Product Description 1.Select the high quality steel for transmission parts.The usage cycle of Germany oil seal is over half a million times. 2.General design is suitable for opening doors with left/right hand and single/double opening. 3.Filled with high quality anti-icing hydraulic oil,ensuring that closing speed won't be affected at minus 20 degrees. 4.Can adjust 5mm all around in the metal box,and adjust ± 2 ° in longitudinal direction during zero calibration,making installation easier. 5.Applicable for all public wooden doors. Key Features 1.Iron casting body,adjustable capacity, door weighting up to maximum 150kg 2.Fully hydraulic control with maximum opening angle 105° 3.Two completely independent adjustable valves to control swing speed from 90° to 25°, latching speed from 25° to 0° which make the adjustment become precise and easy 4.Unique design for adjustable valves prevents the valves from not being driven out of closer to avoid leakage possibility 5.These floor springs are available in 90° Hold Open and Non Hold Open models. 6.This fully adjustable floor spring meets ADA requirements in that it can be set at 5 or 8.5 pound opening forces. 7.Three years warranty and tested 500,000 cycles Specification Model NO. SG-183 Speed Control Two adjustable Speeds Closing Speed Adjustment Speed 1 for 0°-25° Speed 2 for 25°-90° Applicable Door Width 1150mm/1300mm Applicable Door Weight 100kg/150kg Logo Customized Maximum Open Angel 105° Bearing Chrome steel Oil Material low temperature hydraulic fluid Application Temperature -40°C to 40°C Material cast iron Color Black (Standard),also can be Customized Features 500,000cycles tested 90°Hold-Open Angel yes Available for Shopping mall, house,hotel, conference, office Production Capacity 30,000pcs/month Sample Time 3-7 days Delivery Date 30 days after receiving deposit Warranty 2 years Standard CE