Door Closer with Gear Shaft and Piston

Model Number: DC-01 Brand Name: ALLY Key Specifications/Special Features: Specification:Door width: 500 to 1,000mmDoor weight: 25 to 45kgFeatures:Available for metal, steel and wooden doorsCalm and quiet when be usedBody: adopts quality aluminum alloy one-time extrusion forming, with dense material and high strength, with surface spray coating treatment, with delicate lockPiston: material is 45# steel, with surface carburization treatment for high strength wear-resistance, at door opening, the gear shaft drives it to compress the spring and reserve the force for door closer, at door closing, under the resistance of hydraulic oil, it slows down the spring extension and realizes speed variation, or buffering in other wordGear shaft: material is 45# steel, with surface carburization treatment for high strength and wear resistanceSpring: adopts quality spring steel, with less than 1mm shortening after 30,000 times squeezing, at door opening, the spring is compressed, at door closing, the spring is stretches to produce door closing force to closer the doorSwing arm: material is cold-rolled sheet, main function is to transmit the door pushing force to the piston and to the spring, and then transform the spring force into door closing force to realize door closingAdvanced functions:Two stages speed controlled range: 180 to 15°, latching speed: 15 to 0°90° hold-open function: door can keep standstill when door is open at 90°Closing and latching continuous adjustment: fasting closing in3 seconds from 90° slowly door closing above 40sBuffer function: door closer will create resistance to avoid too much force, when open the door and hit the way by closing quickly and resistance can be adjustmentDelayed closing function: between 180 to 65°, present by factory is 20s, which can be reduced to 1s to facilitate the old and disabilities