The Graco GH-2 Proportioner (SKU# 140220) is a compact but powerful 10kW hydraulic spray foam machine built for daily use in challenging jobsite conditions. Designed to offer reliable performance with minimal electronics, it’s ideal for professionals who prioritize simplicity, serviceability, and consistent output. Whether you’re spraying foam in residential attics or commercial roofs, this machine is ready to keep up.
With its maximum pressure of 2000 psi and up to 28 lb/min output, the GH-2 helps you maintain excellent spray quality throughout each job. Its straightforward analog design reduces complexity, which in turn speeds up troubleshooting and maintenance.
Controls & Technology
While other proportioners rely heavily on digital features, the GH-2 focuses on dependable, manual operation. That doesn’t mean it lacks tech—it means you get what you need without the excess. Here’s what the system includes:
- Hydraulic Drive System: Delivers steady material pressure and flow, even under long spray cycles.
- Analog Controls: Simple dials and gauges allow quick setup and adjustments.
- Thermocouple Feedback: Helps maintain proper temperature ranges for both A and B components.
- Safety Interlocks: Prevent operation when conditions fall outside safe limits.
As a result, users enjoy a lower learning curve and less downtime. This makes it especially useful for spray crews working in varied field conditions.
Output & Performance
Performance-wise, the GH-2 stands out for its stable delivery and rugged construction. It handles both light-duty and demanding spray applications with ease. Performance specs include:
- Max Output: 28 lb/min
- Max Working Pressure: 2000 psi (138 bar)
- Heater Power: 10kW (combined)
- Per Cycle Output: 0.074 gal (0.28 L)
- Temperature Limit: 190°F (88°C)
- Power Requirement: 230V, 1-phase, 50/60 Hz
These specifications ensure that your foam ratios stay consistent, even with long hose runs or colder ambient temperatures.
Maintenance & Service
Graco engineered the GH-2 to minimize service hassles. Thanks to its hydraulic design and accessible layout, routine maintenance becomes faster and easier. To keep your machine in top condition:
Daily Tasks:
- Inspect hoses and fittings
- Monitor hydraulic fluid levels
- Check for signs of wear or leaks
Weekly & Monthly:
- Clean or replace fluid filters
- Test over-temp switches
- Inspect heater and hose performance
Hydraulic System Notes:
- Reservoir Capacity: 3.5 gal (13.6 L)
- Recommended Fluid: ISO Grade 46 hydraulic oil
Because it lacks unnecessary electronics, fewer failure points exist—meaning more uptime for you.
Compatibility & Configuration
The Graco GH-2 Proportioner fits well into most rigs and integrates with a wide variety of gear. It’s flexible by design and easy to configure:
- Transfer Pumps: Compatible with Graco T3 or pneumatic drum pumps
- Spray Guns: Works with Fusion AP, Fusion CS, or Probler P2 guns
- Heated Hoses: Supports up to 310 feet (including whip)
- Bare Unit Design: Allows custom setup for rig builders and contractors
This open approach gives you more freedom to match your GH-2 to the jobs you do most.
Ideal Use Case
The GH-2 is perfect for spray foam professionals who:
- Want maximum reliability with minimal complexity
- Prefer analog systems that are easy to maintain
- Regularly work on mid- to large-scale insulation or roofing jobs
- Need a high-output, no-nonsense spray system that’s rig-ready
Whether you’re upgrading from a smaller machine or outfitting a new rig, the GH-2 offers a step up in performance without a steep learning curve.
Final Thoughts
The Graco GH-2 Proportioner delivers what professionals need most—performance, simplicity, and durability. Its hydraulic system powers through demanding applications while its analog controls give you confidence and speed in the field. For contractors who want results without extra complications, the GH-2 is a solid, smart investment.