Spring Action Hinges
These hinges incorporate a spring action within the pivot knuckle. The knuckle needs to be around double the size of the hinge so the spring can be built in.
Single Action Spring Hinge
Single action hinges work in one direction and can therefore replace door closers, for this reason they are popular for application on fire doors.
Swing Action Spring Hinge
These Hinges enable the door to open both ways, perfect for commercial use in restaurant kitchens.
This collection of spring action hinges is supplied by Frelan and Carlisle Brass."