PDQ MR136 PFEF Dormitory/Exit Function Mortise Lockset - Grade 1 

The PDQ MR136 PHL (often ordered as PFEF for the Philadelphia lever on a forged F-Series escutcheon) is a premier Grade 1 Dormitory Function Mortise Lockset engineered for the most demanding institutional environments. While typical commercial locks are rated for one million cycles, the PDQ MR Series is tested to over 11 million cycles—extending the hardware lifespan by 11 times the industry standard. This lockset is the definitive solution for university housing, military barracks, and multi-family residential complexes where maximum security and extreme durability are required.

Constructed with a heavy-duty 12-gauge cold rolled steel mechanism and a 1-inch throw investment cast stainless steel deadbolt, the MR136 provides a formidable defense against unauthorized entry. The Philadelphia (PHL) lever offers a sleek, modern architectural aesthetic in a US26D Satin Chrome finish. Its "return-to-door" design is not only ADA compliant but also serves as a safety solution by preventing clothing, bags, or straps from snagging on the hardware in busy residential corridors.

ANSI Function F13: Dormitory / Exit Security

The ANSI F13 Dormitory Function provides a dual-layer security approach, combining a standard latchbolt with a heavy-duty deadbolt for enhanced occupant privacy and protection.

• Latchbolt Operation: The latchbolt is retracted by the lever from either side unless the outside lever is locked by a toggle or projection of the deadbolt.
• Deadbolt Privacy: Occupants can project the 1-inch stainless steel deadbolt from the inside via a thumbturn. When projected, the exterior lever becomes rigid, ensuring total privacy.
• Key Access: Authorized personnel can retract both the latchbolt and the deadbolt simultaneously from the exterior using a key, providing a reliable override for security and maintenance staff.
• Emergency Egress: A vital life-safety feature, the interior lever retracts both the latchbolt and the deadbolt in a single motion, ensuring immediate exit capability during emergencies without fumbling with thumbturns.

Technical Specifications

Engineered Solutions for Institutional Security

The PDQ MR Series addresses the specific technical and safety challenges of modern facilities:

• Vandal-Resistant Spindle: The "weakened spindle" design is a critical security solution. If the exterior lever is subjected to extreme torque or a hammer attack, the spindle breaks cleanly to prevent damage to the internal 12-gauge steel case, keeping the lock secure.
• Extreme Weather Durability: Certified for High Velocity Hurricane Zones (HVHZ) with a design load rating of ± 70.0 PSF, this lockset provides the structural integrity necessary for coastal buildings and severe weather environments.
• Anti-Sag Lever Technology: Constant use in dormitories leads to drooping handles. The MR Series utilizes independent, high-tension spring cartridges to ensure the Philadelphia lever remains perfectly level throughout its multi-million cycle life.
• Simplified Key Management: Provided with a Schlage C (SCC) compatible cylinder, the MR136 integrates easily into existing master key systems. It also supports Interchangeable Core (IC) options for rapid re-keying during tenant turnover.
• Fire Safety Compliance: With a UL 3-hour fire rating, this lockset ensures that dormitory doors remain a reliable fire and smoke barrier, protecting occupants while allowing for immediate one-motion egress.