GP2-8R-RECH-SGCGC-N ARGO-HYTOS Gear Pump 250Bar

Product Overview

The GP2-8R-RECH-SGCGC-N is an ARGO-HYTOS GP2 High Performance fixed-displacement external gear pump with an actual displacement of 8.2 cm³/rev.

The official ARGO-HYTOS GP2 datasheet specifies a nominal speed of 1500 rpm, minimum speed of 650 rpm, and maximum speed of 3500 rpm for the GP2 range covering the 8.2 cm³ configuration. At nominal speed, the published flow rate is 11.32 L/min. Maximum flow is specified as 26.4 L/min under the published maximum-speed and pressure condition.

The pump is rated for 250 bar maximum continuous pressure, 270 bar maximum short-time pressure, and 280 bar peak pressure. ARGO-HYTOS defines these as separate pressure classes: continuous pressure has no time limitation, 270 bar is limited to a maximum of 20 seconds, and 280 bar is a transient peak caused by sudden operating-condition changes.

The GP2 platform uses axial play compensation, high-strength quality aluminium alloys, and a low-noise mechanical design. ARGO-HYTOS specifies volumetric efficiency between 92% and 98% and mechanical efficiency of approximately 85%.

The complete configuration GP2-8R-RECH-SGCGC-N specifies clockwise rotation, RE flange design, CH shaft type, standard port orientation, G1/2 BSPP inlet/outlet connections and NBR sealing.

For replacement applications, the complete configuration should be matched rather than selecting a pump by displacement alone. Our replacement engineering focuses on in-place dimensional and functional interchangeability, supported by 100% simulated operating-condition testing before delivery.

Technical Specifications

• Model: GP2-8R-RECH-SGCGC-N
• Brand: ARGO-HYTOS
• Series: GP2 High Performance Gear Pump
• Pump Type: Fixed-displacement external gear pump
• Actual Displacement: 8.2 cm³/rev
• Nominal Speed: 1500 rpm
• Minimum Speed: 650 rpm
• Maximum Speed: 3500 rpm
• Maximum Continuous Pressure: 250 bar
• Maximum Short-Time Pressure: 270 bar, max. 20 s
• Peak Pressure: 280 bar
• Nominal Flow: 11.32 L/min at 1500 rpm
• Maximum Flow: 26.4 L/min under the published maximum-speed and pressure condition
• Nominal Input Power: 5.90 kW
• Maximum Input Power: 14.85 kW
• Control Method: Fixed displacement, mechanical
• Rotation: Clockwise / R
• Flange Design: RE
• Shaft Type: CH
• Port Orientation: S = Standard
• Inlet Port: GC = G1/2 BSPP for the ≤8.2 cm³ configuration
• Outlet Port: GC = G1/2 BSPP
• Seal: N = NBR
• Housing Material: High-strength quality aluminium alloy
• Volumetric Efficiency: 92–98%
• Mechanical Efficiency: 85%
• Inlet Pressure: −0.2 to +0.5 bar
• Recommended Viscosity: 16–200 mm²/s
• Cold-Start Viscosity: Up to approximately 1200 mm²/s
• NBR Fluid Temperature: −25°C to +80°C
• Hydraulic Fluid: HL/HLP hydraulic oils according to DIN 51524
• Fluid Cleanliness at ≥200 bar: ISO 4406 20/17/14 maximum reference
• Weight: Not separately published for this complete configuration in the current ARGO-HYTOS technical table; a third-party listing reports approximately 2.915 kg, but this figure is not treated as an official specification.

Configuration Code

GP2-8R-RECH-SGCGC-N

• GP2 — GP2 Series
• 8 — 8.2 cm³/rev displacement class
• R — Clockwise rotation
• RE — Flange design
• CH — Shaft type
• S — Standard port orientation
• GC — G1/2 BSPP inlet
• GC — G1/2 BSPP outlet
• N — NBR seal

The official GP2 datasheet identifies GC as a G1/2 BSPP port for displacement sizes up to 8.2 cm³/rev.

Key Technical Advantages

1. Compact 8.2 cm³/rev Displacement

The GP2-8 provides 8.2 cm³/rev of actual displacement with an official nominal flow of 11.32 L/min at 1500 rpm. Maximum flow is specified at 26.4 L/min under the published maximum operating condition.

2. Axial Play Compensation

ARGO-HYTOS uses axial play compensation to control internal clearances and leakage under pressure. The GP2 platform achieves published volumetric efficiency of 92–98%.

3. 250 Bar Continuous Pressure

The GP2-8 configuration supports 250 bar maximum continuous pressure, providing a substantial pressure capability for compact fixed-displacement hydraulic systems.

4. 280 Bar Transient Peak

The pump allows a 280 bar peak-pressure event, but this value applies to short transient pressure changes and is not a continuous-duty rating.

5. High-Strength Aluminium Housing

The GP2 platform uses high-strength quality aluminium alloys and is designed for low noise, reliability and long operating life.

6. Standardized Mechanical Interfaces

The GP2 family supports international SAE, ISO and DIN flange systems. The requested model combines an RE flange, CH shaft, standard port orientation and G1/2 BSPP ports, providing a clearly defined mechanical configuration for replacement work.

Application Areas

Typical applications include:

• Industrial hydraulic power units
• Compact hydraulic stations
• Mobile construction machinery
• Agricultural machinery
• Material-handling equipment
• Hydraulic lifting equipment
• Industrial automation
• Auxiliary hydraulic circuits
• Hydraulic clamping systems
• Hydraulic test equipment
• Compact high-pressure hydraulic systems
• Industrial machinery auxiliary circuits

ARGO-HYTOS positions the GP2 platform as a high-performance hydraulic drive gear-pump family focused on low noise, high volumetric efficiency, reliability and standardized mounting interfaces.

Expert Maintenance Tips

1. Verify Rotation Before Commissioning

The R code specifies clockwise rotation. ARGO-HYTOS requires rotation to be determined from the drive-shaft side and states that the pump must only be operated in the specified direction.

2. Protect the Suction Side

The official inlet-pressure range is −0.2 to +0.5 bar. Suction piping should be adequately sized and kept free from excessive restriction, clogged filtration and air leakage.

3. Verify the G1/2 Connections

The GCGC configuration corresponds to G1/2 BSPP inlet and G1/2 BSPP outlet. Confirm thread type, sealing arrangement and port orientation before replacing an existing pump.

4. Respect the Pressure Limits

Engineering design should distinguish:

250 bar = continuous pressure

270 bar = short-time pressure, maximum 20 s

280 bar = transient peak pressure

ARGO-HYTOS explicitly states that peak pressure is associated with sudden operating changes and must not be exceeded during operation.

5. Maintain Fluid Cleanliness

At operating pressures of 200 bar and above, the published contamination reference is ISO 4406 20/17/14. Filter differential pressure and hydraulic-fluid cleanliness should therefore be included in preventive maintenance.

6. Protect the Pump at High Speed

The GP2-8 maximum speed is 3500 rpm. At high speed, suction-line pressure loss, hydraulic-fluid temperature and viscosity become increasingly important to pump filling and operating stability.

7. Match the Full Configuration

For replacement, verify the complete:

GP2-8R-RECH-SGCGC-N

including:

8.2 cm³/rev + clockwise rotation + RE flange + CH shaft + standard orientation + G1/2 inlet/outlet + NBR seal.

This complete-code approach provides a much more reliable basis for in-place interchangeability than matching the GP2-8 displacement class alone.