Guangdong Sheungchak Hydraulic Technology Co., Ltd. is one of the leading manufacturers and suppliers of a4vso250 in China. With abundant experience, we warmly welcome you to buy high-grade a4vso250 for sale here from our factory. All customized products are with high quality and competitive price. Contact us for quotation.
A4VSO250 is a variable displacement axial piston pump for open-circuit hydraulic systems. It uses a swashplate rotary group, so flow follows both speed and displacement. In plain terms, the pump does not stay locked at one output. The swash angle changes, the output changes with it. That is why this series makes sense on machines and hydraulic stations that do not run one fixed flow all day.
This size sits in the heavier part of the A4VSO range. Not the small end. Not the biggest body either. It is usually the kind of size people look at when the system already needs real flow, real pressure, and a pump that can keep up without turning the whole power unit into an oversized build. The family is described as a robust high-pressure pump for industrial applications, and size 250 is one of the common larger mid-range options in that line.
What separates this type from simpler pump layouts is not only pressure. It is control range, response, and the fact that the flow can be matched to the job instead of being fixed from start to stop. The series also carries features people actually care about in day-to-day use: strong suction behavior, lower noise, modular layout, optional through drive, and a visible swivel angle indicator. Those details matter more once the pump is already on a real machine.
Key Features & Benefits
Variable displacement means the pump can supply what the system needs instead of pushing one fixed flow all the time..
Swashplate design is well suited to open-circuit hydrostatic drives.
Size 250 gives high flow capacity without jumping all the way to the biggest frame sizes in the series.
Nominal pressure 350 bar and max pressure 400 bar keep it in the serious-duty class.
Excellent suction performance helps on real installations where inlet conditions are not perfect.
Low noise level and long service life are part of the core series design.
Modular structure and variable through-drive options make system matching easier.
Pressure, flow, combined pressure-flow, and power control options are all available in this family.
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Technical Specifications
|
Model |
Version |
Displacement (cc/rev) |
Nominal Pressure (bar) |
Max Pressure (bar) |
Nominal Speed (rpm) |
Max Speed (rpm) |
Flow (L/min) |
Ports |
Approx. Weight |
|
A4VSO250 |
Standard rotary group |
250 |
350 |
400 |
1500 |
1800 |
375 @ nnom, Vg max |
S: 3 in / B: 1 1/2 in / Drain: M42×2 |
184 kg |
|
A4VSO250H |
High-speed version |
250 |
350 |
400 |
1900 |
2100* |
475 @ nnom, Vg max |
Confirm by exact code |
184 kg |
For the high-speed size-250 version, 2100 rpm is the listed maximum at reduced displacement, not at full Vg max.
The table above combines the size-250 technical data with the size-250 port information. On the standard rotary group, the main figures are 250 cc/rev, 350 bar nominal pressure, 400 bar maximum pressure, 1500 rpm nominal speed, 1800 rpm maximum speed, 375 L/min flow, and 184 kg approximate weight without through drive. The standard size-250 port layout shows 3 in suction port S, 1 1/2 in pressure port B, and M42×2 drain connections.
Common control choices on this family include DR pressure control, DRG remotely operated pressure control, DP/DPF for parallel pressure control, FR flow control, DFR combined pressure and flow control, and LR2 / LR3 power control variants. Pressure controller setting range is listed from 50 to 350 bar.
For shafts, size 250 commonly uses either a parallel keyed shaft P or splined shaft Z, so that point should be confirmed early when quoting. It saves trouble later.
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How It Works
The shaft turns the rotary group, and the pistons follow the swashplate
Inside A4VSO250, the drive shaft rotates the cylinder block. The pistons run against the swashplate surface, and that motion creates alternating suction and discharge inside the rotating group. It is the core mechanism of a swashplate axial piston pump. No mystery there.
Flow changes when the swash angle changes
This is the reason the pump is variable. Increase the swash angle and the pump moves more oil per revolution. Reduce the angle and output drops. That is why the series can follow different system demands instead of acting like a fixed pump that only knows one flow. In the standard characteristic data for size 250, the listed flow is 375 L/min at 1500 rpm and Vg max.
The control section trims displacement to match pressure, flow, or power demand
Depending on the control code, the pump can reduce displacement when system pressure reaches the set value, when a metering condition calls for lower flow, or when drive power needs to stay inside a defined limit. That is the practical difference on the machine side. The pump does not just make oil move. It can be set up to behave with the system instead of fighting it.
Model Range
|
Control Type |
Models |
Typical Application |
|
HD |
A4VSO250 |
Hydraulic proportional control systems, industrial and mobile applications |
|
HW |
A4VSO250 |
Manual lever-controlled displacement adjustment systems |
|
DG |
A4VSO250 |
Hydraulic pilot control circuits |
|
DA |
A4VSO250 |
Pressure/flow controlled drive systems |
|
EP |
A4VSO250 |
Electro-hydraulic proportional displacement control systems |
|
EO |
A4VSO250 |
Electro-hydraulic control with proportional solenoid |
|
ET |
A4VSO250 |
Direct electric proportional control systems |
|
DR |
A4VSO250 |
Pressure control applications |
|
DRG |
A4VSO250 |
Remote pressure control systems |
|
DFR |
A4VSO250 |
Pressure-flow control systems |
|
DFE1 / DFE2 |
A4VSO250 |
Electro-hydraulic pressure and flow control systems |
Applications & Industries
Hydraulic Power Units
Hydraulic stations.Power packs.High-pressure use.
Press Construction
Press lines.Stable pressure.Controlled supply.
Plastics Machinery
Plastics equipment.Larger hydraulic units.Better flow control.v
Heavy Industry
Heavy-duty systems.High-pressure work.Tough cycles.
Marine Hydraulic Systems
Marine power units.Auxiliary hydraulics.Onboard service.
Retrofit / Modernization Projects
Replacement for older stations.Upgrade use.Less redesign.
About Us
Sheungchak is an OEM hydraulic manufacturer focused on hydraulic motors, pumps, valves, and related spare parts. We produce our own products and support customers through model confirmation, production follow-up, and shipment.
A lot of customers are asking for the same few things.
Correct model. Stable quality. Clear reply. Delivery that can actually be tracked.
That is how we handle the A4VSO250 too.
OEM production
Nameplate customization
Packing adjustment
Drawing or sample confirmation
Export shipment suppor
Years in business
20+ years
Main products
Axial piston pumps / hydraulic motors / valves / spare parts
Main markets
Europe / South America / Middle East / Southeast Asia / Africa
Main strengths
OEM production / technical support / stable lead time / export service
Certifications
Certificate name
Certificate name
Certificate name
Certificate name
Certificate name
Our Factory & Quipment
cooperative partner
We are looking for a cooperative partner to expand our business.
FAQ
1) Is A4VSO250 an open-circuit pump?
Yes. This model belongs to the open-circuit A4VSO family. If your system is closed loop, this is the wrong starting point.
2) Is it a fixed pump or a variable pump?
Variable pump. Flow changes with speed and swash angle, which is the whole point of this design. It gives the system more room than a fixed displacement pump.
3) What pressure can A4VSO250 handle?
Nominal pressure is 350 bar. Maximum pressure is 400 bar. The 400 bar value is the top end, not something to treat like everyday casual use.
4) What flow does size 250 make?
On the standard rotary group, the listed flow is 375 L/min at nnom and Vg max. The high-speed version is listed at 475 L/min. Real circuit flow still depends on speed, fluid condition, and setup.
5) Can it be supplied with different controls?
Yes. DR, DRG, DP, FR, DFR, LR2, and LR3 are all part of the family. The right one depends on whether the machine cares most about pressure limiting, flow control, or power control.
6) Does it support through drive?
Yes, the series has variable through-drive options. But on real orders, the torque side has to be checked properly. "Can bolt together" and "should run together" are not always the same thing.
7) What port size does A4VSO250 use?
On the standard size-250 body, the suction port is 3 in SAE, the pressure port is 1 1/2 in SAE, and drain ports are M42×2. Still, final port arrangement should be matched to the exact code and port plate version before order.
8) What do you need from me before quoting?
Best case, send the full model code. If not, send old pump photos, shaft detail, flange, control type, port direction, and the machine application. For A4VSO250, control code and shaft style are two of the first things worth locking down.
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