Ozone Door Closer NSK-780

Product Highlights

• Manufacturer: Ozone Secutech
• Model: NSK-780
• Type: Overhead door closer for glass doors
• Mounting: Overhead, using a glass mounting plate
• Requires: Matching mounting plate — sold separately
• Finish: Silver

Product Description

Ozone Door Closer NSK-780 is an overhead door closer designed for glass doors, mounted with a dedicated glass mounting plate rather than screwed into a frame.

That is the problem it solves. A conventional closer is screwed into a timber or metal frame — glass offers neither. The mounting plate clamps to the panel instead, giving the closer something solid to fix to without drilling into an already-toughened sheet.

Confirm whether your application needs a hold-open function before ordering. Note that hold-open closers must not be used on fire doors, where the door is required to close unaided.

Key Features

• Designed for glass doors: Mounts via a plate rather than screwing into a frame that does not exist
• Controlled closing: Returns the door reliably instead of leaving it ajar
• Overhead mounting: Keeps the floor clear, unlike a floor spring which needs a recess in the slab
• No floor excavation needed: A practical retrofit where cutting the floor is not an option

Technical Specifications

Technical Specifications (Quick Reference)

You Will Also Need the Mounting Plate

• The mounting plate is a separate purchase. The NSK-780 cannot be fitted to a glass door without it — there is nothing else to fix to
• Use the plate made for this model. Ozone lists a specific mounting plate for the NSK-780; plates are not interchangeable between closer models
• Confirm your door weight and width against the closer’s rating before ordering
• Overhead closer or floor spring? An overhead closer avoids cutting the floor, which makes it the practical choice for retrofits. A floor spring is neater and hides the mechanism entirely, but needs a recess in the slab

FAQs

1) Why does a glass door need a special closer?

Because there is no frame to screw into. A conventional closer fixes to timber or metal; on glass, a mounting plate clamps to the panel to give the closer something solid to attach to.

2) Is the mounting plate included?

No — it is sold separately, and the NSK-780 cannot be fitted without it. Order the plate made specifically for this model; they are not interchangeable across closers.

3) Should I use this or a floor spring?

An overhead closer avoids cutting the floor, which makes it the practical choice for a retrofit or where the slab cannot be excavated. A floor spring is neater and hides the mechanism, but needs a recess formed in the floor.

4) Can I use hold-open on a fire door?

No. A fire door must close unaided to do its job. Hold-open devices on fire doors are only permitted where they release automatically on alarm, which a mechanical hold-open closer does not do.

5) What door weight will it handle?

Please confirm the rating against your door before ordering — the figure is not published for this variant. Send us your door dimensions and glass thickness and we will check.

Returns & Exchange Policy

1. Return within 24 hours of delivery for:
   • Damaged or defective product
   • Wrong or missing item
2. Product cannot be returned once installed or used
3. Refer to Refund Policy for complete details