Specification
JD Glass product catalogs · Door Closers
Overhead Concealed Door Closers
- medium and adjustable spring closers for doors 30" to 48" wide, up to 250 lb
- 1/2" and 7/8" spindle versions; 90° and 105° hold-open and no hold-open models
- Adjustable spring size 1–4, barrier-free; mounting clips included; 5-year limited warranty
- D200 / D300 Series with sealed spring cap, heavy-duty spindle seal and double O-ring valves
- Dorma RTS88 cast iron closer: 250 lb per door, 1-3/4" × 4" minimum header, backcheck and pressure relief valve
- LCN 2030 Series: Grade 1 ANSI A156.4, UL 10C, for institutional high-traffic areas
- F900 heavy-duty adjustable closer: 1000 lb doors, 180° swing, spring power 1–6, UL listed
- door pressure gauge (0–35 lb) to verify opening force
Product lines
- medium and adjustable spring OHCC
- D200 / D300 Series
- Dorma RTS88
- LCN 6030 double acting
- LCN 2030 Series
- F900 heavy-duty
- Mounting clips, track rollers and bumpers













