Texas Shenglong skilled ventilation and air conditioning plant, the production of design and construction in the central air-conditioning end of production and sales of air conditioning and ventilation equipment, tank centrifugal blower, centrifugal exhaust fan, low noise centrifugal fan, modular centrifugal fan, 4-72 centrifugal fan, plenum, micro-perforated muffler in the same industry with absolute quality and integrity to win the trust of our customers and support. Your satisfaction is our forward momentum over pressure valve The device consists of frame, the valve plate and the counterweight consisting residual pressure valve manufacturer, valve plate maximum opening angle of 45 ° from vertical type residual pressure valve, can be used in the purification plant or clean room fire residual pressure valve, used to maintain indoor and outdoor positive pressure, excess air from the room, to prevent outside air intrusion. Residual pressure valve, Shenglong air conditioning (certified), Linfen residual pressure valve provided by the Texas Shenglong ventilation and air conditioning plant. Texas Shenglong ventilation and air conditioning plant (www.fengguan666.com) (www.dzsltfkt.com) is an industry leader in Shandong Dezhou, fans, ventilation equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Shenglong air conditioning in leadership with the staff warmly welcome all inquiries negotiations to create a better future Shenglong air conditioning.