Door closer

Beam Concealed Hydraulic Door Closer is mainly consist of cam mechanism, spring, hydraulic cylinder, check valve, throttling valve, sealing system and housing. When closing the door, the elastic potential energy of the spring is converted to the linear displacement of the hydraulic cylinder, which trigger the hydraulic pump to drive the pistons. The flow rate can be adjusted by the throttling valve. The moving speed of hydraulic cylinder piston is controlled by the flow rate, which is adjusted by the orifice of the throttling valve to adjust the closing speed of the door. The linear displacement of the hydraulic cylinder is then converted to the rotational displacement of the door to accomplish the closure. TECHNICAL DATA The HB-DC25 is equipped with anodized aviation aluminum alloy housing, hardened alloy steel piston and controlling valve components, powder metallurgy cam mechanism and high-quality polyurethane sealing ring to ensure the reliability and durability of the Beam Concealed Hydraulic Door Closer. The HB-DC25 Please refer to Figure 1 for the opening and closing torque characteristics. Please refer to performance curves for rotation range. Door width: 400-940 mm Door weight: 10-100 kg (22-220 lbs) Max. opening angle: 95° Hover angle: 87° Surface treatment: Hard anodized Corrosivity grade: C5H