Changchun Kuancheng Boiler Air Vent Valve Factory (formerly Jilin Zhongquan Industrial Co., Ltd.) was founded in 1985. We specialize in the manufacturing and sales of automatic air vent valves, geothermal filter valves and Zhongquan‑brand mixing faucets.

Our flagship product, the Zhongquan automatic air vent valve, holds multiple national patents. It was awarded the titles of Jilin Famous Brand and Jilin High‑Quality Product of China for the period from 2013 to 2019.

The Zhongquan mixing faucet adopts our self‑developed dual‑temperature dual‑control technology. Its main body undergoes a 24‑hour salt‑spray test for safe and reliable performance. The water temperature can be set independently and remains stable without repeated adjustment. The water flow can be precisely controlled at one step according to calibrated scales. The spout is swivel‑type to adjust the water flow direction freely. It effectively saves water and electricity while delivering exceptional convenience.

The Zhongquan trademark was officially registered in 1991. Over the past four decades, our enterprise has stood the test of customers with strong R&D capabilities, superior product quality and continuous innovation. Nowadays, numerous air vent valves of various specifications and shapes are available on the market. However, most of them fail to perform the core functions of a qualified air vent valve: fast air discharge without water carry‑over and reliable sealing against leakage. The Zhongquan air vent valve has become a symbol of premium quality for our customers, delivering genuine value for money.

Our products are sold nationwide and exported overseas with well‑established distribution channels. We invest heavily in advertising and promotion on domestic and international websites. From production quality control and sales network development to after‑sales service, customer feedback and anti‑infringement actions, the Zhongquan team adheres to our innovation‑oriented corporate culture at all times. Committed to quality, integrity, development and innovation, we strive to be an industry leader. We aim to grow and refine the Zhongquan brand to create greater social and economic benefits in return for society and the public.

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