About Us

Who we are?

ningbo pentagon damper corporation specializes in making hydraulic door hardware.
hydraulic door hardware factory in China. focus and professional.

Ningbo Pentagon Damper Corporation is a designer and manufacturer of innovative hydraulic door hardware since 2011. Our mission is to make every door closing experience more comfortable, elegant, and safer.

As early as 2003, the company’s predecessor Cola industry has already started to develop hydraulic dampers and it became the number one in global market for the piano damper field. Then Pentagon was set up to expand to the door hardware industry which well applicated our technologies.

Rich experience in hydraulic field enables us to use best-practice in engineering, design, and workmanship standards resulting in superior product performance, safety, and reliability. It passed ISO9001 and CE, holds more than 50 China and International patents, and has been awarded “National High-Tech Enterprise” since 2015.

Pentagon company is committed to provide solutions for glass and wooden doors with more aesthetics. Our factory has a professional technical team with a deep understanding of the hydraulic technology, and have independently designed and developed a series of products, including hydraulic patch fittings, hydraulic glass door hinges, hydraulic wooden door hinges and concealed door closers, and soft close door dampers etc.
Our factory covers more than 5,000 square meters, has 90 employees and annual turnover of 5,000,000.0 US dollars, The production line equipped with CNC machining center, precision cutting, grinding and drilling machine, automatic oiling and air tightness checking.
We hope to bring new vitality to the global door hardware industry through our unremitting efforts. We take the production of high-quality, safe and user-friendly hydraulic door hardware products as our lifelong career pursuit.

hydraulic door hardware factory in China

Why choose us?

We supply door manufacturers, hardware distributors, hotel contractors, architects, etc.  We can be one of your best suppliers for the hydraulic hinge field for our below advantages:

◆ Rich technology accumulation in the hydraulic field.
◆ Superior sealing and precision control, strict production process management audited by ISO9001, SGS, Intertek CE.
◆ A global leader in the hydraulic piano damper industry.

◆ OEM experience for leading hardware brands.
◆ Self-developed intellectual property rights
◆ Germany Red Dot Design Award.

the internal structure of hydraulic door hinges from ningbo pentagon