Why the United States Nibo valve ductile iron

The United States Nibo Ke is the United States the largest rated pressure ductile iron valve manufacturer. The NIBCO multi-turn valve is ideally suited for many applications: where cast iron or cast steel valves can be installed in industries such as hydrocarbons, chemicals, ships, fire protect.......

Application of Rotary Valve in Refining and Chemical Plant

1, the characteristics of rotary valves The valve is usually divided into straight-line program and rotary two categories. Straight-stroke valves allow or shut off the flow of fluid through a rectilinear moving part such as a ram. Straight travel valves are globe valves, gate valves, diaphragm .......

Rotary vane vacuum pump working principle

Rotary vane vacuum pump (referred to as rotary vane pump) is a kind of oil-sealed mechanical vacuum pump. The working pressure range of 101325 ~ 1.33 × 10-2 (Pa) belongs to the low vacuum pump. It can be used alone or as a foreline pump for other high-vacuum or ultra-high vacuum pumps. .......