, supporting 0-10V control signals. It has precise flow regulation (flow deviation <3%), working pressure up to 350 bar, and is suitable for hydraulic systems requiring variable flow control, such as plastic extrusion machines and hydraulic presses.
Q: How do the A4VSO and A10VSO pumps adapt to energy-saving systems?
A: The A4VSO and A10VSO axial piston pumps feature variable displacement design, adjusting flow output according to system demand to reduce energy consumption. They are compatible with servo frequency drive systems, with low noise and high efficiency, helping industrial equipment achieve energy-saving transformation.
Q: What safety features do the 4WRTE series proportional valves include?
A: The 4WRTE series is equipped with overload protection, undervoltage detection, and short-circuit protection functions. It has a spring-centered spool that returns to neutral position when de-energized, preventing unintended equipment movement. Optional manual override enables emergency operation, enhancing system safety.
Q: What connection options are available for the PGX single pump?
A: The PGX single pump supports multiple connection methods: SAE flange (F), threaded (M/UNF/G) for inlet/outlet ports; installation flanges including SAE-A-2 (82.55mm), SAE-B-2 (101.6mm), and SAE-C-2 (152.4mm); shaft types such as flat key and SAE spline (9-17 teeth), adapting to different installation requirements.
Q: What compatibility do your proportional valves have with hydraulic fluids?
A: All our proportional valves (4WREE/4WRPEH/4WRKE etc.) are compatible with HLP mineral oil (DIN 51524), HEES biodegradable oil (ISO 15380), and HFC flame-resistant fluid (ISO 12922). Seal materials include FKM (standard) and NBR/PTFE (optional), ensuring compatibility with diverse hydraulic fluids.
Q: How do you support maintenance of ITM/ITMH hydraulic motors?
A: We provide 1-year warranty for ITM/ITMH hydraulic motors, supplying genuine spare parts (gears, seals, bearings) for maintenance. Detailed maintenance manuals and video guides are available, and our technical team offers 24/7 support for troubleshooting. We also provide on-site maintenance services for complex issues, ensuring minimal downtime.
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