The Rain Bird 552B Series Full/Part Circle Block Golf Rotor with ACME thread and a 51 Blue Nozzle is a high-performance irrigation component designed specifically for golf course applications. It offers both full-circle (360°) and adjustable part-circle (30° to 345°) coverage, allowing for precise water distribution across fairways, greens, and roughs. The ACME threaded connection ensures a secure and durable fit, ideal for high-pressure systems and demanding environments. Equipped with a 51 Blue Nozzle, this rotor delivers a flow rate between 6.80 and 14.00 gallons per minute, with a throw radius ranging from approximately 33 to 55 feet. The nozzle’s 12° trajectory balances distance and wind resistance, making it suitable for varied terrain and weather conditions. The rotor features Rain Bird’s MemoryArc technology, which allows users to quickly switch between two preset arc settings, and Rapid-Adjust functionality for fast arc changes using a standard screwdriver.

Specs:

• Radius: 33 to 37 feet (10.1 to 11.3 meters), depending on pressure
• Flow Rate: 6.8 to 9.3 GPM (0.43 to 0.59 L/s)
• Nozzle Trajectory: 12° for #51 Blue Nozzle
• Maximum Stream Height: 5 feet (1.5 meters)
• Arc Range: Full-circle (360°) or adjustable part-circle (30° to 345°)
• Rotation Time: 180° in = 90 seconds (nominally 80 seconds)
• Holdback: Up to 17 feet (5.2 meters) elevation change
• Inlet Thread: 1" ACME female
• Body Height: 9.6" (24.5 cm)
• Pop-Up Height to Mid-Nozzle: 2.6" (6.6 cm)
• Top Diameter: 4.25" (10.8 cm)
• Maximum Inlet Pressure: 100 psi (6.9 bar)
• Seal-A-Matic Check Valve: Prevents low-head drainage
• Rapid-Adjust Technology: Arc changes with a screwdriver
• MemoryArc: Stores two arc settings for quick switching
• Self-Flushing Action: Reduces clogging and stuck-up rotors
• Top-Serviceable Design: Access valve seat and rock screen without removing rotor
• Self-Adjusting Stator: Automatically regulates flow for consistent rotation