- For UPWARD-OPENING FLAP DOOR used with concealed hinges
- Used in pairs
- HDSN-30 is designed to hold door in closed and opened position
- Arm bracket for wood and aluminum frame avail-able. Specify when ordering
- Torque Calculation: Torque = Door Height x 1/2" x Door Weight, In case of opening angle 90° K-Type (Light Duty): 140~179 kg·cm (122~155 lbs·inch)/pair, M-Type (Medium Duty): 180~219 kg·cm (156~190 lbs·inch)/pair, H-Type (Heavy Duty): 220~259 kg·cm (191~225 lbs·inch)/pair, S-Type (Super Heavy Duty): 260~300 kg·cm (226~260 lbs·inch)/pair
WARNING: This product can expose you to acrylonitrile, butadiene, styrene, nickel and chromium, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65WARNINGs.ca.gov.