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Check valves are also known as one-way and no return valves. Its core function is to automatically open and close according to the flow direction o...

1.Basic definitions and structural characteristics of check valve Check valves, also known as one-way valve and check valve, is an indispensable au...

In modern industrial fluid control system, valves not only have the function of opening and closing media, but also directly affect the safety, sta...

With the increasing requirements of process safety and system reliability requirements in petroleum, gas, chemical industry, electricity and energy...

As the global industry demands more and more safety, environmental protection and leakage control, more and more companies are paying attention to ...

INTRODUCTION Foot valve is an important component of many pump systems to maintain proper liquid flow and improve pump efficiency. It is usually in...

In 2025, a Russian customer visited our company to inspect the quality of our products and expressed satisfaction. Zhengmao Valve Co., Ltd. was est...

On December 10, 2025, the company organized a team-building activity, including a group badminton game.

On December 11, 2025, a Malaysian customer visited our factory and expressed great satisfaction, recognizing our production scale and product quali...

In industrial fluid control systems, the selection of valve materials directly determines the service life, operational stability and safety factor...

On November 30th, 152 ball valves manufactured by Zhengmao were completed, loaded onto trucks, and shipped to Indonesia. Founded in 1992, our compa...

On November 25th, Zhengmao shipped 242 high-pressure gate valves to Fangchenggang. Zhengmao Valve Co., Ltd. was established in 1992 in Oubei Street...