Exit Alarms Parts and Diagrams: Von Duprin Guard-X Component Guide|Security Parts

Most facility managers only think about exit alarms parts and diagrams when the alarm fails to sound, the battery dies, or a disarming label gets peeled off. The Von Duprin Guard-X 2670 is the most widely installed commercial alarmed exit device in North America. It is not a standard exit device with an alarm kit added on. It is a purpose-built alarmed exit lock that integrates a stainless steel deadbolt rated to 1,600 pounds of force resistance, a 100-decibel alarm, an armed indicator light, and a Schlage SC-1 cylinder into a single housing. It complies with NFPA 101 Life Safety Code, is UL Listed for both panic exit hardware and fire exit hardware, carries a 10-year limited mechanical warranty and a 1-year limited electrical warranty, and ships non-handed in satin aluminum 628/US28 finish. The 2609 is the double door version.

What the Guard-X Was Built For

The Guard-X 2670 exists for one specific application: secondary exits where unauthorized use needs to be deterred without eliminating code-compliant egress. It identifies the door as an emergency exit and secures the opening against unauthorized entry or exit. Typical applications include back doors at restaurants, retail stores, discount stores, grocery stores, drug stores, clothing stores, and sporting goods stores where employee or customer misuse of a secondary exit is an operational problem.

Two features define the deterrent function:

The stainless steel deadbolt does not retract unless the key disarms the device first. It is tested to withstand 1,600 pounds of force, making it significantly more resistant to defeat than a standard latch bolt. The 100-decibel alarm sounds immediately when the push bar is activated without prior key disarming. The armed indicator light on the device face shows the armed state before any attempt is made to open the door.

The standard device ships with an SC-1 Schlage cylinder included. The 2609 double door variant coordinates alarm functions between two active leaves on a paired opening.

Every Replaceable Component in the Guard-X 2670

Alarm Battery

This is the most frequently replaced component on every Guard-X installation. The device uses a standard 9-volt battery to power the alarm circuit. When the battery fails, the device operates mechanically but produces no alarm sound on push bar activation, which is the worst failure mode for a deterrent device. Proactive replacement every six months on high-use secondary exits prevents silent failure without waiting for the symptom.

Schlage SC-1 Cylinder

The cylinder is what disarms the alarm before an authorized door use. The SC-1 keyway is Schlage's standard 5-pin tumbler residential and light commercial cylinder. It ships included with the Guard-X 2670. Replacement is needed when the cylinder wears from heavy use, when a key is lost, or when the building's key system is being re-keyed. The SC-1 keyway is widely available from Schlage-authorized locksmiths and can be ordered factory-keyed to a master key system.

Retainer Nut

The retainer nut secures the cylinder in the device housing. A loose retainer nut allows the cylinder to rotate in the housing rather than staying fixed, which prevents the alarm from disarming correctly when the key is turned. Retainer nuts are the most commonly overlooked service item on Guard-X devices. A torque check at every service visit takes 30 seconds and prevents the most frustrating "alarm won't disarm" service call.

Disarming Label

The "EMERGENCY EXIT ONLY, ALARM WILL SOUND" label is both an NFPA 101 code requirement and a deterrent element. Labels fade, peel, or are deliberately removed. A missing label removes a code compliance element and reduces deterrent effectiveness. Replacement labels are stocked individually.

Alarm Housing Assembly

The housing contains the sounder element and the circuit board that controls alarm timing and the indicator light. When the alarm sounds erratically, fails to sound despite a fresh battery, or the indicator light malfunctions, the housing assembly requires replacement. This is less common than battery or cylinder service but becomes necessary as devices age past their electrical warranty period.

Push Bar Assembly

The push bar completes the alarm circuit when depressed without prior disarming. Push bar wear from physical abuse or forced entry attempts requires assembly replacement. The push bar is replaceable without removing the full device from the door.

Deadbolt Assembly

The stainless steel deadbolt is the mechanical security element. Replacement is required when the bolt is physically damaged from a forced entry attempt significant enough to defeat the 1,600-pound resistance rating. This is not common but does occur in high-risk retail applications.

Sourcing Guard-X Parts at Security Parts

Security Parts organizes the complete Guard-X exit alarm parts catalog with model-specific components for the 2670 and 2609. The Von Duprin brand page covers the Guard-X alongside every other Von Duprin exit device series. Pre-order compatibility support at 845-935-0301 or sales@securityparts.com. Same-day shipping on stocked components.

Conclusion

The Von Duprin Guard-X 2670 is a purpose-built alarmed exit device with a 10-year mechanical warranty and a 1-year electrical warranty. Six primary replaceable components: 9-volt alarm battery, Schlage SC-1 cylinder, retainer nut, disarming label, alarm housing assembly, and push bar assembly. The battery is replaced most often. The retainer nut is inspected least often. The 2609 double door version shares all the same component specifications. Sourcing from the exit alarms parts and diagrams catalog at Security Parts starts with confirming single door (2670) or double door (2609), then navigating to the model-specific parts page with same-day shipping on stocked items.

FAQs

What alarm volume does the Von Duprin Guard-X produce?

100 decibels. It activates immediately when the push bar is pressed without prior key disarming. The armed indicator light shows armed status before any door use attempt.

What force resistance does the Guard-X deadbolt have?

1,600 pounds, per Von Duprin testing. This significantly exceeds standard latch bolt resistance and prevents the door from being forced open without triggering the alarm first.

What battery does the Guard-X 2670 use?

A standard 9-volt battery. Replace proactively every six months on high-use secondary exits. Battery failure causes silent operation with no alarm on push bar activation.

What cylinder ships with the Guard-X 2670?

A Schlage SC-1 5-pin tumbler cylinder. Re-keyable by any Schlage-authorized locksmith. Can be ordered factory-keyed to a building's master key system.