Economic Double Action Floor Spring(1800) 
The floor spring has the following characteristics: 
1.Surface Paint: No painting peel  off        
2.We have passed five different test process(such as pressure-relieving processing) to prevent the oil spill.      Leak   rate:0.3%      
3.Unpack Passed Rate:99%
4.We use the hydraulic oil with Anti-fire, Anti-burning, Anti-freezing,could be operated at –45℃                                                                                                
5.The main parts of the machine core have been done the heat treatment processing,it can prolong the working life.
6.Max door capacity:130kg 
7.Max door opening  angle:105 degree
8.Max door width& height:1250mm mm×2400mm 
9.Dimension of appearance :304×152×49mm 
10.Lowest working temperature:–45℃ 
11.Tested   cycles:500,000    
12.Hold-open at 90?(double action open floor spring)