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【High Quality Material】Automatic door closer is made of high quality thickened aluminium alloy, high gloss oil surface sealing layer technology surface, body type sealing glaze treatment, wear resistant and scratch resistant, use temperature range -30°C~40°C (-22°F~104°F), adapt to the northern region cold winter, the temperature drops to dozens of degrees below zero, the door closer still operates freely.
【Excellent Performance】 The piston in the automatic door closer is made of 45# round steel with high-frequency quenching treatment to increase the wear resistance of the teeth. Gears are made of 20Cr round steel, gear heat treatment HRC 50°-55° hardness, low temperature resistance, high fatigue resistance, while the seal ring wear resistance, good sealing, no aging cracking, superior performance.
【Super Quiet Operation】Multiple noise reduction, using high toughness 60SI2Mn spring, use 10,000 times without deformation, refuse to misalignment to produce strange noise. Connecting rod and the main body with a square mouth anti-slip screw buckle connection, more solid and not easy to fall, high safety factor.
【Fire Door Closer】Fire Door Closer adopts FOSS lubricant with flame retardant, good lubrication, no corrosion of the body, prolonging the mechanical life, adding a safety guarantee for you. The door opens to any angle can automatically close, avoiding the phenomenon of not closing the door with your hand.
【Application】Automatic door closer body can be mounted on the door or on the door frame, the telescopic arm can be adjusted and retracted freely, even if the door frame door is not on the same plane, it can still be installed smoothly, suitable for household conventional room doors, security doors, fire doors, fire doors, stainless steel doors, framed glass doors, etc.