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A4VSO250DRG/30L-PPB13N00 Rexroth Germany original A4VSO250 series hydraulic

China A4VSO250DRG/30L-PPB13N00 Rexroth Germany original A4VSO250 series hydraulic

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A4VSO250DRG/30L-PPB13N00 Rexroth Germany original A4VSO250 series hydraulic

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Rotation Direction	L = Counter-Clockwise (CCW) — viewed from shaft end
Supply Ability	100
Mounting Flange	ISO 3019-2 (4-bolt, metric)
Shaft Type	Parallel Key Shaft (DIN 6885)
Packaging Details	wooden box
Through Drive	N00 = No through-drive (cannot mount auxiliary pump on rear)
Payment Terms	Western Union,T/T,D/P,D/A,L/C
Delivery Time	2 weeks
Port Configuration	PPB13: SAE flanged ports, metric screws, Series 13 port plate
Model Number	A4VSO250DRG/30L-PPB13N00
Certification	ISO
Brand Name	Rexroth
Place of Origin	Germany

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Product Specification


Rotation Direction	L = Counter-Clockwise (CCW) — viewed from shaft end	Supply Ability	100
Mounting Flange	ISO 3019-2 (4-bolt, metric)	Shaft Type	Parallel Key Shaft (DIN 6885)
Packaging Details	wooden box	Through Drive	N00 = No through-drive (cannot mount auxiliary pump on rear)
Payment Terms	Western Union,T/T,D/P,D/A,L/C	Delivery Time	2 weeks
Port Configuration	PPB13: SAE flanged ports, metric screws, Series 13 port plate	Model Number	A4VSO250DRG/30L-PPB13N00
Certification	ISO	Brand Name	Rexroth
Place of Origin	Germany
High Light	Rexroth A4VSO250 hydraulic piston pump ，A4VSO250DRG piston pump with warranty ，original Rexroth Germany piston pump

A4VSO250DRG/30L-PPB13N00 Rexroth Germany Original A4VSO250 Series Hydraulic Piston Pump

A4VSO250DRG/30L-PPB13N00 — Variable Displacement Axial Piston Pump (A4VSO Series, Open Circuit)

Important: A4VSO is a hydraulic pump (not a motor) for mineral oil hydraulic systems only. It cannot pump water and must not be run dry or in reverse rotation.

Parameter Specification Table

Parameter Category	Parameter	Specification / Description
General Information	Manufacturer / Series	Rexroth (Germany), A4VSO Open Circuit Variable Axial Piston Pump
	Full Model Code	A4VSO250DRG/30L-PPB13N00
	Functional Summary	250 cm³ displacement • DRG Pressure Compensator w/ Remote Pilot Option • CCW Rotation • PPB13 Ports • No Through-Drive
Hydraulic Performance	Geometric Displacement	250 cm³/rev (≈ 15.3 in³/rev)
	Nominal Continuous Pressure	350 bar (≈ 5075 psi)
	Peak Intermittent Pressure	400 bar (≈ 5800 psi)
	Recommended Speed Range	1000 - 1500 rpm (Max ~1800 rpm subject to inlet conditions)
	Theoretical Flow @ 1500 rpm	250 × 1500 ÷ 1000 = 375 L/min
Control Type	DRG — Pressure Compensator (Constant Pressure Control) with Remote Pilot Port (X): • Local mechanical screw sets max pressure • Port X accepts external pilot pressure to reduce/override setpoint • Below set pressure → full displacement; at set pressure → de-strokes to maintain pressure
Mechanical Interface	Shaft Type	Parallel Key Shaft (DIN 6885)
	Rotation Direction	L = Counter-Clockwise (CCW) — viewed from shaft end
	Mounting Flange	ISO 3019-2 (4-bolt, metric)
	Port Configuration	PPB13: SAE flanged ports, metric screws, Series 13 port plate
	Through Drive	N00 = No through-drive (cannot mount auxiliary pump on rear)
Seals & Media	Seal Material	NBR (Nitrile Rubber) — standard for mineral oil
	Compatible Fluids	Mineral oils (HL/HLP), HFC (Water Glycol with derating); NOT HFD unless FKM-sealed
	Oil Temperature Range	−20 °C to +70 °C (with NBR seals)
	Fluid Cleanliness Required	ISO 4406 17/15/12 or cleaner (NAS 1638 Class 7 equivalent)
Physical Data	Approximate Weight	135 kg
	Case Drain Ports	2 × G1/2 (use one to tank, plug the other; backpressure ≤ 0.5 bar)
	Recommended Suction Line	≥ DN50/DN65, short & straight, with 100 mesh (149 µm) suction strainer

Model Code Breakdown

A4VSO 250 DRG / 30 L - PPB13 N00
│ │ │ │ │ │ └── No through-drive
│ │ │ │ │ └── PPB13: SAE flanged / metric screws / Series 13
│ │ │ │ └── L: Counter-Clockwise (CCW) viewed from shaft end
│ │ │ └── 30: Series code (size group / design generation)
│ │ └── DRG: Pressure Compensator + Remote Pilot Port X (local adj. sets max; pilot can lower it)
│ └── 250 cm³/rev geometric displacement
└── A4VSO: Open Circuit Variable Axial Piston Pump (Heavy-Duty Industrial)

Frequently Asked Questions (In-Depth)

Q1: What is "DRG" control and how is it different from plain "DR" or "DFR"?

A:
- DR (basic): Pressure compensator with local mechanical adjustment only. Set screw determines the cutoff pressure; no external influence possible.
- DRG (this model): Same pressure compensator PLUS a pilot port (X). The local screw sets the maximum pressure; an external pilot signal can reduce the effective setting — i.e., pilot pressure at X subtracts from the local spring setting. Useful when you need to change the pump's pressure cap electrically/pneumatically or from a remote station.
- DFR / LR2: Adds Load Sensing (LS) function — pump tracks valve-bank LS signal with a fixed ∆p. DRG has no LS; it's purely a remotely-influenceable pressure limiter.
- When to choose DRG: You need a simple pressure-limited pump but also want the ability to remotely lower/modulate the pressure setpoint without a full LS setup.

Q2: The rotation code is "L" (30L) — how do I verify and what if it's wrong?

A:
- L = Counter-Clockwise (CCW): Face the drive shaft end (coupling side looking into the pump); the shaft must rotate counter-clockwise.
- Check motor rotation arrow or perform a brief jog test before final coupling.
- Running in reverse on an L pump:

Port plate suction/pressure windows are asymmetrical → suction failure → cavitation/seizure
Internal lubrication galleries are directional → immediate loss of lube film
Damage is near-instantaneous → total pump destruction
Correct by re-phasing motor or ordering an "R" (clockwise) version — never force reverse run

Q3: What are the suction (inlet) requirements for this 250 cc pump?

A:
1. Minimum absolute inlet pressure ≥ 0.8 bar (gauge ≈ −0.2 bar vacuum max).
2. For sustained 1500+ rpm, a boost pump providing 1.0-1.5 bar positive head is recommended for margin.
3. Suction line:

Inner diameter ≥ DN50 (DN65 preferred)
Length as short as possible (< 1.5 m), minimize elbows
100 mesh (149 µm) suction strainer with < 0.05 bar pressure drop

4. Tank outlet submerged ≥ 300 mm or above pump inlet.
Cavitation symptoms: high-pitched whine, valve plate pitting, flow drop, premature bearing failure.

Q4: Can I mount a gear pump on the rear for charge/pilot pressure?

A: No. The suffix N00 = no through-drive shaft. Rear housing is blanked. If you need a through-drive for an auxiliary pump, select a version with through-drive code such as K01, K02, K51, etc. For DRG you typically still need a separate pilot pressure source for port X if remote control is used.

Q5: How must the case drain (L port) be plumbed?

A:
- Connect one case drain port via a dedicated line directly to the tank (above oil level or looped to prevent siphon).
- Backpressure ≤ 0.5 bar (ideally 0 bar). Plug the unused drain port.
- Never: block it, tie it into a pressurized return line, or share a small-bore return with other valves.
- Result of neglect: Housing pressurizes → shaft seal blowout, valve plate distortion, bearing overheating → pump fails.

Q6: What drive motor power is required?

A: At 350 bar / 1500 rpm / full displacement:
- Hydraulic power Pₕ = (250 × 10⁻⁶ × 350 × 1500) ÷ 600 ≈ 219 kW
- With ηₘₑcₕ ≈ 0.90 → shaft input ≈ 243 kW

➡ Recommended drive: 250 kW (≈335 HP) electric motor, S1 duty, with adequate starting torque for 400 bar peak. Avoid prolonged operation below ~750 rpm minimum continuous speed.

Q7: Are NBR seals OK with HFC or HFD fluids?

A:
- ✅ HFC (Water Glycol): NBR acceptable with pressure/temperature derating per Rexroth (typically ×0.8 pressure factor, watch Tmax).
- ❌ HFD (Phosphate Ester): NBR will swell → must specify FKM (Viton) seal version (/V suffix or explicit FKM option).
- Standard mineral oil (HL/HLP) → no issue with NBR.

Q8: What are the key commissioning steps?

A:
1. Fill & bleed: Loosen case drain and HP port bleed screw. Hand-rotate shaft while filling till oil flows bubble-free.
2. Verify case drain line is open to tank.
3. Jog-test rotation — confirm CCW (L), no abnormal noise.
4. Low-pressure run-in: Back off DR adjustment screw (minimum pressure); run briefly to purge air from system and lines.
5. Set pressure: Slowly turn DR screw clockwise to desired max pressure. If using pilot port X, verify remote lowering function.
6. Lock & document: Tighten lock nut on DR adjuster; record both local and (if applicable) pilot-influenced settings.

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Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha... Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha...

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Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd.
Nan'an, Fujian Province, China
https://www.electrichydpump.com/

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