News | Lever Handles Manufacturer

2026-07-13

Installing dummy door knobs is a simple hardware upgrade that improves both appearance and functionality. Unlike passage knobs or privacy knobs, dummy door knobs are non-turning decorative handles designed for doors that only require a pulling function.

2026-07-10

How To Repair Floor Spring

Repairing a floor spring requires identifying the actual cause of failure before replacing the entire unit. A floor spring controls door movement through a combination of hydraulic pressure, spring force and pivot rotation.

2026-07-09

How To Install Floor Spring Door Closer

Installing a floor spring door closer requires accurate positioning, correct hardware matching and careful adjustment. Unlike surface-mounted door closers, a floor spring is installed inside the floor and connected with the door pivot system, creating a concealed solution with better visual integration for glass doors, wooden doors and commercial entrances.

2026-07-08

How To Fix Floor Spring In Wooden Door

A floor spring installed on a wooden door controls opening and closing movement through a concealed hydraulic mechanism. When a wooden door becomes difficult to close, moves too quickly, stays open or creates abnormal noise, the problem may come from incorrect adjustment, installation position, damaged components or unsuitable door hardware selection.

2026-07-07

How To Adjust Glass Door Floor Spring

Adjusting a glass door floor spring is important for maintaining smooth opening, controlled closing speed and long-term door performance. A properly adjusted floor spring helps prevent problems such as doors closing too quickly, failing to latch completely, creating noise or causing unnecessary stress on glass panels and hinges.

2026-07-06

What Is A Floor Spring

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.

2026-06-29

How To Get Paint Off Of Door Knobs

Removing paint safely depends on the knob material and finish. Brass, stainless steel, zinc alloy, plated metal, and PVD surfaces react differently to solvents and abrasion.

2026-06-29

How To Get Paint Off Door Knobs

Paint removal must match the knob material and finish. Brass, stainless steel, zinc alloy, plated metal, and coated surfaces react differently to heat, solvents, and abrasion. Remove the knob and test the method on a hidden area first.

2026-06-29

How To Clean Door Knobs

Door knobs are high-touch surfaces, so regular cleaning helps protect hygiene, appearance, and operation. The method depends on whether the finish is stainless steel, brass, plated metal, painted metal, or PVD coated.

2026-06-29

How To Clean Antique Door Knobs

Antique door knobs should be cleaned according to material and finish. Brass, bronze, plated steel, glass, and porcelain need different care. A stable patina may be part of the original appearance and should not be polished away automatically.

2026-06-29

How To Change Old Door Knobs

Replacing old door knobs starts with checking the existing door preparation. Remove the screws, separate both knobs, then remove the latch. Measure door thickness, bore diameter, backset, spindle, and latch faceplate before choosing a replacement.

2026-06-26

How Do Door Knobs Work

HANGFAT focuses on stainless steel architectural hardware, including door knobs, lever handles, hinges, locksets, back plates and bathroom accessories. We support matched hardware supply for apartments, hotels, offices, bathroom doors and commercial interiors.