Overview
The Parker Gresen RPL-100-A-G is a compact, pilot-operated in-line relief valve designed for high-pressure hydraulic systems. Built to ISO 4401-05 port interfaces, this valve delivers dependable overpressure protection across industrial, agricultural, and mobile equipment applications. The screw-adjustable design allows field tuning from 500 to 5000 PSI, enabling quick system calibration without valve replacement.
Key Features
- Pilot-operated ball-type relief mechanism for smooth, consistent pressure regulation
- Screw-adjustable relief setting from 500 to 5000 PSI
- Compact in-line configuration for space-constrained installations
- 1″ NPT threaded ports for standard hydraulic fittings
- Cast-iron body with high-grade steel internal components
- ISO 16/13 SAE Class 4 filtration rating
Technical Specifications
- Model: RPL-100-A-G
- Manufacturer: Parker Gresen
- Port Size: 1″ NPT (1–1/2″ NPT compatibility)
- Maximum Pressure Rating: 5000 PSI (350 bar)
- Flow Capacity: 60 GPM (225 LPM)
- Adjustment Range: 500–5000 PSI
- Operating Temperature: –40°C to +95°C (–40°F to +200°F)
- Valve Type: Pilot-operated ball-type relief
- Body Material: High-strength cast iron
- Filtration: ISO 16/13 SAE Class 4
- Mounting: In-line, no restrictions
- Country of Origin: United States
Typical Applications
The RPL-100-A-G excels in main system relief duty across diverse hydraulic platforms. Common uses include:
- Heavy equipment and mobile machinery (loaders, dozers, excavators)
- Agricultural hydraulic systems (tractors, balers, spreaders)
- Industrial presses and stamping machines
- Dump-truck hoist systems
- Log-processing and forestry equipment
- Compact power units and circuit manifolds
Compatibility & Replacements
Compatible With
- Parker Gresen hydraulic circuits and systems
- Standard 1″ NPT threaded ports and SAE porting schemes
- ISO 4401 sandwich and sub-plate cavity configurations
- Hydraulic systems rated 5000 PSI and below
- Mineral oil and biodegradable hydraulic fluids (verify fluid compatibility)
Replaces / Drop-In Replacement For
- RPL-100-A (all variants and relief settings)
- RPL-100-A-2500 (2500 PSI pre-set)
- RPL-100-A-3000 (3000 PSI pre-set)
- Gresen PRV-100-A series relief valves
Works With
- Screw adjustment for 500–5000 PSI field calibration
- Manual pressure gauges and analog pressure transducers
- ISO 4401-05 cavity designs and sandwich plates
- All standard hydraulic fluids meeting ISO VG 32–46 specifications
