A manual door closer stores the energy used in the opening of the door in a compression or torsion spring and releases it to close the door. Some closers allow for adjustment of the strength of the spring, making it easier or more difficult to push the door open.
Norton 7500SS Regular Arm Corrosion-Resistant Institutional Multi-Sized Door Closer Learn More$668.25
The Fire Guard 12-2468-120VAC-EB of Electromechanical Closer-Holder Release Devices are designed to hold open fire and smoke rated doors until power is interrupted by a fire alarm condition or remote release switch. The Fire Guard 12-2468 is also available with an integrated photoelectric smoke detector for use in facilities lacking a fire/smoke detection system or where a redundant system is required for added life and safety protection. Learn More$1,021.88