1. Choose the fitting one
Two mechanisms deliver different function. Choose based on your preference.
|DS||Spring power+Spring power||Dual Power adjuster, double power output|
|SA1||Spring power+Mechanical buffer||Door closing+control closing speed in 0°-20°|
|SA||Spring power+Mechanical buffer||Door closing+control closing speed in 20°-90°|
|SB||Spring power+hold-open||Door closing+hold-open in 20°-90°|
|HA||Hydraulic buffer+mechanical buffer||Hydraulic buffer in 0-20°+control speed in 20-90°|
|HB||Hydraulic buffer+hold-open||Hydraulic buffer in 0-20°+hold-open in 90°+/-5°|
5. Mechanical & Hydraulic: similar, but not the same
Hydraulic hinge offers 2 stages of deacceleration similar to door closer, while mechanical hinge offers quite average closing speed using a special mechanical damper.