A floor spring is a concealed door closing device installed inside the floor beneath a door. It controls the opening and closing movement of swing doors while keeping the hardware hidden to maintain a clean architectural appearance. Compared with surface-mounted door closers, floor springs provide better visual integration and are widely used for glass doors, commercial entrances, hotels, offices and modern building projects.
A floor spring combines a hydraulic mechanism, spring force and adjustment system to control door speed, closing force and final latching movement. When the door is opened, the internal spring stores energy. After release, the hydraulic system controls the returning movement and allows the door to close smoothly.
EN 1154 defines requirements and test methods for controlled door closing devices installed on or in doors, frames or floors. The standard focuses on controlled closing performance, reliability and safety requirements for door closing systems.
The main function of a floor spring is to manage door movement through a combination of mechanical force and hydraulic control.
| Component | Function |
|---|---|
| Hydraulic body | Controls closing speed and movement stability |
| Spring mechanism | Provides closing force |
| Adjustment valve | Controls closing and latching speed |
| Spindle | Transfers door rotation force |
| Cover plate | Protects the internal mechanism and improves appearance |
| Pivot system | Supports smooth door operation |
Selecting the correct floor spring requires evaluating door weight, door width, opening frequency, door material, installation environment and required durability.
Floor springs are commonly used in:
Glass entrance doors
Office buildings
Hotels and restaurants
Shopping centers
Commercial buildings
Public facilities
Interior partition doors
For modern architectural projects, floor springs are often combined with other door hardware components to create a complete door system. HANGFAT provides various architectural hardware solutions including Stainless Steel Door Handle and other matching door accessories.
A trader may source floor springs and related hardware from different factories without controlling internal structures, production processes or batch consistency. Working with a direct manufacturer provides better control over material selection, product development and quality inspection.
HANGFAT integrates product development, manufacturing and independent marketing. With OEM and ODM capabilities, we support customized requirements including dimensions, finishes, packaging and project-specific hardware solutions.
Our product development capability also covers Lever Handles, Hinges and other architectural hardware products, helping customers source matched door hardware from one manufacturing partner.
Reliable floor springs require precise manufacturing and strict inspection. The production process generally includes:
Raw material inspection
Precision machining
Hydraulic component assembly
Surface treatment
Functional testing
Closing force adjustment
Final quality inspection
Important quality checkpoints include hydraulic sealing performance, spring strength, spindle accuracy, surface finish, corrosion resistance and operating cycle testing.
Material selection also directly affects product performance. Stainless steel components and suitable surface treatments help improve durability in commercial environments, especially in locations with frequent use or higher humidity.
Before selecting a floor spring, project requirements should be confirmed carefully.
| Selection Factor | Why It Matters |
|---|---|
| Door weight | Determines required spring strength |
| Door width | Affects closing force |
| Door material | Influences installation method |
| Opening frequency | Determines durability requirements |
| Environment | Defines corrosion protection needs |
| Finish | Matches architectural design |
For complete door hardware sourcing, floor springs should be evaluated together with handles, Hinges, locks and accessories. HANGFAT provides Stainless Steel Pull Handles, Stainless Steel Bathroom Accessories and related hardware solutions for commercial and architectural applications.
Before bulk production, buyers should confirm product specifications, approved samples, surface finish requirements, packaging standards and inspection criteria. Consistent production control helps reduce installation issues caused by dimensional differences or unstable quality.
HANGFAT focuses on stainless steel architectural hardware manufacturing, including Lever Handles, hinges, locksets, bathroom accessories and complete door hardware solutions. Our integrated production capability supports OEM and ODM projects with stable quality control and large-scale supply capacity.
A floor spring is not only a door closing component but also an important part of the complete door system. Choosing the right structure, material and manufacturing partner helps achieve smoother operation, longer service life and better project performance.
