PDQ MR148 PFEF Classroom Function Mortise Lockset - Grade 1

The PDQ MR148 PFEF is a premier Grade 1 Classroom Function Mortise Lockset designed for elite durability in educational and institutional settings. While the industry standard for Grade 1 is one million cycles, the PDQ MR Series is tested to over 11 million cycles, providing 11 times the mechanical lifespan of competing locks. This makes it the definitive security solution for K-12 schools, universities, and municipal buildings where hardware longevity and student safety are the highest priorities.

Constructed with a 12-gauge cold rolled steel mechanism and an investment cast stainless steel latchbolt, the MR148 is built to withstand extreme physical abuse. The Philadelphia (PHL) lever features a return-to-door design that is fully ADA compliant, preventing clothing or bags from snagging on the hardware—a critical safety feature in crowded school hallways. Finished in US26D Satin Chrome, this lockset offers a professional architectural appearance while providing a lifetime of reliable, heavy-duty service.

ANSI Function F05: Classroom Security

The ANSI F05 Classroom Function is specifically engineered to provide flexible access control, allowing faculty to toggle the exterior side of the door between a secure and accessible state.

• Key-Controlled Access: The exterior lever is locked or unlocked by a physical key from the outside. When "unlocked," the door functions as a passage set; when "locked," the exterior lever is rigid, requiring a key for entry.
• Positive Self-Latching: Even when the lever is in the locked state, the 3/4" anti-friction latchbolt ensures the door remains positively latched upon closing, maintaining its 3-hour fire rating integrity.
• Fail-Safe Interior Egress: The interior lever is always active and provides immediate, uninhibited egress. This ensures that occupants can always exit the room in a single motion, satisfying all life-safety and fire code requirements.
• Vandal-Resistant Security: The auxiliary deadlatch engages when the door is closed, preventing intruders from using tools to shim or "loid" the latchbolt from the exterior.

Technical Specifications

Engineered Solutions for Educational Facilities

The PDQ MR Series is designed to solve the specific maintenance and safety challenges found in institutional infrastructure:

• Unmatched Mechanical Resilience: By testing to 11 million cycles, PDQ provides a solution for the high-frequency use of classroom doors, significantly reducing the "total cost of ownership" by extending replacement intervals.
• Structural Vandal Defense: The trim features a weakened spindle design. In the event of a high-torque attack on the exterior lever, the spindle breaks cleanly to protect the internal 12-gauge steel case, keeping the room secure.
• Severe Weather Protection: Approved for Florida HVHZ with a design load rating of ± 70.0 PSF, this lockset ensures that the building envelope remains secure during extreme wind and pressure events.
• Flexible Keying Systems: Provided with an SCC standard cylinder, the MR148 integrates seamlessly into existing master key systems. It also supports 6 or 7-pin Interchangeable Cores (IC) for rapid re-keying during facility-wide security updates.
• Healthcare & Cleanroom Ready: Available with an optional antimicrobial coating, this hardware helps inhibit the growth of bacteria and microbes on high-touch surfaces, making it an ideal choice for school clinics and laboratory environments.