Plunger valve

Non-metallic sealing flange with the national standard valve sized drum-shaped plunger connected to a metal gate and drum-type sealing flange plunger valve hand wheel operating mechanism has two forms, namely, hand wheel rotation and not only cook, By moving up and down movement of the stem only without rotation. When the valve is fully open valve stem elongation to the highest point, but still in protective pouches. Advantage of the operating mechanism of this hand wheel as follows: 1, hand Lunbu Shang, small space occupied by the next movement, adapted to fit in a compact space of the piping system. 2. Turn the hand wheel torque does not act directly on the stem, the stem is not easy to produce bending, and rotational torque is small. 3, the valve stem in the protective cover on the lower motor, and the outside world, suitable for outdoor installation, to avoid the atmosphere by blowing sand wear and alkali corrosive substances.