Citroen Manual Knife gate valve http://www.telonvalve.net/p187.htm dark bar 
 Overview of new products this knife-shaped gate is the gate of the new varieties, small size, light weight, light materials, sewage, coal slurry, syrup, slurry, air, slag-water mixture, water, paper, mining and other industries the ideal product. Knife-shaped gate metal to metal seal, rubber or soft metal seal. In the opening and closing process, the gate and the sealing surface with a special design, low friction, durable. On such a knife-shaped gate of the conventional seal sealing the form of a breakthrough, with the superstructure, making the area enclosed by a large rectangular sealed into a small area of ??the circumference of the seal, the sealing performance significantly improved. In the circular seal of the basis, using the current international advanced into the area of ??the floating seal the circumference of sealing, sealing performance significantly improved. In the circular seal of the basis, using the current international advanced floating seal structure (see Figure 1) allows the seal to the pipe with the same life, and thus enhance the overall life of the valve. Such a valve hand wheel at the top of the device after the installation of the envelope, you can make all the moving parts in the valve closed state, the screw drive gate and stem dry lubricant and will not jam. Particularly suitable for dry dust and harsh environments and long-term work (Figure 2). Note: You can use the unit according to the environment and the requirements of design and production for the user to install and use. 
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