Standard response sprinkler RFII-MRI

Overview
The Tyco® RFII‑MRI non‑magnetic concealed pendent sprinkler is designed for installation inside MRI system rooms and other magnetically sensitive environments. Tested to 7 Tesla, the sprinkler resists magnetic fields significantly higher than typical MRI equipment. The two-piece separable assembly (sprinkler/support cup plus cover plate/retaining ring ordered separately) allows pressure testing and ceiling finishing to be completed independently of final cover installation, and provides up to 1/2 in (12.7 mm) vertical adjustment.

Features

• Non-magnetic construction suitable for MRI rooms and sensitive medical areas
• Concealed pendent design with decorative flat cover plate
• 5.6 K-factor; available in quick-response (3 mm bulb) and standard-response (5 mm bulb)
• UL and C-UL Listed
• Internally threaded closure with 1/2 in (12.7 mm) vertical adjustment
• Referenced SIN/part numbers: TY3550, TY3530

Benefits

• Compatibility: minimizes interference risk in MRI environments
• Operational flexibility: allows system pressure testing before ceiling installation
• Maintenance friendly: suspended ceiling panels can be removed without shutting down the fire protection system
• Concealed profile reduces accidental damage and unintended actuation

Product Table
Orientation: Concealed Pendent
K-Factor: 5.6
Temperature Rating: Up to 200°F (approx. 93°C)
Response: Standard, Quick

Technical Specification

• Model: RFII-MRI
• Brand: Tyco®
• Type: Non-magnetic concealed pendent sprinkler (decorative, flat cover plate)
• K-Factor: 5.6
• Response types: Quick-response (3 mm bulb) and Standard-response (5 mm bulb)
• Temperature rating: Up to 200°F (93°C)
• Orientation: Concealed pendent
• Listings and approvals: UL and C-UL Listed
• Thread size: 1/2-inch (internally threaded closure)
• Wrench designation: RFII
• Assembly: Two-piece separable design — sprinkler/support cup plus cover plate/retaining ring (cover sold separately)
• Installation note: Permits pressure testing prior to suspended ceiling or finish coating and allows removal of ceiling panels without system shutdown
• Adjustment: 1/2 in (12.7 mm) vertical adjustment