L2 - Spring-loaded return, closing, medium spring force
R2 - Spring-loaded return, opening, medium spring force
GN437.3 Hinges with a spring-loaded return allow doors to be automatically opened and closed by means of the torsion spring.
The return torque varies with the hinge opening angle. Endurance tests have shown that the torque does not change even after 100,000 opening / closing cycles.
Zinc die casting ZD - plastic coated, black, RAL 9005, textured finish SW, silver, RAL 9006, textured finish SR
Spring guide / Cover cap - Plastic (Polyacetal POM), temperature resistant up to 80 °C
Torsion spring - Spring steel
Stainless Steel-Spacer plates GN2370
Stainless Steel-Plates with tapped holes GN2372