china backflow preventer - Factory, Suppliers, Manufacturers from China

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History of the Development of China's Valve Industry (2)

The initial stage of the valve industry (1949-1959) 01Organize to serve the recovery of the national economy The period from 1949 to 1952 was the period of my country’s national economic reco...
Butterfly valve knowledge discussion

In the 30s, the butterfly valve was invented in United States, introduced to the Japan in the 50s, and was widely used in Japan in the 60s, and it was promoted in China after the 70s. At present, b...
Butterfly Valve Introduction

Introduction: A butterfly valve is from a family of valves called quarter-turn valves. In operation, the valve is fully open or closed when the disc is rotated a quarter turn. The “butterfly...
Pressure test method for industrial valves.

Before the valve is installed, the valve strength test and valve sealing test should be performed on the valve hydraulic test bench. 20% of low-pressure valves should be inspected randomly...
TWS valves – the connection between valves and pipes

The connection between the valve and the pipe The way in which the valve is connected to the pipe (1) Flange connection: Flange connection is one of the most common pipe connection methods. Gaskets...
Waters Middle Management Effective Execution Training

In order to comprehensively improve the company’s middle management work execution, results-oriented, in-depth study of efficient execution system, improve work efficiency, and create a high-...