Dorma RTS88 Series overhead concealed door closer for both single and double-acting doors. The RTS88 will consist of a steel cam, rollers, and springs housed in a compact cast iron body. Closers will be capable of being installed in minimum 1-3/4" x 4" headers. RTS88 will have maximum door opening to 90º or 105º, trim conditions permitting. Sweep and latch speed will be controlled by two noncritical adjustment valves from 90º or 105º to closed. Built-in pressure relief valve will protect the closer from abuse caused by forced closing. A mechanical backcheck combined with a positive stop at 90º or 105º will be provided to protect the door and frame. The RTS88 closer will be available with hold open at 90º or 105º, or without hold open. The product shown here is just the replacement cylinder.
The Dorma RTS88 Offset Slide Arm 8812 is used on in the RST31, RST30, RTS29, RST28, RST27, RTS26 and RTS25 packages. This arm is used on Single Acting Doors.
The Dorma 8400 Center Case Cover is used the 8000 Series Surface Vertical Rod Devices. The cover is black plastic, the screws are not included. Dorma Part # CHCOV84
The Dorma RTS88 Top Arm 8835 is for use on Double or Single Acting doors that have a 1" top rail. This is the standard arm on the RST07 and RST10 packages.
