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Dorma RTS88-90-NHO-4 Non Hold Open 90° Overhead Concealed Door Closer Size 4 (Body Only)

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The RTS88 is designed to give lasting, dependable service where surface applied units and other types of closers are not suitable, or would interfere with the architectural design. The RTS88 may be easily installed in wood, aluminum, or hollow metal doors and frames, for single and double-acting doors. Contractors appreciate the RTS88 closer, because the majority of door and frame preparation is done prior to installation of the unit, resulting in less on-site machining. The RTS88 is also an excellent replacement closer for problem entrances encountering vandalism of surface applied closers.

Body Only Closer For Replacement

Availability: In stock


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Frequently Bought Together

Product Description


• Compact closer body is designed to fit into headers as small as 1-3/4" × 4".
• Closer body is non-handed.
• One closer for both single-acting or double-acting doors.
• Accommodates maximum door weight of 250 lb (interior) or 200 lb (exterior), including all hardware.
• A pressure relief valve protects closer from damage caused by forced closing.
• An integral cushion limits door swing to 90°.
• An auxiliary stop must always be installed in conjunction with RTS88.
• A mechanical backcheck slows down the door prior to contact with the cushion.
• Closing speeds are controlled by two non-critical adjustment valves.
• Sweep area is from 105° to 20°.
• Latch area is from 20° to 0°.
• Thermostatic valves insure constant closing speeds under varying temperatures.
• Furnished without hold open at 90°.
• The RTS88 offers a cast-iron body along with heavy-duty ball bearings at the spindle.
• Steel cam and roller assembly is coupled to dual steel pistons.

Additional Information

Additional Information

Manufacturer Dorma
Model RTS88-90-NHO-4
Application Non Hold Open 90°
Size ANSI Size 4
Mounting Overhead Concealed
Hand Non-Handed
U.L. Listed UL Listed
Warranty 5 Years
Weight 15.0000


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