Groove Tube connection technology, also known as clamp connection technology, grooved fittings include two categories of products: ① sealing effect of the connecting tube has a rigid couplings, flexible couplings, mechanical tee and groove flange; ② from connecting tube has a role in the transition elbows, tees, crosses, reducers, blind panels. Valve sleeve connection, only developed in recent years in our country, its connection and sealing principle is that when tightening the nut, ferrule under pressure to bite into the pipe wall edge portion, the outer sleeve and the cone and under pressure adhesion of the inner cone of the joint, it is possible to reliably prevent leakage. Weifang Grand Pipe Fittings Co., Ltd. focuses on the production and manufacture of various types of pipe trench thousands of the company to "people-oriented, science and technology enterprises, Zhilianglishi, integrity and service" service purpose, and constantly open up the domestic and international markets, and dedication to the sea internal and external customers to provide quality products and services. The company pursues "quality of survival, technology and development, brand benefit" business philosophy, and constantly open up the domestic market. There are a growing number of domestic and international customers and trust Weifang Grand fittings. The above information is from: Grand Pipe Fittings Co., Ltd. Weifang http://www.xlgoucaoguanjian.com