Parker PGP517 Series Fixed Displacement External Gear Pump

Product Description

The PGP517 is the largest frame size within Parker PGP500 aluminium gear pump family. It is a high-performance fixed-displacement external gear pump designed for mobile hydraulics. Its matching gear motor is PGM517. Featuring 13-tooth optimized gear profile, pressure-balanced thrust plates and heavy-duty journal bushings, PGP517 delivers larger flow output than PGP505 and PGP511. Single, tandem and multi-section configurations are available. It is widely adopted for medium-to-heavy mobile hydraulic systems requiring lightweight aluminium construction, compact installation and stable high-pressure performance.

1. Overview

PGP517 is an external-meshing fixed displacement gear pump. The 13-tooth gear geometry minimizes flow ripple and operating noise. Its modular design enables flexible selection of mounting flanges, shaft ends, port arrangements, seal materials and integrated valves. Clockwise (CW) and counter-clockwise (CCW) rotation are standard options. It is the preferred high-flow aluminium gear pump for tractors, medium-sized construction machinery, forklifts and large aerial work platforms.

2. Construction & Key Features

1. Three-piece high-strength aluminium housing: Light weight, excellent heat dissipation and sufficient rigidity, suitable for mobile applications with weight limitation. Cast iron flange options are available for heavy-duty installation.
2. Pressure-balanced thrust plates: Automatically compensates axial clearance, sustains high volumetric efficiency over the service life and reduces friction and wear.
3. Heavy-duty journal bushing design: Fluid-lubricated bearings provide reliable load capacity for continuous operation. Axial thrust on the drive shaft is not allowed. Outboard bearing versions are optional for applications with significant radial shaft loads.
4. Precision ground 13-tooth gear set: Optimized tooth profile, low flow pulsation, quiet operation, volumetric efficiency up to 96%. Silent version (PGP517H) is available for low-noise requirements.
5. Modular construction: Multiple SAE B 2-bolt flanges, rectangular through-bolt flanges, shaft ends and port styles are optional. Tandem multi-pump assembly is supported to supply independent hydraulic circuits from one driving source.
6. Integrated valve options:
   • Relief valve with anti-cavitation check valve
   • Priority flow valve
   • Load-sensing unloading valve
   • Solenoid unloading relief valve, cross-port relief valve, etc.

3. Main Technical Specifications

• Displacement range: 14 ~ 70 cm³/rev (codes: 0140, 0160, 0190, 0230, 0250, 0280, 0330, 0360, 0380, 0440, 0520, 0580, 0700)
• Max continuous pressure:
  • 14–28 cm³/rev: 250 bar (3625 psi)
  • 33–44 cm³/rev: 230 bar (3335 psi)
  • 52–70 cm³/rev: 200 bar (2900 psi)
• Max intermittent pressure: up to 275 bar (3988 psi)
• Speed range: 500 rpm ~ 3300 rpm; maximum speed reduces for larger displacement codes
• Rotation: CW / CCW
• Standard mounting: SAE B 2-bolt flange, rectangular through-bolt flange; custom flanges on request
• Shaft options: keyed shaft, SAE B splined shaft, tapered shaft
• Port options: SAE split flange, SAE straight thread, BSPP, metric thread; side or rear port layout
• Compatible fluid: Anti-wear mineral hydraulic oil. FPM fluorocarbon seals optional for water-glycol, emulsion and fire-resistant fluids; FPM seals mandatory for phosphate ester fluids.
• Recommended viscosity: 16 ~ 100 cSt
• Suction requirement: Minimum absolute inlet pressure ≥0.8 bar to avoid cavitation
• Approx. weight: 5.8 ~ 8.5 kg (varies with displacement and configuration)

4. Typical Applications

• Construction machinery: medium excavators, skid steer loaders, large aerial work platforms
• Agricultural equipment: tractors, combine harvesters, forage harvesters
• Material handling: heavy forklifts, large tailgate lifting systems, loading equipment
• Mobile hydraulic power packs, forestry machinery, sanitation trucks and municipal vehicles

5. Ordering Code Explanation

Example model: PGP517B0280HP3D1NE3E3

• PGP517: Series identifier (PGM517 = matching gear motor)
• A: Single pump; B: Tandem / multi-section pump
• 0280: Displacement code (28 cm³/rev)
• C / E: Rotation (CCW / CW)
• P3: Flange code
• D1: Shaft type code
• N: Seal material code
• E3E3: Port configuration
• Suffix codes: integrated valve, revision version

Note: Verify port layout, shaft diameter, rotation direction and built-in valves before pump replacement.

6. Operation Guidelines

1. Direct drive by flexible coupling is recommended. Avoid excessive radial shaft loads; select outboard bearing version if significant radial force exists.
2. Suction line must be sized adequately. Keep low inlet pressure drop to prevent cavitation damage to thrust plates and gear sets.
3. Recommended filtration: 10 μm hydraulic filter. Regular oil change is required. Although tolerant to contamination, solid particles accelerate thrust plate wear.
4. Built-in relief valve is only for system protection. It is NOT designed for continuous throttling or pressure regulation duty.
5. For tandem pumps, each section has its independent pressure rating. Check displacement and pressure separately for every section during selection.

7. Differentiation from Related Series

• PGP517: Largest aluminium frame in PGP500 family, 13-tooth gear, displacement 14–70 cc/rev, high flow
• PGP502 / PGP503: Small-frame aluminium pumps, 9-tooth gear, tiny displacement
• PGP505: Small-medium aluminium frame, 13-tooth gear, displacement 2–12 cc/rev
• PGP511: Medium aluminium frame, 12-tooth gear, displacement 6–33 cc/rev
• PGP350 / PGP365: Cast iron heavy-duty pumps for severe mobile working conditions
• PGM517: Gear motor sharing identical housing, cannot be used as a pump