A21F, A21H-C type spring inching valve internal thread dimensions and connecting dimensions Valve Co., Ltd. is located in Shandong, China Everbright International Kite Capital Cravens District, Weifang City, valves, Jinan-Qingdao, Lai Wei-speed, Jinan Railway running through the city district, transportation is very convenient. The company specializing in the production valve manufacturers, welcomed the new and old customers to order our products! Safety valve is the valve of a special branch of the family, stainless steel valves, safety valves because of its specificity is different from the other valves only acts as a switch, more importantly protect the safety of the device. With the rapid development of China's economic construction, the project works with a pressure control equipment is increasing. Shandong Everbright Valve Co., Ltd. specializing in the production valve manufacturers, Weifang valve, welcome new and old customers to order our products! Curtain area: When the cylindrical surface-shaped or conical surface shaped passage area valve at the top of the seat between the sealing surface is formed. The discharge area: the valve discharge minimum cross-sectional area of ??the fluid passage. For a full revelation valve discharge area equal to the flow area; for inching valve discharge area equal curtain area. Shandong Everbright Valve Co., Ltd. specializing in the production valve manufacturers, welcomed the new and old customers to order our products! Weifang stainless steel valves _ _ Valve Valve Co., Ltd. Shandong by Shandong Everbright Everbright valve. Shandong Everbright Valve Co., Ltd. (www.sdgdfm.com) located in Weifang City, Shandong Province, Cravens District Bao Tong Street North Makers Industrial Park. Scraps and development in the wave of market economy, the current Everbright valve has a high profile in the ball, and enjoys a good reputation. Everbright valve made whole network business alliance certification, marking our service and management level has reached a new height. Everbright valve staff willing to work with all people of insight and common development, for a better future.