Norton 7974DPS LH 689 Concealed Overhead Security Closer

Norton 7974DPS LH 689 Overhead Concealed Security Closer offers a robust solution for door control with an aesthetically pleasing design. This non-hold open closer is designed for left-hand applications and comes with a security plate and Torx screws, ensuring a high level of tamper resistance. Ideal for both commercial environments like office buildings and sensitive settings such as detention facilities, the Norton 7970 series provides exceptional concealment; the closer, arm, and slide track are fully hidden when the door is closed. Constructed from durable aluminum, this size 4 closer is concealed within a 4-inch high frame header, making it perfect for maintaining a clean, unobtrusive look. Its hydraulic fluid is non-gumming and non-freezing, ensuring reliability under various conditions. The unit features four noncritical valves for independent regulation of sweep speed, latch speed, and backcheck cushioning. Additionally, the built-in cushioning shock absorber mechanism enhances the closing action, while the door position switch allows for remote monitoring of door status. Whether for high-traffic areas or security-sensitive locations, the Norton 7974DPS delivers strength and elegance, meeting the rigorous demands of modern door hardware applications.

Overhead Concealed Security Cl

Overhead Concealed Security Closer, Non-Hold Open, Size 4, LH, Security Plate, Torx Screws, Door Position Switch, Aluminum

Overhead concealed closers provide an aesthetically appealing way to close a door. In situations where a closer is needed but concealment in the frame header is required or desired, the Norton 7900 closer is the ideal solution for door control. Once installed, only the solid one-piece arm is visible when the door is open; therefore, this unit provides a high degree of vandal resistance. When the door is closed, the closer, arm and slide track are fully concealed. For applications where concealment is required and security is the main concern, the 7970 should be used. The 7900 overhead closers are best suited for high-profile applications such as office buildings or conference centers. The 7970 security closers offer the necessary concealment and tamper resistance required in detention and psychiatric facilities. Used in conjunction with the door position switch (DPS) they provide the ability to monitor door status remotely.

The 7900 overhead closers are best suited for high-profile applications such as office buildings or conference centers.

Overhead concealed closers provide an aesthetically appealing way to close a door. In situations where a closer is needed but concealment in the frame header is required or desired, the Norton® 7900 closer is the ideal solution for door control. Once installed, only the solid one-piece arm is visible when the door is open; therefore, this unit provides a high degree of vandal resistance.

• Closers for exterior (and) interior doors shall be full rack and pinion type with cast aluminum alloy shell.
• Closers shall be concealed in a 4" (102 mm) high frame header.
• The slide track shall be concealed in the top rail of the door.
• Hydraulic fluid shall be non-gumming and non-freezing.
• (Closer shall be provided with a fireblocking door liner to permit installation in 20-minute wood fire door assemblies.)
• Closer shall have (four) (five) noncritical valves, hex-key operated, to independently regulate sweep speed, latch speed, backcheck cushioning (and backcheck positioning) (and delayed action closing).
• [Closers shall be sized units (4, 5 or 6)].
• [Closers shall have power adjustment to permit a 50% increase in power over the minimum closing force for any size.]
• [Closers shall have multi-sized adjustment for (interior doors)(exterior doors)]
• Closer shall conform to Accessibility Code specifications.
• Degree of stop shall be field adjustable.
• Slide track shall have a built-in cushioning shock absorber mechanism.
• (Hold open mechanism shall be capable of release when holding function is not required. Hold open mechanism shall have an adjustable range 85°-110° of door opening and shall release with a manual pressure on the edge of the door in the direction of closer).
• Closer to be Norton® [Series 7900] [Series 7970] (with Norton® #790 Fire Block).
• 7970/7970DPS shall be supplied with Torx® lobular drive fasteners having a center security pin.

Resources

• 7970-B, & 7970-OP, NHO
• 7970DPS-B, & 7970DPS-OP, NHO